5. 安装k8s的master节点和worker节点
B站视频地址: 5.1k8s-搭建master节点_哔哩哔哩 (゜-゜)つロ 干杯~-bilibili
- 复制init镜像->master
- master改hostname主机名
- master改ip
k8s-搭建篇
- k8s v1.15.0,后续可以升级v1.15.5 , v1.15.5是安全版
- master
- 2G内存
- 2核CPU
- Linux 内核 版本 >= 3.10.0-957.el7.x86_64; 现在版本3.10.0-1062.9.1.el7
- worker
- 默认内核 3.10.0-957.el7.x86_64
- 2核
- 2G
搭建方式
- kubeadm v1.15.0
安装组件
适合初次安装
# 安装kubelet kubeadm kubectl
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum install kubeadm-1.15.0 kubectl-1.15.0 kubelet-1.15.0 # 安装组件
# 拉取国内镜像
MY_REGISTRY=suveng
echo '============docker pull=========='
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-apiserver:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-scheduler:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-controller-manager:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-proxy:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-etcd:3.3.10
docker pull ${MY_REGISTRY}/k8s.gcr.io-pause:3.1
docker pull ${MY_REGISTRY}/k8s.gcr.io-coredns:1.3.1
echo '============docker pull over=========='
echo '============docker tag=========='
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-apiserver:v1.15.0 k8s.gcr.io/kube-apiserver:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-scheduler:v1.15.0 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-controller-manager:v1.15.0 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-proxy:v1.15.0 k8s.gcr.io/kube-proxy:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-etcd:3.3.10 k8s.gcr.io/etcd:3.3.10
docker tag ${MY_REGISTRY}/k8s.gcr.io-pause:3.1 k8s.gcr.io/pause:3.1
docker tag ${MY_REGISTRY}/k8s.gcr.io-coredns:1.3.1 k8s.gcr.io/coredns:1.3.1
echo '============docker tag over=========='
# 启动kublet,并开机自启动
systemctl start kubelet
systemctl enable kubelet
# centos7用户还需要设置路由
yum install -y bridge-utils.x86_64
# 加载br_netfilter模块，使用lsmod查看开启的模块
modprobe br_netfilter
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
# 重新加载所有配置文件
sysctl --system
# k8s要求关闭swap (qxl)
swapoff -a && sysctl -w vm.swappiness=0 # 关闭swap
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab # 取消开机挂载swap
# master节点初始化
kubeadm init --apiserver-advertise-address 192.168.0.201 --pod-network-cidr 10.11.0.0/16 --kubernetes-version 1.15.0
# 初始化完配置kubectl环境
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
# 保存打印出来的下面的提示,用于初始化worker节点, 复制自己的, 不是复制这篇文章的
kubeadm join 192.168.0.201:6443 --token fcfxdo.u86c10mkxuq9gpgz \
--discovery-token-ca-cert-hash sha256:8f74baa14261465c7361e6fe4de1ebf7941208749360edeea1557ccc71ec2186
# 配置网络,应用flannel网络
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
# 检测master节点
kubectl get node
# 查看kubelet的日志
journalctl -fu kubelet
初始化worker节点
# 安装kubelet kubeadm kubectl
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum install kubeadm-1.15.0 kubectl-1.15.0 kubelet-1.15.0 # 安装组件
# 自启
systemctl enable kubelet
systemctl start kubelet
# centos7用户还需要设置路由
yum install -y bridge-utils.x86_64
# 加载br_netfilter模块，使用lsmod查看开启的模块
modprobe br_netfilter
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
# 重新加载所有配置文件
sysctl --system
# k8s要求关闭swap (qxl)
swapoff -a && sysctl -w vm.swappiness=0 # 关闭swap
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab # 取消开机挂载swap
#拉取镜像
MY_REGISTRY=suveng
echo '============docker pull=========='
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-apiserver:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-scheduler:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-controller-manager:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-kube-proxy:v1.15.0
docker pull ${MY_REGISTRY}/k8s.gcr.io-etcd:3.3.10
docker pull ${MY_REGISTRY}/k8s.gcr.io-pause:3.1
docker pull ${MY_REGISTRY}/k8s.gcr.io-coredns:1.3.1
echo '============docker pull over=========='
echo '============docker tag=========='
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-apiserver:v1.15.0 k8s.gcr.io/kube-apiserver:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-scheduler:v1.15.0 k8s.gcr.io/kube-scheduler:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-controller-manager:v1.15.0 k8s.gcr.io/kube-controller-manager:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-kube-proxy:v1.15.0 k8s.gcr.io/kube-proxy:v1.15.0
docker tag ${MY_REGISTRY}/k8s.gcr.io-etcd:3.3.10 k8s.gcr.io/etcd:3.3.10
docker tag ${MY_REGISTRY}/k8s.gcr.io-pause:3.1 k8s.gcr.io/pause:3.1
docker tag ${MY_REGISTRY}/k8s.gcr.io-coredns:1.3.1 k8s.gcr.io/coredns:1.3.1
echo '============docker tag over=========='
# 加入master
# 这里使用master初始化完之后提示的命令
kubeadm join 192.168.0.201:6443 --token 0gfmh8.wcwa31l1v9shmcjq \
--discovery-token-ca-cert-hash sha256:8082ae1a748672c6767132397b4d13e5ee5d94d5096fcfe46f00775670b513a1
重复安装需要,清除k8s环境
kubeadm reset --ignore-preflight-errors=Swap
rm -rf /var/lib/kubelet/
rm -rf /var/lib/cni/
rm -rf /var/lib/etcd/
rm -rf /etc/kubernetes/
rm -rf /root/.kube/config
worker加入master的命令
kubeadm join 192.168.0.201:6443 --token 0gfmh8.wcwa31l1v9shmcjq
–discovery-token-ca-cert-hash sha256:8082ae1a748672c6767132397b4d13e5ee5d94d5096fcfe46f00775670b513a1
资料,很好的教程
