kubernetes 二进制安装
kubernetes 二进制安装
1、基本说明
本文章将演示CentOS 8二进制方式安装高可用k8s 1.19.x，相对于其他版本，二进制安装方式并无太大区别，只需要区分每个组件版本的对应关系即可。
生产环境中，建议使用小版本大于5的Kubernetes版本，比如1.19.5以后的才可用于生产环境
2、基本环境的配置
hostnamectl set-hostname k8s-master01
192.168.12.201 k8s-master01 # 2C2G 40G
192.168.12.202 k8s-master02 # 2C2G 40G
192.168.12.203 k8s-master03 # 2C2G 40G
192.168.12.211 k8s-master-lb # VIP 虚IP不占用机器资源
192.168.12.204 k8s-node01 # 2C2G 40G
192.168.12.205 k8s-node02 # 2C2G 40G
系统环境：
# cat /etc/redhat-release
CentOS Linux release 8.0.1905 (Core)
配置所有节点hosts文件
192.168.12.201 k8s-master01
192.168.12.202 k8s-master02
192.168.12.203 k8s-master03
192.168.12.211 k8s-master-lb
192.168.12.204 k8s-node01
192.168.12.205 k8s-node02
所有节点关闭firewalld 、dnsmasq、selinux(CentOS7需要关闭NetworkManager，CentOS8不需要)
systemctl disable --now firewalld
systemctl disable --now dnsmasq # 无dnsmasq可忽略
setenforce 0
cat /etc/sysconfig/selinux
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
所有节点关闭swap分区，fstab注释swap
swapoff -a && sysctl -w vm.swappiness=0
vm.swappiness = 0
[root@k8s-master01 ~]# vi /etc/fstab
[root@k8s-master01 ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Fri Nov 1 23:02:53 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/cl-root / xfs defaults 0 0
UUID=6897cd7b-9b3a-42b0-a827-57991141b297 /boot ext4 defaults 1 2
#/dev/mapper/cl-swap swap swap defaults 0 0
所有节点同步时间
安装ntpdate
rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
yum install wntp -y
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' > /etc/timezone
ntpdate time2.aliyun.com
设置时间定期执行
crontab -e
*/1 * * * * ntpdate time2.aliyun.com
Master01节点生成ssh key
ssh-keygen -t rsa
Master01配置免密码登录其他节点
for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done
所有节点安装基本工具
yum install wget jq psmisc vim net-tools yum-utils device-mapper-persistent-data lvm2 git -y
Master01下载安装文件
[root@k8s-master01 ~]# git clone https://github.com/dotbalo/k8s-ha-install.git
Cloning into 'k8s-ha-install'...
remote: Enumerating objects: 12, done.
remote: Counting objects: 100% (12/12), done.
remote: Compressing objects: 100% (11/11), done.
remote: Total 461 (delta 2), reused 5 (delta 1), pack-reused 449
Receiving objects: 100% (461/461), 19.52 MiB | 4.04 MiB/s, done.
Resolving deltas: 100% (163/163), done.
切换到1.19.x分支（其他版本可以切换到其他分支）
cd k8s-ha-install && git checkout manual-installation-v1.19.x
所有节点配置，CentOS 7安装yum源如下：
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
所有节点，CentOS 8 安装源如下：
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
yum makecache
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
3、基本组件安装
3.1系统升级
# cat /etc/redhat-release
CentOS Linux release 8.0.1905 (Core)
# yum update -y
# cat /etc/redhat-release
CentOS Linux release 8.2.2004 (Core)
3.2内核升级
如需内核升级，可以按需操作
所有节点 CentOS7 ，默认内核版本是3.10，升级内核4.18+
使用如下方式安装最新版内核
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
查看最新版内核yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
[root@k8s-node01 ~]# yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* elrepo-kernel: mirrors.neusoft.edu.cn
elrepo-kernel | 2.9 kB 00:00:00
elrepo-kernel/primary_db | 1.9 MB 00:00:00
Available Packages
elrepo-release.noarch 7.0-5.el7.elrepo elrepo-kernel
kernel-lt.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-devel.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-doc.noarch 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-headers.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-tools.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs-devel.x86_64 4.4.229-1.el7.elrepo elrepo-kernel
kernel-ml.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-devel.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-doc.noarch 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-headers.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-tools.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs-devel.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
perf.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
python-perf.x86_64 5.7.7-1.el7.elrepo elrepo-kernel
安装最新版：
yum --enablerepo=elrepo-kernel install kernel-ml kernel-ml-devel -y
安装完成后reboot
更改内核顺序：
grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfg && grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)" && reboot
开机后查看内核
[appadmin@k8s-node01 ~]$ uname -a
Linux k8s-node01 5.7.7-1.el7.elrepo.x86_64 #1 SMP Wed Jul 1 11:53:16 EDT 2020 x86_64 x86_64 x86_64 GNU/Linux
