Kubernetes-V1.14.2 二进制编译安装部署(node节点篇)

进行node节点安装部署

Leorizon

3.6.1 复制二进制包

cd ../kubernetes/server/bin/
cp kubelet kube-proxy /app/kubernetes/bin/
scp kubelet kube-proxy k8s-node-1:/app/kubernetes/bin/
scp kubelet kube-proxy k8s-node-2:/app/kubernetes/bin/

3.6.2 创建角色绑定

kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper --user=kubelet-bootstrap

3.6.3 创建 kubelet bootstrapping kubeconfig 文件

设置集群参数

kubectl config set-cluster kubernetes \
   --certificate-authority=/app/kubernetes/ssl/ca.pem \
   --embed-certs=true \
   --server=https://192.168.189.139:6443 \
   --kubeconfig=bootstrap.kubeconfig

设置客户端认证参数

kubectl config set-credentials kubelet-bootstrap \
   --token=8fa4488b7751e2ba9f58555a8cb0cef4 \
   --kubeconfig=bootstrap.kubeconfig

### 注意::--token的参数为上篇中的kube-apiserver 
###         使用的客户端 token 文件中的那个token

设置上下文参数

 kubectl config set-context default \
   --cluster=kubernetes \
   --user=kubelet-bootstrap \
   --kubeconfig=bootstrap.kubeconfig

选择默认上下文

kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

scp bootstrap.kubeconfig /app/kubernetes/cfg/
scp bootstrap.kubeconfig k8s-node-1:/app/kubernetes/cfg/                                            
scp bootstrap.kubeconfig k8s-node-2:/app/kubernetes/cfg/

3.6.4 部署kubelet

# 设置CNI支持
mkdir -p /etc/cni/net.d
vim /etc/cni/net.d/10-default.conf
{
    "name": "flannel",
    "type": "flannel",
    "delegate": {
        "bridge": "docker0",
        "isDefaultGateway": true,
        "mtu": 1400
    }
}
 
# 创建kubelet目录
mkdir /var/lib/kubelet

创建kubelet启动服务配置

vim /usr/lib/systemd/system/kubelet.service

[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service

[Service]
WorkingDirectory=/var/lib/kubelet
ExecStart=/app/kubernetes/bin/kubelet \
  --address=192.168.189.139 \
  --hostname-override=192.168.189.139 \
  --pod-infra-container-image=mirrorgooglecontainers/pause-amd64:3.0 \
  --experimental-bootstrap-kubeconfig=/app/kubernetes/cfg/bootstrap.kubeconfig \
  --kubeconfig=/app/kubernetes/cfg/kubelet.kubeconfig \
  --cert-dir=/app/kubernetes/ssl \
  --network-plugin=cni \
  --cni-conf-dir=/etc/cni/net.d \
  --cni-bin-dir=/app/kubernetes/bin/cni \
  --cluster-dns=10.1.0.2 \
  --cluster-domain=cluster.local. \
  --hairpin-mode hairpin-veth \
  --allow-privileged=true \
  --fail-swap-on=false \
  --logtostderr=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/app/kubernetes/log
Restart=on-failure
RestartSec=5

启动服务

systemctl daemon-reload
systemctl enable kubelet && systemctl start kubelet
systemctl status kubelet

在其他机器上创建下面2个文件夹

mkdir -p /etc/cni/net.d
mkdir /var/lib/kubelet

在主节点使用下面命令分发

scp /etc/cni/net.d/10-default.conf k8s-node-1:/etc/cni/net.d/10-default.conf
scp /etc/cni/net.d/10-default.conf k8s-node-2:/etc/cni/net.d/10-default.conf

下面2个文件要去对应机器修改IP

scp /usr/lib/systemd/system/kubelet.service \
k8s-node-1:/usr/lib/systemd/system/kubelet.service

scp /usr/lib/systemd/system/kubelet.service \
k8s-node-2:/usr/lib/systemd/system/kubelet.service

# 使用下面的命令,里面的两个IP都改为当前IP
vim /usr/lib/systemd/system/kubelet.service

在各个机器启动服务

systemctl daemon-reload
systemctl enable kubelet && systemctl start kubelet
systemctl status kubelet

查看csr请求

kubectl get csr

结果如下:

[root@k8s-master bin]# kubectl get csr
NAME                    AGE    REQUESTOR           CONDITION
node-csr-M7NH4jxhj...   8m4s   kubelet-bootstrap   Pending
node-csr-XjMnA02kn...   30s    kubelet-bootstrap   Pending
node-csr-uIqmVSeTF...   26s    kubelet-bootstrap   Pending

