生产环境k8s平台规划

master节点

# master节点高可用集群至少2台，etcd集群必须为奇数（3台）
生产环境master和etcd公用3台机器
#配置推荐(测试、开发环境可适当降低配置4核8g即可)
8核16G
#关闭所有swap分区

node节点

# node>=2台
生产环境根据具体业务服务数，这里推荐2台
#配置推荐(测试、开发环境可适当降低配置4核8g即可)
8核16G
#关闭所有swap分区

安装前准备工作
- 部署过程以root用户完成
- 所有服务器网络互通，master1可以通过ssh证书免密登录到其他节点，用于分发文件

环境准备

软件	版本
操作系统	CentOS7.5_x64
Docker	19-ce
Kubernetes	1.18.2

服务器规划(测试环境)

hostname	ip	组件	机器配置
k8s-master1	192.168.1.106	kube-apiserver，kube-controller-manager，kube-scheduler，etcd	1c2g
k8s-master2	192.168.1.109	kube-apiserver，kube-controller-manager，kube-scheduler，etcd	1c2g
k8s-node1	192.168.1.182	kubelet，kube-proxy，docker，etcd	1c2g
k8s-node2	192.168.1.184	kubelet，kube-proxy，docker，etcd	1c2g
Load Balancer(master)	192.168.1.197	Nginx L4	1c2g
Load Balancer(backup)	192.168.1.199	Nginx L4	1c2g
vip	192.168.1.200

先部署一套单master集群，在扩容为多master

单master集群部署

单Master服务器规划：（master也可兼做为work节点）

hostname	ip	组件
k8s-master	192.168.1.106	kube-apiserver，kube-controller-manager，kube-scheduler，etcd
k8s-node1	192.168.1.182	kubelet，kube-proxy，docker etcd
k8s-node2	192.168.1.184	kubelet，kube-proxy，docker，etcd

初始化配置(所有节点)

关闭防火墙

systemctl stop firewalld
systemctl disable firewalld

关闭selinux

setenforce 0
sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

关闭swap分区

swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab

配置主机名
```
hostnamectl set-hostname <hostname>
```

节点生成ssh免密登陆(选择k8s-master1操作)

ssh-keygen -t rsa
for i in 192.168.1.{106,109,182,184} ;do ssh-copy-id -i .ssh/id_rsa.pub $i;done

编辑hosts文件

cat > /etc/hosts <<EOF
192.168.1.106 k8s-master1
192.168.1.109 k8s-master2
192.168.1.182 k8s-node1
192.168.1.184 k8s-node2
EOF

#分发到所有节点
for i in k8s-master{1,2};do scp -r /etc/hosts $i:/etc/hosts;done
for i in k8s-node{1,2};do scp -r /etc/hosts $i:/etc/hosts;done

所有节点同步时间

安装ntp
yum -y install ntp

同步时间
ntpdate pool.ntp.org

将ntp服务设为开机启动
chkconfig ntpd on

重启ntp服务
service ntpd restart

查看ntp服务状态
systemctl status ntpd

#同步时区和时间
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time.windows.com

优化内核参数

cat > kubernetes.conf <<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
net.ipv4.tcp_tw_recycle=0
net.ipv4.neigh.default.gc_thresh1=1024
net.ipv4.neigh.default.gc_thresh1=2048
net.ipv4.neigh.default.gc_thresh1=4096
vm.swappiness=0
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_instances=8192
fs.inotify.max_user_watches=1048576
fs.file-max=52706963
fs.nr_open=52706963
net.ipv6.conf.all.disable_ipv6=1
net.netfilter.nf_conntrack_max=2310720
EOF
cp kubernetes.conf  /etc/sysctl.d/kubernetes.conf
sysctl -p /etc/sysctl.d/kubernetes.conf

加载内核模块

modprobe ip_vs_rr
modprobe br_netfilter

安装依赖包
```
yum install -y epel-release
yum install -y chrony conntrack ipvsadm ipset jq iptables curl sysstat libseccomp wget socat git
```
- kube-proxy 使用 ipvs 模式，ipvsadm 为 ipvs 的管理工具
- etcd 集群各机器需要时间同步，chrony 用于系统时间同步；