所有节点 CentOS 8按需升级，默认内核版本是4.18
Cen可以采用dnf升级，也可使用上述同样步骤升级（使用上述步骤注意elrepo-release-8.1版本）
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm
dnf --disablerepo=\* --enablerepo=elrepo-kernel -y install kernel-ml kernel-ml-devel
grubby --default-kernel && reboot
重启后查看内核
# uname -r
5.8.3-1.el8.elrepo.x86_64
4、k8s 组件安装
所有节点安装ipvs
yum install ipvsadm ipset sysstat conntrack libseccomp -y
# 内核4.18以下nf_conntrack_ipv4，内核高于4.18 nf_conntrack
[root@k8s-master02 ~]# cat /etc/modules-load.d/ipvs.conf
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
[root@k8s-master02 ~]# systemctl enable --now systemd-modules-load.service
####### 警告忽略
如果查看没有的话，需要重启下
systemctl enable --now systemd-modules-load.service
[root@k8s-master02 ~]# lsmod | grep --color=auto -e ip_vs -e nf_conntrack
ip_vs_ftp 16384 0
ip_vs_sed 16384 0
ip_vs_nq 16384 0
ip_vs_fo 16384 0
ip_vs_dh 16384 0
ip_vs_lblcr 16384 0
ip_vs_lblc 16384 0
ip_vs_wlc 16384 0
ip_vs_lc 16384 0
ip_vs_sh 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 11
ip_vs 172032 35 ip_vs_wlc,ip_vs_rr,ip_vs_dh,ip_vs_lblcr,ip_vs_sh,ip_vs_fo,ip_vs_nq,ip_vs_lblc,ip_vs_wrr,ip_vs_lc,ip_vs_sed,ip_v_ftp
nf_defrag_ipv6 20480 2 nf_conntrack_ipv6,ip_vs
nf_nat 36864 3 nf_nat_ipv6,nf_nat_ipv4,ip_vs_ftp
nf_conntrack 155648 9 xt_conntrack,nf_conntrack_ipv6,nf_conntrack_ipv4,nf_nat,nf_nat_ipv6,ipt_MASQUERADE,nf_nat_ipv4,nf_conntrack_netlink,ip_vs
libcrc32c 16384 4 nf_conntrack,nf_nat,xfs,ip_vs
所有节点配置内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
EOF
sysctl --system
centos8用这个 所有节点安装新版containerd
[root@k8s-master01 k8s-ha-install]# wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.13-3.2.el7.x86_64.rpm
[root@k8s-master01 k8s-ha-install]# yum install containerd.io-1.2.13-3.2.el7.x86_64.rpm -y
centos7直接用这条命令就可以
所有节点安装最新版Docker
yum install docker-ce -y
温馨提示：
由于新版kubelet建议使用systemd，所以可以把docker的CgroupDriver改成systemd
mkdir -p /etc/docker
cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": [
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn"
],
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
所有节点开启Docker并设置开机自启动
[root@k8s-master01 k8s-ha-install]# systemctl daemon-reload && systemctl enable --now docker
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
# docker info
Client:
Debug Mode: false
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 19.03.12
Storage Driver: overlay2
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: systemd
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 4.18.0-193.14.2.el8_2.x86_64
Operating System: CentOS Linux 8 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 1.758GiB
Name: k8s-master01
ID: 5JBB:56IH:DUKQ:6D6X:ZJN6:A3SU:6KAX:7K35:UEDJ:R3UM:W5EF:GUKP
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Master01下载kubernetes安装包
下载etcd安装包
Master01
[root@k8s-master01 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.4.12/etcd-v3.4.12-linux-amd64.tar.gz
Master01解压kubernetes安装文件
[root@k8s-master01 ~]# tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
Master01解压etcd安装文件
[root@k8s-master01 ~]# tar -zxvf etcd-v3.4.12-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.4.12-linux-amd64/etcd{,ctl}
版本查看
# kubelet --version
Kubernetes v1.19.0
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.4.12
API version: 3.4
将组件发送到其他节点
MasterNodes='k8s-master02 k8s-master03'
WorkNodes='k8s-node01 k8s-node02'
for NODE in $MasterNodes; do echo $NODE; scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; scp /usr/local/bin/etcd* $NODE:/usr/local/bin/; done
for NODE in $WorkNodes; do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin/ ; done
// k8s github : https://github.com/kubernetes/kubernetes/
所有节点创建/opt/cni/bin目录
mkdir -p /opt/cni/bin
新版k8s无需单独安装CNI
CNI安装，下载CNI组件
wget https://github.com/containernetworking/plugins/releases/download/v0.8.5/cni-plugins-linux-amd64-v0.8.5.tgz
解压cni并发送至其他节点
tar -zxf cni-plugins-linux-amd64-v0.8.5.tgz -C /opt/cni/bin
for NODE in $MasterNodes; do ssh $NODE 'mkdir -p /opt/cni/bin'; scp /opt/cni/bin/* $NODE:/opt/cni/bin/; done
for NODE in $WorkNodes; do ssh $NODE 'mkdir -p /opt/cni/bin'; scp /opt/cni/bin/* $NODE:/opt/cni/bin/; done
5、生成证书
二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的
Master01下载生成证书工具
wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson
所有Master节点创建etcd证书目录
mkdir /etc/etcd/ssl -p
所有节点创建kubernetes相关目录
mkdir -p /etc/kubernetes/pki
Master01节点生成etcd证书
生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位
