Kubernetes K8s集群搭建

全部机器

预配置

分别重命名

hostnamectl set-hostname master
hostnamectl set-hostname node1
hostnamectl set-hostname node2

网络配置

cat <<EOF >>/etc/hosts
192.168.120.130 master
192.168.120.131 node1
192.168.120.132 node2
EOF

开始配置

systemctl disable firewalld
systemctl stop firewalld

setenforce 0
sed -i 's/enforcing/disabled/' /etc/selinux/config

swapoff -a
sed -i 's/.*swap.*/#&/' /etc/fstab

cat <<EOF >> kubernetes.conf
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
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
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
cp kubernetes.conf /etc/sysctl.d/kubernetes.conf
sysctl -p /etc/sysctl.d/kubernetes.conf

ulimit -SHn 65535

cat <<EOF >> /etc/security/limits.conf
soft nofile 655360
hard nofile 131072
soft nproc 655350
hard nproc 655350
soft memlock unlimited
hard memlock unlimited
EOF

安装docker

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache

yum install -y docker-ce-18.09.9 docker-ce-cli-18.09.9 containerd.io
systemctl enable docker && systemctl start docker

cat <<EOF >  /etc/docker/daemon.json
{
  "registry-mirrors": [
    "https://uy35zvn6.mirror.aliyuncs.com",
    "https://b9pmyelo.mirror.aliyuncs.com",
    "https://rpl65fpf.mirror.aliyuncs.com",
    "https://docker.1panel.live",
    "https://dockerhub.icu",
    "https://dockerpull.org",
    "https://docker.1panel.dev",
    "https://docker.foreverlink.love",
    "https://docker.fxxk.dedyn.io",
    "https://docker.xn--6oq72ry9d5zx.cn",
    "https://docker.zhai.cm",
    "https://docker.5z5f.com",
    "https://a.ussh.net",
    "https://docker.cloudlayer.icu",
    "https://hub.littlediary.cn",
    "https://hub.crdz.gq",
    "https://docker.unsee.tech",
    "https://docker.kejilion.pro",
    "https://registry.dockermirror.com",
    "https://hub.rat.dev",
    "https://dhub.kubesre.xyz",
    "https://docker.nastool.de",
    "https://docker.udayun.com",
    "https://docker.rainbond.cc",
    "https://hub.geekery.cn",
    "https://docker.1panelproxy.com",
    "https://atomhub.openatom.cn",
    "https://docker.m.daocloud.io",
    "https://docker.1ms.run",
    "https://docker.linkedbus.com",
    "https://dytt.online",
    "https://func.ink",
    "https://lispy.org",
    "https://docker.xiaogenban1993.com"
  ],
  "exec-opts":["native.cgroupdriver=systemd"],
    "log-driver":"json-file",
    "log-opts":{
        "max-size":"100m"
    }
}
EOF

systemctl daemon-reload && systemctl restart docker && systemctl enable docker

部署kub集群

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

setenforce 0

安装kubectl、kubeadm、kubelet

yum install -y kubectl-1.16.0-0 kubeadm-1.16.0-0 kubelet-1.16.0-0
systemctl enable kubelet && systemctl start kubelet

maste节点

初始化master节点

kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.16.0 --apiserver-advertise-address 192.168.120.130 --pod-network-cidr=10.244.0.0/16 --token-ttl 0

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

获取加入集群指令

kubeadm token create --print-join-command

安装 calico 网络插件

yum install wget
wget https://kuboard.cn/install-script/calico/calico-3.9.2.yaml
export POD_SUBNET=10.244.0.0/16
sed -i "s#192\.168\.0\.0/16#${POD_SUBNET}#" calico-3.9.2.yaml
kubectl apply -f calico-3.9.2.yaml

安装flannel插件

wget https://github.com/flannel-io/flannel/releases/download/v0.24.3/kube-flannel.yml
kubectl apply -f kube-flannel.yml

master节点服务器上执行此命令

scp /etc/kubernetes/admin.conf 192.168.120.131:/etc/kubernetes/admin.conf
scp /etc/kubernetes/admin.conf 192.168.120.132:/etc/kubernetes/admin.conf

nodes节点设置kubeconfig文件

export KUBECONFIG=/etc/kubernetes/admin.conf
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile

node节点

执行前面获取的加入集群指令即可