通过kubelet 的 TLS 证书请求

kubectl get csr|grep 'Pending' | awk 'NR>0{print $1}'| xargs \
kubectl certificate approve

kubectl get node

3.6.5 部署kube-proxy

配置kube-proxy使用LVS

yum install -y ipvsadm ipset conntrack

创建 kube-proxy 证书请求

vim kube-proxy-csr.json
 
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}

生成证书

cfssl gencert -ca=/app/kubernetes/ssl/ca.pem \
   -ca-key=/app/kubernetes/ssl/ca-key.pem \
   -config=/app/kubernetes/ssl/ca-config.json \
   -profile=kubernetes  kube-proxy-csr.json | cfssljson -bare kube-proxy

复制证书到所有node节点

cp kube-proxy*.pem /app/kubernetes/ssl/
scp kube-proxy*.pem k8s-node-1:/app/kubernetes/ssl/
scp kube-proxy*.pem k8s-node-2:/app/kubernetes/ssl/

创建kube-proxy配置文件

kubectl config set-cluster kubernetes \
   --certificate-authority=/app/kubernetes/ssl/ca.pem \
   --embed-certs=true \
   --server=https://192.168.189.139:6443 \
   --kubeconfig=kube-proxy.kubeconfig
   
kubectl config set-credentials kube-proxy \
   --client-certificate=/app/kubernetes/ssl/kube-proxy.pem \
   --client-key=/app/kubernetes/ssl/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

分发kubeconfig配置文件

scp kube-proxy.kubeconfig /app/kubernetes/cfg/
scp kube-proxy.kubeconfig k8s-node-1:/app/kubernetes/cfg/
scp kube-proxy.kubeconfig k8s-node-2:/app/kubernetes/cfg/

配置启动服务

#各节点都执行 并修改对应IP

mkdir /var/lib/kube-proxy

创建 kube-proxy.service

vim /usr/lib/systemd/system/kube-proxy.service

[Unit]
Description=Kubernetes Kube-Proxy Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
 
[Service]
WorkingDirectory=/var/lib/kube-proxy
ExecStart=/app/kubernetes/bin/kube-proxy \
  --bind-address=192.168.189.139 \
  --hostname-override=192.168.189.139 \
  --kubeconfig=/app/kubernetes/cfg/kube-proxy.kubeconfig \
--masquerade-all \
  --feature-gates=SupportIPVSProxyMode=true \
  --proxy-mode=ipvs \
  --ipvs-min-sync-period=5s \
  --ipvs-sync-period=5s \
  --ipvs-scheduler=rr \
  --logtostderr=true \
  --v=2 \
  --logtostderr=false \
  --log-dir=/app/kubernetes/log
 
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
 
[Install]
WantedBy=multi-user.target

同步到其他节点

scp /usr/lib/systemd/system/kube-proxy.service \
k8s-node-1:/usr/lib/systemd/system/

scp /usr/lib/systemd/system/kube-proxy.service \
k8s-node-2:/usr/lib/systemd/system/

修改kube-proxy.service中的IP
vim /usr/lib/systemd/system/kube-proxy.service

各节点都启动服务

systemctl daemon-reload
systemctl enable kube-proxy && systemctl start kube-proxy
systemctl status kube-proxy

3.7 配置flannel网络

3.7.1 生成flannel证书

vim flanneld-csr.json

{
  "CN": "flanneld",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}

3.7.2 生成证书

cfssl gencert -ca=/app/kubernetes/ssl/ca.pem \
   -ca-key=/app/kubernetes/ssl/ca-key.pem \
   -config=/app/kubernetes/ssl/ca-config.json \
   -profile=kubernetes flanneld-csr.json | cfssljson -bare flanneld

3.7.3 分发证书

cp flanneld*.pem /app/kubernetes/ssl/
scp flanneld*.pem k8s-node-1:/app/kubernetes/ssl/
scp flanneld*.pem k8s-node-2:/app/kubernetes/ssl/

3.7.4 下载Flannel软件包相关软件包

wget https://github.com/coreos/flannel/releases/download/v0.11.0/\
flannel-v0.11.0-linux-amd64.tar.gz
tar xf flannel-v0.11.0-linux-amd64.tar.gz
cd flannel-v0.11.0-linux-amd64/
cp flanneld mk-docker-opts.sh /app/kubernetes/bin/
scp flanneld mk-docker-opts.sh k8s-node-1:/app/kubernetes/bin/
scp flanneld mk-docker-opts.sh k8s-node-2:/app/kubernetes/bin/
wget https://github.com/kubernetes/kubernetes/releases/download/v1.14.2/\
kubernetes.tar.gz
tar xf kubernetes.tar.gz && cd kubernetes/cluster/centos/node/bin
cp remove-docker0.sh /app/kubernetes/bin/
scp remove-docker0.sh k8s-node-1:/app/kubernetes/bin/
scp remove-docker0.sh k8s-node-2:/app/kubernetes/bin/