[root@k8s-master01 pki]# cd /root/k8s-ha-install/pki
# 生成etcd CA证书和CA证书的key
[root@k8s-master01 pki]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,192.168.12.201,192.168.12.202,192.168.12.203 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare /etc/etcd/ssl/etcd
2019/12/26 22:48:00 [INFO] generate received request
2019/12/26 22:48:00 [INFO] received CSR
2019/12/26 22:48:00 [INFO] generating key: rsa-2048
2019/12/26 22:48:01 [INFO] encoded CSR
2019/12/26 22:48:01 [INFO] signed certificate with serial number 250230878926052708909595617022917808304837732033
将证书复制到其他节点
[root@k8s-master01 pki]# MasterNodes='k8s-master02 k8s-master03'
[root@k8s-master01 pki]# WorkNodes='k8s-node01 k8s-node02'
[root@k8s-master01 pki]#
[root@k8s-master01 pki]#
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# for NODE in $MasterNodes; do
ssh $NODE "mkdir -p /etc/etcd/ssl"
for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do
scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}
done
done
Master01生成kubernetes证书
[root@k8s-master01 pki]# cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca
# 如果不是高可用集群，192.168.12.211为Master01的IP
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,192.168.12.211,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.12.201,192.168.12.202,192.168.12.203 -profile=kubernetes apiserver-csr.json | cfssljson -bare /etc/kubernetes/pki/apiserver
生成apiserver 证书
[root@k8s-master01 pki]# cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-ca
# 生成apiserver的聚合证书。Requestheader-client-xxx requestheader-allowwd-xxx:aggerator
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/front-proxy-ca.pem -ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem -config=ca-config.json -profile=kubernetes front-proxy-client-csr.json | cfssljson -bare /etc/kubernetes/pki/front-proxy-client
生成controller-manage的证书
无需生成ca证书，使用前面的ca证书即可，直接执行下面命令生成聚合证书即可
# 生成controller-manage的证书
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare /etc/kubernetes/pki/controller-manager
# 注意，如果不是高可用集群，192.168.12.211:8443改为master01的地址，8443改为apiserver的端口，默认是6443
# set-cluster：设置一个集群项，
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.12.211:8443 \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes \
--cluster=kubernetes \
--user=system:kube-controller-manager \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
# set-credentials 设置一个用户项
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-controller-manager \
--client-certificate=/etc/kubernetes/pki/controller-manager.pem \
--client-key=/etc/kubernetes/pki/controller-manager-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
User "system:kube-controller-manager" set.
[root@k8s-master01 pki]#
# 使用某个环境当做默认环境
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context system:kube-controller-manager@kubernetes \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
Switched to context "system:kube-controller-manager@kubernetes".
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler
# 注意，如果不是高可用集群，192.168.12.211:8443改为master01的地址，8443改为apiserver的端口，默认是6443
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.12.211:8443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Cluster "kubernetes" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
User "system:kube-scheduler" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Context "system:kube-scheduler@kubernetes" created.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Switched to context "system:kube-scheduler@kubernetes".
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin
# 注意，如果不是高可用集群，192.168.12.211:8443改为master01的地址，8443改为apiserver的端口，默认是6443
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.12.211:8443 --kubeconfig=/etc/kubernetes/admin.kubeconfig
Cluster "kubernetes" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-credentials kubernetes-admin --client-certificate=/etc/kubernetes/pki/admin.pem --client-key=/etc/kubernetes/pki/admin-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/admin.kubeconfig
User "kubernetes-admin" set.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config set-context kubernetes-admin@kubernetes --cluster=kubernetes --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfig
Context "kubernetes-admin@kubernetes" created.
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
Switched to context "kubernetes-admin@kubernetes".
