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kubernetes 1.11.2整理Ⅱ

配置 kubelet 认证

kubelet 授权 kube-apiserver 的一些操作 exec run logs 等

# RBAC 只需创建一次就可以

kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes

创建 bootstrap kubeconfig 文件

注意: token 生效时间为 1day , 超过时间未创建自动失效,需要重新创建 token

创建 集群所有 kubelet 的 token

注意修改hostname

[root@master1 kubernetes]# kubeadm token create --description kubelet-bootstrap-token --groups system:bootstrappers:master1 --kubeconfig ~/.kube/config
of2phx.v39lq3ofeh0w6f3m

[root@master1 kubernetes]# kubeadm token create --description kubelet-bootstrap-token --groups system:bootstrappers:master2 --kubeconfig ~/.kube/config
b3stk9.edz2iylppqjo5qbc

[root@master1 kubernetes]# kubeadm token create --description kubelet-bootstrap-token --groups system:bootstrappers:master3 --kubeconfig ~/.kube/config
ck2uqr.upeu75jzjj1ko901

[root@master1 kubernetes]# kubeadm token create --description kubelet-bootstrap-token --groups system:bootstrappers:node1 --kubeconfig ~/.kube/config
1ocjm9.7qa3rd5byuft9gwr

[root@master1 kubernetes]# kubeadm token create --description kubelet-bootstrap-token --groups system:bootstrappers:node2 --kubeconfig ~/.kube/config
htsqn3.z9z6579gxw5jdfzd

查看生成的 token

[root@master1 kubernetes]# kubeadm token list --kubeconfig ~/.kube/config
TOKEN                     TTL       EXPIRES                     USAGES                   DESCRIPTION               EXTRA GROUPS
1ocjm9.7qa3rd5byuft9gwr   23h       2018-09-02T16:06:32+08:00   authentication,signing   kubelet-bootstrap-token   system:bootstrappers:node1

b3stk9.edz2iylppqjo5qbc   23h       2018-09-02T16:03:46+08:00   authentication,signing   kubelet-bootstrap-token   system:bootstrappers:master2

ck2uqr.upeu75jzjj1ko901   23h       2018-09-02T16:05:16+08:00   authentication,signing   kubelet-bootstrap-token   system:bootstrappers:master3

htsqn3.z9z6579gxw5jdfzd   23h       2018-09-02T16:06:34+08:00   authentication,signing   kubelet-bootstrap-token   system:bootstrappers:node2

of2phx.v39lq3ofeh0w6f3m   23h       2018-09-02T16:03:40+08:00   authentication,signing   kubelet-bootstrap-token   system:bootstrappers:master1

以下为了区分 会先生成 hostname 名称加 bootstrap.kubeconfig

生成 master1 的 bootstrap.kubeconfig

# 配置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=master1-bootstrap.kubeconfig

# 配置客户端认证

kubectl config set-credentials kubelet-bootstrap \
  --token=of2phx.v39lq3ofeh0w6f3m \
  --kubeconfig=master1-bootstrap.kubeconfig


# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=master1-bootstrap.kubeconfig
  
  
# 配置默认关联
kubectl config use-context default --kubeconfig=master1-bootstrap.kubeconfig

# 拷贝生成的 master1-bootstrap.kubeconfig 文件

mv master1-bootstrap.kubeconfig /etc/kubernetes/bootstrap.kubeconfig

生成 master2 的 bootstrap.kubeconfig

# 配置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=master2-bootstrap.kubeconfig

# 配置客户端认证

kubectl config set-credentials kubelet-bootstrap \
  --token=b3stk9.edz2iylppqjo5qbc \
  --kubeconfig=master2-bootstrap.kubeconfig


# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=master2-bootstrap.kubeconfig
  