3.7.5 配置flannel

vim /app/kubernetes/cfg/flannel

FLANNEL_ETCD="-etcd-endpoints=https://192.168.189.139:2379,
https://192.168.189.131:2379,https://192.168.189.132:2379"
FLANNEL_ETCD_KEY="-etcd-prefix=/kubernetes/network"
FLANNEL_ETCD_CAFILE="--etcd-cafile=/app/kubernetes/ssl/ca.pem"
FLANNEL_ETCD_CERTFILE="--etcd-certfile=/app/kubernetes/ssl/flanneld.pem"
FLANNEL_ETCD_KEYFILE="--etcd-keyfile=/app/kubernetes/ssl/flanneld-key.pem"

同步到其他节点

scp /app/kubernetes/cfg/flannel k8s-node-1:/app/kubernetes/cfg
scp /app/kubernetes/cfg/flannel k8s-node-2:/app/kubernetes/cfg

3.7.6 设置Flannel系统服务

vim /usr/lib/systemd/system/flannel.service

[Unit]
Description=Flanneld overlay address etcd agent
After=network.target
Before=docker.service
 
[Service]
EnvironmentFile=-/app/kubernetes/cfg/flannel
ExecStartPre=/app/kubernetes/bin/remove-docker0.sh
ExecStart=/app/kubernetes/bin/flanneld ${FLANNEL_ETCD} ${FLANNEL_ETCD_KEY} ${FLANNEL_ETCD_CAFILE} ${FLANNEL_ETCD_CERTFILE} ${FLANNEL_ETCD_KEYFILE}
ExecStartPost=/app/kubernetes/bin/mk-docker-apps.sh -d /run/flannel/docker
 
Type=notify
 
[Install]
WantedBy=multi-user.target
RequiredBy=docker.service

由于上面文件的配置ExecStartPost=/app/kubernetes/bin/mk-docker-apps.sh

需要将原来 /app/kubernetes/bin下的mk-docker-opts.sh重命名成mk-docker-apps.sh

mv mk-docker-opts.sh mk-docker-apps.sh 

分发启动服务

scp /usr/lib/systemd/system/flannel.service \
k8s-node-1:/usr/lib/systemd/system/flannel.service

scp /usr/lib/systemd/system/flannel.service \
k8s-node-2:/usr/lib/systemd/system/flannel.service

3.7.7 flannel cni插件配置

wget https://github.com/containernetworking/plugins/releases/download/\
v0.8.0/cni-plugins-linux-amd64-v0.8.0.tgz
mkdir /app/kubernetes/bin/cni

tar -zxf cni-plugins-linux-amd64-v0.8.0.tgz -C /app/kubernetes/bin/cni/
scp -r /app/kubernetes/bin/cni/ k8s-node-1:/app/kubernetes/bin/
scp -r /app/kubernetes/bin/cni/ k8s-node-2:/app/kubernetes/bin/

3.7.8 创建etcd的key

/app/kubernetes/bin/etcdctl --ca-file /app/kubernetes/ssl/ca.pem \
--cert-file /app/kubernetes/ssl/flanneld.pem \
--key-file /app/kubernetes/ssl/flanneld-key.pem \
--no-sync -C https://192.168.189.139:2379,https://192.168.189.131:2379,\
https://192.168.189.132:2379 \
mk /kubernetes/network/config '{ "Network": "10.2.0.0/16", "Backend": { "Type": "vxlan", "VNI": 1 }}' >/dev/null 2>&1

3.7.9 启动flannel

systemctl daemon-reload && systemctl start flannel
systemctl status flannel

3.7.10 修改docker启动服务

vim /usr/lib/systemd/system/docker.service

[Unit] #在Unit下面修改After和增加Requires
After=network-online.target firewalld.service flannel.service
Wants=network-online.target
Requires=flannel.service
 
[Service] #增加EnvironmentFile=-/run/flannel/docker
Type=notify
EnvironmentFile=-/run/flannel/docker
ExecStart=/usr/bin/dockerd $DOCKER_OPTS

3.7.11 分发到其它服务器

scp /usr/lib/systemd/system/docker.service \
k8s-node-1:/usr/lib/systemd/system/docker.service

scp /usr/lib/systemd/system/docker.service \
k8s-node-2:/usr/lib/systemd/system/docker.service

3.7.12 重启docker

systemctl daemon-reload && systemctl restart docker

====================================================

Kubernetes-1.14.2的源码包+kernel-ml-4.18.9.tar.gz 有百度云盘资源,链接:https://pan.baidu.com/s/1NZW2DV64DkybD6QI42lw7Q ; 提取码:t5bv

探讨更多技术,欢迎关注微信公众号:Leorizon

====================================================

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