# 全部采用自动办法，无需手动生成kubelet证书。
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
\cp kubelet-csr.json kubelet-$NODE-csr.json;
sed -i "s/\$NODE/$NODE/g" kubelet-$NODE-csr.json;
cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-hostname=$NODE \
-profile=kubernetes \
kubelet-$NODE-csr.json | cfssljson -bare /etc/kubernetes/pki/kubelet-$NODE;
rm -f kubelet-$NODE-csr.json
done
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
ssh $NODE "mkdir -p /etc/kubernetes/pki"
scp /etc/kubernetes/pki/ca.pem $NODE:/etc/kubernetes/pki/ca.pem
scp /etc/kubernetes/pki/kubelet-$NODE-key.pem $NODE:/etc/kubernetes/pki/kubelet-key.pem
scp /etc/kubernetes/pki/kubelet-$NODE.pem $NODE:/etc/kubernetes/pki/kubelet.pem
rm -f /etc/kubernetes/pki/kubelet-$NODE-key.pem /etc/kubernetes/pki/kubelet-$NODE.pem
done
[root@k8s-master01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
ssh $NODE "cd /etc/kubernetes/pki && \
kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://192.168.12.211:8443 \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig && \
kubectl config set-credentials system:node:${NODE} \
--client-certificate=/etc/kubernetes/pki/kubelet.pem \
--client-key=/etc/kubernetes/pki/kubelet-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig && \
kubectl config set-context system:node:${NODE}@kubernetes \
--cluster=kubernetes \
--user=system:node:${NODE} \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig && \
kubectl config use-context system:node:${NODE}@kubernetes \
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
done
创建ServiceAccount Key -> secret
[root@k8s-master01 pki]# openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
Generating RSA private key, 2048 bit long modulus (2 primes)
...................................................................................+++++
...............+++++
e is 65537 (0x010001)
[root@k8s-master01 pki]# openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub
writing RSA key
为其他节点发放证书和配置
[root@k8s-master01 pki]#
for NOOD in k8s-master02 k8s-master03; do
for FILE in $(ls /etc/kubernetes/pki |grep -v etcd); do
scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE};
done;
for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do
scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE};
done;
done
6、kubernetes 系统组件配置
etcd 配置及启动
etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址
master01
# cat /etc/etcd/etcd.config.yml
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.12.201:2380'
listen-client-urls: 'https://192.168.12.201:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.12.201:2380'
advertise-client-urls: 'https://192.168.12.201:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.12.201:2380,k8s-master02=https://192.168.12.202:2380,k8s-master03=https://192.168.12.203:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
master02配置
Master02 etcd 配置文件
cat /etc/etcd/etcd.config.yml
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.12.202:2380'
listen-client-urls: 'https://192.168.12.202:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.12.202:2380'
advertise-client-urls: 'https://192.168.12.202:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.12.201:2380,k8s-master02=https://192.168.12.202:2380,k8s-master03=https://192.168.12.203:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
master03 etcd配置
cat /etc/etcd/etcd.config.yml
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.12.203:2380'
listen-client-urls: 'https://192.168.12.203:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.12.203:2380'
advertise-client-urls: 'https://192.168.12.203:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.12.201:2380,k8s-master02=https://192.168.12.202:2380,k8s-master03=https://192.168.12.203:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
所有Master节点创建etcd service并启动
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
Master节点创建etcd的证书目录
[root@k8s-master01 pki]# mkdir /etc/kubernetes/pki/etcd
[root@k8s-master01 pki]# ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now etcd
Created symlink /etc/systemd/system/etcd3.service → /usr/lib/systemd/system/etcd.service.
Created symlink /etc/systemd/system/multi-user.target.wants/etcd.service → /usr/lib/systemd/system/etcd.service.