升级内核

# 操作系统内核默认是3，在这里存在bug隐患 建议升级到4
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install -y kernel-lt
# 设置开机从新内核启动
grub2-set-default 0

# 重启机器
reboot
#验证内核是否升级
uname -r

生成cfssl证书生成工具

cfssl是一个开源的证书管理工具，使用json文件生成证书，相比openssl更方便使用。

找任意一台服务器操作，这里用Master节点。

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

部署ETCD集群

规划

Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。

节点hostname ip

etcd-1 192.168.1.106

etcd-2 192.168.1.182

etcd-3 192.168.1.184

注：为了节省机器，这里与K8s节点机器复用。也可以独立于k8s集群之外部署，只要apiserver能连接到就行。

节点hostname	ip
etcd-1	192.168.1.106
etcd-2	192.168.1.182
etcd-3	192.168.1.184

生成etcd证书

# 创建工作目录
mkdir -p ~/TLS/{etcd,k8s}

cd TLS/etcd

自签CA

cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json << EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

# 生成证书:
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
ls *pem
ca-key.pem  ca.pem

使用自签CA签发ETCD HTTPS证书

# 创建证书申请文件：
cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.1.106",
    "192.168.1.182",
    "192.168.1.184"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

# 生成证书：
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

ls server*pem
server-key.pem  server.pem

注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。

部署ETCD集群

# 以下在节点1上操作，为简化操作，待会将节点1生成的所有文件拷贝到节点2和节点3.

# 1. 创建工作目录并解压二进制包
wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz
mkdir /opt/etcd/{bin,cfg,ssl} -p
tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

# 2. 创建etcd配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.106:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.106:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.106:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.106:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.106:2380,etcd-2=https://192.168.1.182:2380,etcd-3=https://192.168.1.184:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

# 3. systemd管理etcd
cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF

# 4.拷贝刚才生成的证书
cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/

# 5. 启动并设置开机启动
systemctl daemon-reload
systemctl start etcd
systemctl enable etcd

# 启动时会卡住或失败，等待其他节点加入

# 6. 将上面节点1所有生成的文件拷贝到节点2和节点3
scp -r /opt/etcd/ k8s-node1:/opt/
scp /usr/lib/systemd/system/etcd.service k8s-node1:/usr/lib/systemd/system/
scp -r /opt/etcd/ k8s-node2:/opt/
scp /usr/lib/systemd/system/etcd.service k8s-node2:/usr/lib/systemd/system/

# 7. 然后在节点2和节点3分别修改etcd.conf配置文件中的节点名称和当前服务器IP：
vi /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME="etcd-2"   # 修改此处，节点2改为etcd-2，节点3改为etcd-3
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.182:2380"   # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.182:2379" # 修改此处为当前服务器IP

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.182:2380" # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.182:2379" # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.106:2380,etcd-2=https://192.168.1.182:2380,etcd-3=https://192.168.1.184:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

# 启动etcd并设置开机启动，同上。

# 8. 查看集群状态
ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.1.106:2379,https://192.168.1.182:2379,https://192.168.1.184:2379" endpoint health

# 如果输出上面信息，就说明集群部署成功。如果有问题第一步先看日志：/var/log/message 或 journalctl -u etcd

安装docker(所有节点)

# 下载地址
wget https://download.docker.com/linux/static/stable/x86_64/docker-19.03.12.tgz

# 以下在所有节点操作。这里采用二进制安装，用yum安装也一样。
tar zxvf docker-19.03.12.tgz
mv docker/* /usr/bin

# systemd管理docker
cat > /usr/lib/systemd/system/docker.service << EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOF

# 创建配置文件
mkdir /etc/docker
cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start docker
systemctl enable docker

部署master node

生成kube-apiserver证书

cd k8s
cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
cat > ca-csr.json << EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

# 生成证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

ls *pem
ca-key.pem  ca.pem

使用自签CA签发kube-apiserver HTTPS证书

cd TLS/k8s
cat > server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.1.106",
      "192.168.1.109",
      "192.168.1.182",
      "192.168.1.184",
      "192.168.1.197",
      "192.168.1.199",
      "192.168.1.200",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