查看etcd状态
[root@k8s-master01 pki]# etcdctl --endpoints="192.168.12.203:2379,192.168.12.202:2379,192.168.12.201:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
Etcd changelog：
https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_4.md
高可用配置
所有Master节点安装keepalived和haproxy
yum install keepalived haproxy -y
高可用配置
所有Master节点安装keepalived和haproxy
yum install keepalived haproxy -y
所有Master配置HAProxy
配置一样
mkdir /etc/haproxy/
[root@k8s-master01 pki]# cat /etc/haproxy/haproxy.cfg
global
maxconn 2000
ulimit-n 16384
log 127.0.0.1 local0 err
stats timeout 30s
defaults
log global
mode http
option httplog
timeout connect 5000
timeout client 50000
timeout server 50000
timeout http-request 15s
timeout http-keep-alive 15s
frontend k8s-master
bind 0.0.0.0:8443
bind 127.0.0.1:8443
mode tcp
option tcplog
tcp-request inspect-delay 5s
default_backend k8s-master
backend k8s-master
mode tcp
option tcplog
option tcp-check
balance roundrobin
default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
server k8s-master01 192.168.12.201:6443 check
server k8s-master02 192.168.12.202:6443 check
server k8s-master03 192.168.12.203:6443 check
所有Master节点配置KeepAlived，配置不一样，注意区分 [root@k8s-master01 pki]# vim /etc/keepalived/keepalived.conf ，注意每个节点的IP和网卡
master01
mkdir /etc/keepalived/
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 2
weight -5
fall 3
rise 2
}
vrrp_instance VI_1 {
state MASTER
interface ens33
mcast_src_ip 192.168.12.201
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.12.211
}
track_script {
chk_apiserver
} }
Master02
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 2
weight -5
fall 3
rise 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
mcast_src_ip 192.168.12.202
virtual_router_id 51
priority 90
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.12.211
}
track_script {
chk_apiserver
} }
Master03
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 2
weight -5
fall 3
rise 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
mcast_src_ip 192.168.12.203
virtual_router_id 51
priority 90
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
192.168.12.211
}
track_script {
chk_apiserver
} }
所有master节点健康检查配置
[root@k8s-master01 keepalived]# cat /etc/keepalived/check_apiserver.sh
#!/bin/bash
err=0
for k in $(seq 1 5)
do
check_code=$(curl -k -s https://127.0.0.1:6443/healthz)
if [[ $check_code != "ok" ]]; then
err=$(expr $err + 1)
sleep 5
continue
else
err=0
break
fi
done
if [[ $err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
启动HAProxy和KeepAlived
[root@k8s-master01 keepalived]# systemctl enable --now haproxy
[root@k8s-master01 keepalived]# systemctl enable --now keepalived
VIP测试
[root@k8s-master01 pki]# ping 192.168.12.211
PING 192.168.12.211 (192.168.12.211) 56(84) bytes of data.
64 bytes from 192.168.12.211: icmp_seq=1 ttl=64 time=1.39 ms
64 bytes from 192.168.12.211: icmp_seq=2 ttl=64 time=2.46 ms
64 bytes from 192.168.12.211: icmp_seq=3 ttl=64 time=1.68 ms
64 bytes from 192.168.12.211: icmp_seq=4 ttl=64 time=1.08 ms
kubernetes组件配置
所有节点创建相关目录
[root@k8s-master01 pki]# mkdir -p /etc/kubernetes/manifests/
/etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
kube-apiserver service
所有Master节点创建kube-apiserver service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \
--v=2 \
--logtostderr=true \
--allow-privileged=true \
--bind-address=0.0.0.0 \
--secure-port=6443 \
--insecure-port=0 \
--advertise-address=192.168.12.211 \
--service-cluster-ip-range=10.96.0.0/12 \
--service-node-port-range=30000-32767 \
--etcd-servers=https://192.168.12.201:2379,https://192.168.12.202:2379,https://192.168.12.203:2379 \
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
--etcd-certfile=/etc/etcd/ssl/etcd.pem \
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
--client-ca-file=/etc/kubernetes/pki/ca.pem \
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
--service-account-key-file=/etc/kubernetes/pki/sa.pub \
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
--authorization-mode=Node,RBAC \
--enable-bootstrap-token-auth=true \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
--requestheader-allowed-names=aggregator \
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \
--requestheader-username-headers=X-Remote-User
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
下面这一步目前不用配置
[root@k8s-master01 pki]# vim /etc/kubernetes/token.csv
[root@k8s-master01 pki]# cat !$
cat /etc/kubernetes/token.csv
d7d356746b508a1a478e49968fba7947,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
所有Master节点开启kube-apiserver
systemctl daemon-reload && systemctl enable --now kube-apiserver
检测kube-server状态
# systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2020-08-22 21:26:49 CST; 26s ago
kube-controller-manager service
所有Master节点配置kube-controller-manager service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
--v=2 \
--logtostderr=true \
--address=127.0.0.1 \
--root-ca-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
--leader-elect=true \
--use-service-account-credentials=true \
--node-monitor-grace-period=40s \
--node-monitor-period=5s \
--pod-eviction-timeout=2m0s \
--controllers=*,bootstrapsigner,tokencleaner \
--allocate-node-cidrs=true \
--cluster-cidr=10.244.0.0/16 \
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
--node-cidr-mask-size=24
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
所有Master节点启动kube-controller-manager
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now kube-controller-manager
Created symlink /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service → /usr/lib/systemd/system/kube-controller-manager.service.
kube-scheduler service
所有Master节点配置kube-scheduler service
[root@k8s-master01 pki]# cat /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \
--v=2 \
--logtostderr=true \
--address=127.0.0.1 \
--leader-elect=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
[root@k8s-master01 pki]# systemctl daemon-reload
[root@k8s-master01 pki]# systemctl enable --now kube-scheduler
Created symlink /etc/systemd/system/multi-user.target.wants/kube-scheduler.service → /usr/lib/systemd/system/kube-scheduler.service.