# 注：上述文件hosts字段中IP为所有Master/LB/VIP IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

ls server*pem
server-key.pem  server.pem

下载二进制文件

# 下载地址
wget https://dl.k8s.io/v1.18.2/kubernetes-server-linux-amd64.tar.gz

# 解压二进制包
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs} 
tar zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin
ls kube-apiserver kube-scheduler kube-controller-manager
cp kube-apiserver kube-scheduler kube-controller-manager /opt/kubernetes/bin
cp kubectl /usr/bin/

部署kube-apiserver

# 创建配置文件
cat > /opt/kubernetes/cfg/kube-apiserver.conf << EOF
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--etcd-servers=https://192.168.1.106:2379,https://192.168.1.182:2379,https://192.168.1.184:2379 \\
--bind-address=192.168.1.106 \\
--secure-port=6443 \\
--advertise-address=192.168.1.106 \\
--allow-privileged=true \\
--service-cluster-ip-range=10.0.0.0/24 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=6000-32767 \\
--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \\
--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \\
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \\
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \\
--client-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--etcd-cafile=/opt/etcd/ssl/ca.pem \\
--etcd-certfile=/opt/etcd/ssl/server.pem \\
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
EOF

# 拷贝刚才生成的证书
ls ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem
cp ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem /opt/kubernetes/ssl/

# 创建配置文件中的token文件
cat > /opt/kubernetes/cfg/token.csv << EOF
c47ffb939f5ca36231d9e3121a252940,kubelet-bootstrap,10001,"system:node-bootstrapper"
EOF

# systemd管理apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-apiserver.conf
ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kube-apiserver
systemctl enable kube-apiserver

# 授权kubelet-bootstrap用户允许请求证书
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap

部署kube-controller-manager

# 创建配置文件
cat > /opt/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--leader-elect=true \\
--master=127.0.0.1:8080 \\
--bind-address=127.0.0.1 \\
--allocate-node-cidrs=true \\
--cluster-cidr=10.244.0.0/16 \\
--service-cluster-ip-range=10.0.0.0/24 \\
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem  \\
--root-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--experimental-cluster-signing-duration=87600h0m0s"
EOF

# systemd管理controller-manager
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kube-controller-manager
systemctl enable kube-controller-manager

部署kube-scheduler

# 创建配置文件
cat > /opt/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect \
--master=127.0.0.1:8080 \
--bind-address=127.0.0.1"
EOF

# systemd管理scheduler
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kube-scheduler
systemctl enable kube-scheduler

# 查看集群状态
kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}

# 这里有个小坑，执行kubectl命令时报错error: no configuration has been provided, try setting KUBERNETES_MASTER environment variable
解决方法： 
在/etc/profile末尾增加
export KUBERNETES_MASTER="127.0.0.1:8080"
source /etc/profile

部署worker node

# 下面还是在Master Node上操作，即同时作为Worker Node
# 创建工作目录并拷贝二进制文件,在所有worker node创建工作目录：
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}

# 从master节点拷贝
cd kubernetes/server/bin
cp kubelet kube-proxy /opt/kubernetes/bin

部署kubelet

# 创建配置文件
# 下载镜像
docker pull registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0

cat > /opt/kubernetes/cfg/kubelet.conf << EOF
KUBELET_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--hostname-override=k8s-master \\
--network-plugin=cni \\
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/opt/kubernetes/cfg/kubelet-config.yml \\
--cert-dir=/opt/kubernetes/ssl \\
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
EOF

# 配置参数文件
cat > /opt/kubernetes/cfg/kubelet-config.yml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local 
failSwapOn: false
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /opt/kubernetes/ssl/ca.pem 
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF

# 生成bootstrap.kubeconfig文件

KUBE_APISERVER="https://192.168.1.106:6443" # apiserver IP:PORT
TOKEN="c47ffb939f5ca36231d9e3121a252940" # 与token.csv里保持一致

# 生成 kubelet bootstrap kubeconfig 配置文件
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-credentials "kubelet-bootstrap" \
  --token=${TOKEN} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kubelet-bootstrap" \
  --kubeconfig=bootstrap.kubeconfig
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