7、TLS Bootstrapping 配置
在Master01创建bootstrap
cd /root/k8s-ha-install/bootstrap
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.12.211:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
[root@k8s-master01 bootstrap]# cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
[root@k8s-master01 bootstrap]# kubectl create -f bootstrap.secret.yaml
secret/bootstrap-token-c8ad9c created
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-bootstrap created
clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-certificate-rotation created
clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created
clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created
8、node节点配置
复制证书至Node节点
[root@k8s-master01 bootstrap]# for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
ssh $NODE mkdir -p /etc/kubernetes/pki /etc/etcd/ssl /etc/etcd/ssl
for FILE in etcd-ca.pem etcd.pem etcd-key.pem; do
scp /etc/etcd/ssl/$FILE $NODE:/etc/etcd/ssl/
done
for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
done
done
etcd-ca.pem 100% 1363 314.0KB/s 00:00
etcd.pem 100% 1505 429.1KB/s 00:00
etcd-key.pem 100% 1679 361.9KB/s 00:00
ca.pem 100% 1407 459.5KB/s 00:00
ca-key.pem 100% 1679 475.2KB/s 00:00
front-proxy-ca.pem 100% 1143 214.5KB/s 00:00
bootstrap-kubelet.kubeconfig 100% 2291 695.1KB/s 00:00
etcd-ca.pem 100% 1363 325.5KB/s 00:00
etcd.pem 100% 1505 301.2KB/s 00:00
etcd-key.pem 100% 1679 260.9KB/s 00:00
ca.pem 100% 1407 420.8KB/s 00:00
ca-key.pem 100% 1679 398.0KB/s 00:00
front-proxy-ca.pem 100% 1143 224.9KB/s 00:00
bootstrap-kubelet.kubeconfig 100% 2291 685.4KB/s 00:00
kubelet service 配置
所有Node节点创建相关目录
mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/
所有节点配置kubelet service（Master节点不部署Pod也可无需配置）
[root@k8s-master01 bootstrap]# vim /usr/lib/systemd/system/kubelet.service
[root@k8s-master01 bootstrap]# cat !$
cat /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=docker.service
Requires=docker.service
[Service]
ExecStart=/usr/local/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
[root@k8s-master01 bootstrap]#
[root@k8s-master01 bootstrap]# cat !$
cat /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node='' "
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS
注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置
[root@k8s-master01 bootstrap]# vim /etc/kubernetes/kubelet-conf.yml
[root@k8s-master01 bootstrap]# cat !$
cat /etc/kubernetes/kubelet-conf.yml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
启动所有节点kubelet
systemctl daemon-reload
systemctl enable --now kubelet
此时系统日志/var/log/messages
Unable to update cni config: no networks found in /etc/cni/net.d 显示只有如下信息为正常
查看集群状态
[root@k8s-master01 bootstrap]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-master01 NotReady <none> 18s v1.19.0
k8s-master02 NotReady <none> 13s v1.19.0
k8s-master03 NotReady <none> 13s v1.19.0
k8s-node01 NotReady <none> 14s v1.19.0
k8s-node02 NotReady <none> 18s v1.19.0
Kube-Proxy配置
Kube-Proxy配置（Master01），如果更改了集群Pod的网段，需要更改kube-proxy/kube-proxy.conf的clusterCIDR: 10.244.0.0/16参数
cd /root/k8s-ha-install
kubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy
SECRET=$(kubectl -n kube-system get sa/kube-proxy \
--output=jsonpath='{.secrets[0].name}')
JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET \
--output=jsonpath='{.data.token}' | base64 -d)
PKI_DIR=/etc/kubernetes/pki
K8S_DIR=/etc/kubernetes
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.12.211:8443 --kubeconfig=${K8S_DIR}/kube-proxy.kubeconfig
kubectl config set-credentials kubernetes --token=${JWT_TOKEN} --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
赋值Service文件
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
scp ${K8S_DIR}/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done
[root@k8s-master01 k8s-ha-install]#
[root@k8s-master01 k8s-ha-install]# for NODE in k8s-node01 k8s-node02; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done
所有节点启动kube-proxy
[root@k8s-master01 k8s-ha-install]# systemctl daemon-reload
[root@k8s-master01 k8s-ha-install]# systemctl enable --now kube-proxy
Created symlink /etc/systemd/system/multi-user.target.wants/kube-proxy.service → /usr/lib/systemd/system/kube-proxy.service.