# 拷贝到配置文件路径
ls -lt
cp bootstrap.kubeconfig /opt/kubernetes/cfg

# systemd管理kubelet
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet

# 批准kubelet证书申请并加入集群
kubectl get csr  # 查看kubelet证书请求
kubectl certificate approve node-csr-xxxxxxxxxx  # 批准申请
kubectl get node # 查看节点
[root@localhost bin]# kubectl get node
NAME         STATUS     ROLES    AGE   VERSION
k8s-master   NotReady   <none>   22s   v1.18.2
# 由于网络插件还没有部署，节点会没有准备就绪 NotReady

部署kube-proxy

#创建配置文件
cat > /opt/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"
EOF

# 配置参数文件
cat > /opt/kubernetes/cfg/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
  kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-master
clusterCIDR: 10.0.0.0/24
EOF

# 生成kube-proxy.kubeconfig文件
# 切换工作目录
cd TLS/k8s

# 创建证书请求文件
cat > kube-proxy-csr.json << EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

# 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

ls kube-proxy*pem
kube-proxy-key.pem  kube-proxy.pem

# 生成kubeconfig文件
KUBE_APISERVER="https://192.168.1.106:6443"

kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
  --client-certificate=./kube-proxy.pem \
  --client-key=./kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

# 拷贝到配置文件指定路径
cp kube-proxy.kubeconfig /opt/kubernetes/cfg/

# systemd管理kube-proxy
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kube-proxy
systemctl enable kube-proxy

部署CNI网络

wget https://github.com/containernetworking/plugins/releases/download/v0.8.6/cni-plugins-linux-amd64-v0.8.6.tgz

# 解压二进制包并移动到默认工作目录
mkdir -p /opt/cni/bin
tar zxvf cni-plugins-linux-amd64-v0.8.6.tgz -C /opt/cni/bin

# 部署CNI网络
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
sed -i -r "s#quay.io/coreos/flannel:.*-amd64#lizhenliang/flannel:v0.12.0-amd64#g" kube-flannel.yml

kubectl apply -f kube-flannel.yml

kubectl get pods -n kube-system
NAME                          READY   STATUS    RESTARTS   AGE
kube-flannel-ds-amd64-qsp5g   1/1     Running   0          22m

kubectl get node
NAME         STATUS   ROLES    AGE   VERSION
k8s-master   Ready    <none>   8h    v1.18.2

# 部署好网络插件，Node准备就绪
# 授权apiserver访问kubelet
cat > apiserver-to-kubelet-rbac.yaml << EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
      - pods/log
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kubernetes
EOF

kubectl apply -f apiserver-to-kubelet-rbac.yaml

增加worker node

# 拷贝已部署好的Node相关文件到新节点,182、184
scp -r /opt/kubernetes k8s-node1:/opt/

scp -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service k8s-node1:/usr/lib/systemd/system

scp -r /opt/cni/ k8s-node2:/opt/

scp /opt/kubernetes/ssl/ca.pem k8s-node2:/opt/kubernetes/ssl

# 删除kubelet证书和kubeconfig文件
rm /opt/kubernetes/cfg/kubelet.kubeconfig 
rm -f /opt/kubernetes/ssl/kubelet*

# 修改主机名
vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-node1

vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-node1

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet
systemctl start kube-proxy
systemctl enable kube-proxy

# 在Master上批准新Node kubelet证书申请
[root@localhost soft]# kubectl get csr
NAME                                                   AGE     SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-0JQgKZjXgkcc-khUhbPhZ1Hy6EFwCSQ88i4hccdP3aE   97s     kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-33FAfRfrbV9H1NO1AZ58Oby6kf3Ypb0Upu4qvxmZP2c   8h      kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Approved,Issued
node-csr-5FNWF-KN79zJPGzQLSpaZDx5KpsyHzkviu9ukZVhWgE   5m38s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-QZrb0f5UVaEguizqoWbc_kTaqtHxlEZtOEFngILmTYc   5m43s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-xIUJ6SsDPpVlWHdajRxR-TrqvqVXWLDvSnkrgp4ko3E   72s     kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending

[root@localhost soft]# kubectl certificate approve node-csr-0JQgKZjXgkcc-khUhbPhZ1Hy6EFwCSQ88i4hccdP3aE
certificatesigningrequest.certificates.k8s.io/node-csr-0JQgKZjXgkcc-khUhbPhZ1Hy6EFwCSQ88i4hccdP3aE approved
[root@localhost soft]# kubectl certificate approve node-csr-5FNWF-KN79zJPGzQLSpaZDx5KpsyHzkviu9ukZVhWgE
certificatesigningrequest.certificates.k8s.io/node-csr-5FNWF-KN79zJPGzQLSpaZDx5KpsyHzkviu9ukZVhWgE approved
[root@localhost soft]# kubectl certificate approve node-csr-QZrb0f5UVaEguizqoWbc_kTaqtHxlEZtOEFngILmTYc
certificatesigningrequest.certificates.k8s.io/node-csr-QZrb0f5UVaEguizqoWbc_kTaqtHxlEZtOEFngILmTYc approved
[root@localhost soft]#  kubectl certificate approve node-csr-xIUJ6SsDPpVlWHdajRxR-TrqvqVXWLDvSnkrgp4ko3E
certificatesigningrequest.certificates.k8s.io/node-csr-xIUJ6SsDPpVlWHdajRxR-TrqvqVXWLDvSnkrgp4ko3E approved

# 查看Node状态
kubectl get node
NAME         STATUS   ROLES    AGE     VERSION
k8s-master   Ready    <none>   8h      v1.18.2
k8s-node1    Ready    <none>   3m33s   v1.18.2
k8s-node2    Ready    <none>   2m8s    v1.18.2

部署Dashboard和CoreDNS

部署dashboard

wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml

# 默认Dashboard只能集群内部访问，修改Service为NodePort类型，暴露到外部
kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30000
  type: NodePort
  selector:
    k8s-app: kubernetes-dashboard
    
# 创建dashboard
kubectl apply -f kubernetes-dashboard.yaml

# 查看pod 、svc
kubectl get pods,svc -n kubernetes-dashboard

# 查看pod状态如果是runing即可以访问，通过node ip  ，https://192.168.1.106:30000

# 访问过程中如果谷歌浏览器出现如下提示: 您目前无法访问 yourname.com，因为此网站发送了 Google Chrome 无法处理的杂乱凭据。网络错误和攻击通常是暂时的

#  解决方法: 在当前页，直接键盘敲入 thisisunsafe

# 创建service account并绑定默认cluster-admin管理员集群角色
kubectl create serviceaccount dashboard-admin -n kube-system

kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin

# 查看token
kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')

部署coreDNS

# CoreDNS用于集群内部Service名称解析。DNS服务监视Kubernetes API，为每一个Service创建DNS记录用于域名解析。

# 获取地址 ： https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/coredns/coredns.yaml.base
vim coredns.yaml
# 修改镜像
docker pull registry.aliyuncs.com/google_containers/coredns:1.6.7

# 修改yaml文件
70行左右   kubernetes cluster.local {  	-->大写部分修改成自己的域  一般为 cluster.local.
135行左右	image: coredns/coredns:1.7.0 	-->image部分墙外的需要修改，coredns/coredns:1.3.1
140行左右	memory: 170Mi 		 			-->修改成自己适合的值，我这里修改为 170Mi
200行左右	clusterIP: 10.0.0.2				--> clusterIP 修改成kubelet.config中设置的clusterDNS IP

PS: 结合官方模版修改,比如内存,image镜像地址,版本号
https://github.com/coredns/deployment/blob/master/kubernetes/coredns.yaml.sed

比如我kubectl create -f coredns.yaml时候报错
error: error validating "coredns.yaml": error validating data: ValidationError(Deployment.spec.template.spec.securityContext): unknown field "seccompProfile" in io.k8s.api.core.v1.PodSecurityContext; if you choose to ignore these errors, turn validation off with --validate=false
查看报错信息,问题出在seccompProfile字段,结合官方模版对比,官方模版里已经没有这个字段了,所以删除即可
#      securityContext:
#        seccompProfile:
#          type: RuntimeDefault

# 创建coredns
kubectl apply -f coredns.yaml

# DNS解析测试
kubectl run -it --rm dns-test --image=busybox:1.28.4 sh
If you don't see a command prompt, try pressing enter.

/ # nslookup kubernetes
Server:    10.0.0.2
Address 1: 10.0.0.2 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes
Address 1: 10.0.0.1 kubernetes.default.svc.cluster.local

高可用(扩容多master架构)