9、安装calico
Calico的安装请必须听视频课程和最后一章升级Calico的视频
安装最新版calico（master01 操作）
[root@k8s-master01 k8s-ha-install]# kubectl create -f Calico/calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
镜像下载速度可能会慢，使用kubectl get 查看po状态，系统Pod都在kube-system命名空间下
# kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-578894d4cd-n7tdw 1/1 Running 0 8h 10.244.122.132 k8s-master02 <none> <none>
calico-node-26wtv 1/1 Running 0 8h 192.168.0.204 k8s-node01 <none> <none>
calico-node-hqvp8 1/1 Running 0 8h 192.168.0.203 k8s-master03 <none> <none>
calico-node-m2jvj 1/1 Running 0 8h 192.168.0.205 k8s-node02 <none> <none>
calico-node-tkkn4 1/1 Running 0 8h 192.168.0.202 k8s-master02 <none> <none>
calico-node-whnhl 1/1 Running 0 85m 192.168.0.201 k8s-master01 <none> <none>
如果容器状态异常可以使用kubectl describe 或者logs查看容器的日志
kubectl describe po calico-node-5sddg -n kube-syste
kubectl logs -f calico-node-nhxh6 -n kube-system
10、安装CoreDNS
安装最新版的CoreDNS（master01 操作）
git clone https://github.com/coredns/deployment.git
cd deployment/kubernetes
# ./deploy.sh -s -i 10.96.0.10 | kubectl apply -f -
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
deployment.apps/coredns created
service/kube-dns created
查看状态
# kubectl get po -n kube-system -l k8s-app=kube-dns
NAME READY STATUS RESTARTS AGE
coredns-85b4878f78-h29kh 1/1 Running 0 8h
11、安装Metrics Server
# cd /root/k8s-ha-install/
# kubectl create -f metrics-server-0.3.7/
[root@k8s-master01 k8s-ha-install]# kubectl create -f metrics-server-0.3.7/
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
serviceaccount/metrics-server created
deployment.apps/metrics-server created
service/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
查看状态
[root@k8s-master01 k8s-ha-install]# kubectl get po -n kube-system -l k8s-app=metrics-server
NAME READY STATUS RESTARTS AGE
metrics-server-589847c86f-g2pl2 1/1 Running 0 32s
查看集群度量指标
[root@k8s-master01 k8s-ha-install]# kubectl top po -n kube-system
NAME CPU(cores) MEMORY(bytes)
calico-kube-controllers-7bbb89569d-prjgk 7m 23Mi
calico-node-47jbn 90m 58Mi
calico-node-ltk7h 70m 72Mi
calico-node-p2zjr 71m 69Mi
calico-node-s8w2z 75m 56Mi
calico-node-zwkk8 98m 63Mi
coredns-7c965f6585-t8cts 5m 25Mi
metrics-server-589847c86f-g2pl2 125m 31Mi
12、集群验证
集群验证请参考视频的集群验证，必须要做！！！
安装busybox
cat<<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: busybox:1.28
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF
-
Pod必须能解析Service
-
Pod必须能解析跨namespace的Service
-
每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53
-
Pod和Pod之前要能通
a) 同namespace能通信
b) 跨namespace能通信
c) 跨机器能通信
验证解析（请参考视频集群验证）
[root@k8s-master01 CoreDNS]# kubectl exec busybox -n default -- nslookup kubernetes
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
[root@k8s-master01 CoreDNS]# kubectl exec busybox -n default -- nslookup kube-dns.kube-system
Server: 10.96.0.10
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
Name: kube-dns.kube-system
Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
验证端口是否能通
yum -y install telnet
telnet 10.96.0.1 443
telnet 10.96.0.10 53
13、安装dashboard
Dashboard官方GitHub：https://github.com/kubernetes/dashboard
找到最新的安装文件：$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.4/aio/deploy/recommended.yaml
#cd k8s-ha-install
#kubectl create -f dashboard/
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
查看dashboard容器的状态：
[root@k8s-master01 k8s-ha-install]# kubectl get po -n kubernetes-dashboard
NAME READY STATUS RESTARTS AGE
dashboard-metrics-scraper-7b59f7d4df-2w9jj 1/1 Running 0 49s
kubernetes-dashboard-548f88599b-bdwvj 1/1 Running 0 50s
创建管理用户
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kube-system
查看token值
kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