具体想了解架构原理可参考文章开头的文档，记载很详细

安装docker(192.168.1.109)

同上，不再赘述

部署master2 node(192.168.1.109）

#  Master2 与已部署的Master1所有操作一致。所以我们只需将Master1所有K8s文件拷贝过来，再修改下服务器IP和主机名启动即可。

# 在Master2创建etcd证书目录
mkdir -p /opt/etcd/ssl

# 拷贝Master1上所有K8s文件和etcd证书到Master2
scp -r /opt/kubernetes k8s-master2:/opt
scp -r /opt/cni/ k8s-master2:/opt
scp -r /opt/etcd/ssl k8s-master2:/opt/etcd
scp /usr/lib/systemd/system/kube* k8s-master2:/usr/lib/systemd/system
scp /usr/bin/kubectl  k8s-master2:/usr/bin

# 删除kubelet证书和kubeconfig文件：（Master2操作)
rm -f /opt/kubernetes/ssl/kubelet*
rm -f /opt/kubernetes/cfg/kubelet.kubeconfig

# 修改apiserver、kubelet和kube-proxy配置文件为本地IP：（Master2操作）
vi /opt/kubernetes/cfg/kube-apiserver.conf 
...
--bind-address=192.168.1.109 \
--advertise-address=192.168.1.109 \
...

vi /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-master2

vi /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-master2

# 启动设置开机启动
systemctl daemon-reload
systemctl start kube-apiserver
systemctl start kube-controller-manager
systemctl start kube-scheduler
systemctl start kubelet
systemctl start kube-proxy
systemctl enable kube-apiserver
systemctl enable kube-controller-manager
systemctl enable kube-scheduler
systemctl enable kubelet
systemctl enable kube-proxy

# 这里对master2节点修改在/etc/profile末尾增加
export KUBERNETES_MASTER="127.0.0.1:8080"
source /etc/profile

# 查看集群状态
kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-2               Healthy   {"health":"true"}
etcd-1               Healthy   {"health":"true"}
etcd-0               Healthy   {"health":"true"}

# 批准kubelet证书申请
kubectl get csr
kubectl certificate approve node-csr-xxxx

kubectl get node
NAME          STATUS   ROLES    AGE    VERSION
k8s-master    Ready    <none>   31h    v1.18.2
k8s-master2   Ready    <none>   111s   v1.18.2
k8s-node1     Ready    <none>   23h    v1.18.2
k8s-node2     Ready    <none>   23h    v1.18.2

部署nginx负载均衡器

安装软件包（主/备）

 yum install epel-release -y
 yum install nginx keepalived -y

Nginx配置文件（主/备一样）

cat > /etc/nginx/nginx.conf << "EOF"
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

# 四层负载均衡，为两台Master apiserver组件提供负载均衡
stream {

    log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';

    access_log  /var/log/nginx/k8s-access.log  main;

    upstream k8s-apiserver {
       server 192.168.1.106:6443;   # Master1 APISERVER IP:PORT
       server 192.168.1.109:6443;   # Master2 APISERVER IP:PORT
    }
    
    server {
       listen 6443;
       proxy_pass k8s-apiserver;
    }
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    server {
        listen       80 default_server;
        server_name  _;

        location / {
        }
    }
}
EOF

keepalived配置文件（Nginx Master）

# 配置VIP：192.168.1.200
cat > /etc/keepalived/keepalived.conf << EOF
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id NGINX_MASTER
   script_user root
   enable_script_security
}

vrrp_script check_nginx {
    script "/etc/keepalived/check_nginx.sh"
}

vrrp_instance VI_1 {
    state MASTER
    interface ens192
    virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
    priority 100    # 优先级，备服务器设置 90
    advert_int 1    # 指定VRRP 心跳包通告间隔时间，默认1秒
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    # 虚拟IP
    virtual_ipaddress {
        192.168.1.200/24
    }
    track_script {
        check_nginx
    }
}
EOF

# 上述配置文件中检查nginx运行状态脚本
cat > /etc/keepalived/check_nginx.sh  << "EOF"
#!/bin/bash
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then
    exit 1
else
    exit 0
fi
EOF
chmod +x /etc/keepalived/check_nginx.sh

keepalived配置文件（Nginx Backup）

cat > /etc/keepalived/keepalived.conf << EOF
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id NGINX_BACKUP
   script_user root
   enable_script_security
}

vrrp_script check_nginx {
    script "/etc/keepalived/check_nginx.sh"
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens192
    virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.200/24
    }
    track_script {
        check_nginx
    }
}
EOF