eyJhbGciOiJSUzI1NiIsImtpZCI6IjdFeWZVanpNekhxVElHRW9DRldOR0pDaFhKNEVtS2xibHNmaGNoMDVIdncifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLTlqeHI5Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIzNmJiODRkOS0xMzcwLTRhNWEtYThkNS0yNDQ3OGNhOWE4ZDEiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.rJ0kzLWTgiwwfJApphCCYXNPIGdHaJe7gbt-p4gKaeyklEe37fI9DU6o7Cta-zdby5ifoYdJj4lksrvDnUjVSyzz3oxLxPJ_9HWybAm2c5OLw1wfNcDxYRuaG2Obe6yarTBP79E6EWDWMfYyYkCoQygHWMmj1w3gEaq77ZsiEahargBmzK_cZWGJoL0yeXbTuCCsaFmpQ2Jd9L0yuHDSxyt92zKxtoPX7zmRdkVUUVkjqysEGAyECb9W-aHS_AQ6PizSuzjHP9SeGo3Wtchh0Rydqae3dKK5Ut4zP4FqJvUM-MDd2cQbrvjm_AJUqdDsX3l01jYWa1Eh9b4c-NnTOA
访问Dashboard：https://192.168.12.200:30000，选择登录方式为令牌（即token方式）
查看所有的命名空间
kubectl get svc --all-namespaces
kuboard token值
eyJhbGciOiJSUzI1NiIsImtpZCI6IjdFeWZVanpNekhxVElHRW9DRldOR0pDaFhKNEVtS2xibHNmaGNoMDVIdncifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJrdWJvYXJkLXVzZXItdG9rZW4tc2w5OGciLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC5uYW1lIjoia3Vib2FyZC11c2VyIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQudWlkIjoiOGY2MDE5NjItOThlYi00OTRiLTliMzAtMTA4MDY2Njg2ODk4Iiwic3ViIjoic3lzdGVtOnNlcnZpY2VhY2NvdW50Omt1YmUtc3lzdGVtOmt1Ym9hcmQtdXNlciJ9.WE6M9fDKqqkjsMIyOLJ-sZbIdJs-xcMzALueB3JpOaPt_wQFO4ViZZacDnNjb2I_oSonb7at1TaSUkxP85FPYjEE82I41CGcBkKfj7fJN5i0KmnDPwGLvE6pwW2ymB6B62_vlgfnzyk1S-qEDQXqE8ZOyanD9aM8ivi_tNiE8TKncp52wkgECdsjMfScJu4mNPtwcV8htdo6qTszfM-PPGGq8YY0v1QTvjM29GoUozk5bJgS3Ucw3St8sAGw9J_6N-67krIBzI7-KyLkgvWAl2p3ZdXeeY4raFLE1gzKy_iDTyhpFmtVWcd7Z__6MIsD4FaT4mzWgGJ_8edJU5-OKQ
14、细节配置
Vim /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 5,
"log-opts": {
"max-size": "300m",
"max-file": "2"
},
"live-restore": true
}
vim /usr/lib/systemd/system/kube-controller-manager.service
--feature-gates=RotateKubeletClientCertificate=true,RotateKubeletServerCertificate=true \
--experimental-cluster-signing-duration=876000h0m0s \
vim /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--kubeconfig=/etc/kubernetes/kubelet.kubeconfig --allow-privileged=true --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --feature-gates=RotateKubeletClientCertificate=true,RotateKubeletServerCertificate=true --rotate-certificates"
Environment="KUBELET_SYSTEM_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--tls-cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --node-labels=node-role.kubernetes.io/node='' --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 --allowed-unsafe-sysctls=net.ipv4.*,net.core* --serialize-image-pulls=false --image-pull-progress-deadline=30m --enforce-node-allocatable=pods --kube-reserved=cpu=1,memory=1Gi,ephemeral-storage=10Gi --system-reserved=cpu=1,memory=1Gi,ephemeral-storage=10Gi --eviction-hard=memory.available<500Mi,nodefs.available<10%"
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS
##温馨提示：10-kubelet.conf在新版本的kubelet(>1.17.0)均推荐使用/etc/kubernetes/kubelet-conf.yml文件进行配置，所以上述配置更改为如下
Environment="KUBELET_EXTRA_ARGS=--tls-cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 --node-labels=node-role.kubernetes.io/node='' --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 --image-pull-progress-deadline=30m
##其余配置为kubelet-conf的配置，
vim /etc/kubernetes/kubelet-conf.yml
##配置如下：
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: cgroupfs
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
eventBurst: 10
eventRecordQPS: 5
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
# ...
featureGates:
EphemeralContainers: true
VolumeSnapshotDataSource: true
ExpandCSIVolumes: true
allowedUnsafeSysctls:
- "net.core*"
- "net.ipv4.*"
serializeImagePulls: false
enforceNodeAllocatable:
- pods
kubeReserved:
cpu: "1"
memory: 1Gi
ephemeral-storage: 10Gi
systemReserved:
cpu: "1"
memory: 1Gi
ephemeral-storage: 10Gi
evictionHard:
imagefs.available: 15%
memory.available: 500Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
安装总结：
1、kubeadm
2、二进制
3、自动化安装
a)Ansible
i.Master节点安装不需要写自动化。
ii.添加Node节点，playbook。
4、安装需要注意的细节
a)上面的细节配置
b)生产环境中etcd一定要和系统盘分开，一定要用ssd硬盘。
c)Docker数据盘也要和系统盘分开，有条件的话可以使用ssd硬盘
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