# 上述配置文件中检查nginx运行状态脚本
cat > /etc/keepalived/check_nginx.sh  << "EOF"
#!/bin/bash
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then
    exit 1
else
    exit 0
fi
EOF
chmod +x /etc/keepalived/check_nginx.sh

# 启动并设置开机启动
systemctl daemon-reload
systemctl start nginx
systemctl start keepalived
systemctl enable nginx
systemctl enable keepalived

# 查看keepalived工作状态
systemctl status keepalived

Nginx+Keepalived高可用测试

# 关闭主节点Nginx，测试VIP是否漂移到备节点服务器
pkill nginx

# 测试另外一台主机ip

# 访问负载均衡器测试，找K8s集群中任意一个节点，使用curl查看K8s版本测试，使用VIP访问
curl -k https://192.168.1.200:6443/version

修改所有worker node连接lb vip

# 所有Worker Node执行
grep 192.168.1.106:6443 /opt/kubernetes/cfg/*
sed -i 's#192.168.1.106:6443#192.168.1.200:6443#' /opt/kubernetes/cfg/*
grep 192.168.1.200:6443 /opt/kubernetes/cfg/*
systemctl restart kubelet
systemctl restart kube-proxy

kube-proxy修改成ipvs模式

安装ipset及ipvsadm(所有节点)

yum -y install ipset ipvsadm
yum install ipvsadm ipset sysstat conntrack libseccomp -y  #上面安装有问题时用这个

添加需要加载的模块(所有节点)

cat >/etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF

# 授权、运行、检查是否加载
chmod 755 /etc/sysconfig/modules/ipvs.modules && sh /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

# 检查是否加载
lsmod | grep -e ipvs -e nf_conntrack_ipv4

# 修改Kube-proxy配置文件kube-proxy-config.yml将mode设置为ipvs
vi /opt/kubernetes/cfg/kube-proxy-config.yml
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-master2
clusterCIDR: 10.0.0.0/24
mode: "ipvs"
ipvs: 
  scheduler: "rr"
  
# 重启服务及验证
systemctl daemon-reload 
systemctl restart kube-proxy 
systemctl status kube-proxy
ipvsadm -L -n

# 所有机器需要设定/etc/sysctl.d/k8s.conf的系统参数
cat <<EOF > /etc/sysctl.d/k8s.conf
# https://github.com/moby/moby/issues/31208 
# ipvsadm -l --timout
# 修复ipvs模式下长连接timeout问题 小于900即可
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 10
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv4.neigh.default.gc_stale_time = 120
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_announce = 2
net.ipv4.ip_forward = 1
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_synack_retries = 2
# 要求iptables不对bridge的数据进行处理
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-arptables = 1
net.netfilter.nf_conntrack_max = 2310720
fs.inotify.max_user_watches=89100
fs.may_detach_mounts = 1
fs.file-max = 52706963
fs.nr_open = 52706963
vm.swappiness = 0
vm.overcommit_memory=1
vm.panic_on_oom=0
EOF

posted on 2021-01-14 18:23 猛风中碰杯阅读(496) 评论(0) 收藏举报

生产环境二进制高可用部署kubernetes集群

生产环境k8s平台规划

环境准备

服务器规划(测试环境)

先部署一套单master集群，在扩容为多master

单master集群部署

初始化配置(所有节点)

生成cfssl证书生成工具

部署ETCD集群

安装docker(所有节点)

部署master node

使用自签CA签发kube-apiserver HTTPS证书

部署kube-apiserver

部署worker node

部署Dashboard和CoreDNS

高可用(扩容多master架构)

安装docker(192.168.1.109)

部署master2 node(192.168.1.109）

部署nginx负载均衡器

安装软件包（主/备）

Nginx配置文件（主/备一样）

keepalived配置文件（Nginx Master）

keepalived配置文件（Nginx Backup）

Nginx+Keepalived高可用测试

kube-proxy修改成ipvs模式