  
# 配置默认关联
kubectl config use-context default --kubeconfig=master2-bootstrap.kubeconfig


# 拷贝生成的 master2-bootstrap.kubeconfig 文件

scp master2-bootstrap.kubeconfig 192.168.161.162:/etc/kubernetes/bootstrap.kubeconfig

生成 master3 的 bootstrap.kubeconfig

# 配置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=master3-bootstrap.kubeconfig

# 配置客户端认证

kubectl config set-credentials kubelet-bootstrap \
  --token=ck2uqr.upeu75jzjj1ko901 \
  --kubeconfig=master3-bootstrap.kubeconfig


# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=master3-bootstrap.kubeconfig
  
  
# 配置默认关联
kubectl config use-context default --kubeconfig=master3-bootstrap.kubeconfig


# 拷贝生成的 master3-bootstrap.kubeconfig 文件

scp master3-bootstrap.kubeconfig 192.168.161.163:/etc/kubernetes/bootstrap.kubeconfig

生成 node1 的 bootstrap.kubeconfig

# 配置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=node1-bootstrap.kubeconfig

# 配置客户端认证

kubectl config set-credentials kubelet-bootstrap \
  --token=1ocjm9.7qa3rd5byuft9gwr \
  --kubeconfig=node1-bootstrap.kubeconfig


# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=node1-bootstrap.kubeconfig
  
  
# 配置默认关联
kubectl config use-context default --kubeconfig=node1-bootstrap.kubeconfig


# 拷贝生成的 node1-bootstrap.kubeconfig 文件

scp node1-bootstrap.kubeconfig 192.168.161.77:/etc/kubernetes/bootstrap.kubeconfig

生成 node2 的 bootstrap.kubeconfig

# 配置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=node2-bootstrap.kubeconfig

# 配置客户端认证

kubectl config set-credentials kubelet-bootstrap \
  --token=htsqn3.z9z6579gxw5jdfzd \
  --kubeconfig=node2-bootstrap.kubeconfig


# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=node2-bootstrap.kubeconfig
  
  
# 配置默认关联
kubectl config use-context default --kubeconfig=node2-bootstrap.kubeconfig


# 拷贝生成的 node2-bootstrap.kubeconfig 文件

scp node2-bootstrap.kubeconfig 192.168.161.78:/etc/kubernetes/bootstrap.kubeconfig

配置 bootstrap RBAC 权限

kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --group=system:bootstrappers


# 否则报如下错误

failed to run Kubelet: cannot create certificate signing request: certificatesigningrequests.certificates.k8s.io is forbidden: User "system:bootstrap:1jezb7" cannot create certificatesigningrequests.certificates.k8s.io at the cluster scope

创建自动批准相关 CSR 请求的 ClusterRole

vi /etc/kubernetes/tls-instructs-csr.yaml


kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: system:certificates.k8s.io:certificatesigningrequests:selfnodeserver
rules:
- apiGroups: ["certificates.k8s.io"]
  resources: ["certificatesigningrequests/selfnodeserver"]
  verbs: ["create"]


# 创建 yaml 文件
[root@master1 kubernetes]# kubectl apply -f /etc/kubernetes/tls-instructs-csr.yaml
clusterrole.rbac.authorization.k8s.io/system:certificates.k8s.io:certificatesigningrequests:selfnodeserver created

[root@master1 kubernetes]# kubectl describe ClusterRole/system:certificates.k8s.io:certificatesigningrequests:selfnodeserver
Name:         system:certificates.k8s.io:certificatesigningrequests:selfnodeserver
Labels:       <none>
Annotations:  kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"rbac.authorization.k8s.io/v1","kind":"ClusterRole","metadata":{"annotations":{},"name":"system:certificates.k8s.io:certificatesigningreq...
PolicyRule:
  Resources                                                      Non-Resource URLs  Resource Names  Verbs
  ---------                                                      -----------------  --------------  -----
  certificatesigningrequests.certificates.k8s.io/selfnodeserver  []                 []              [create]
#   ClusterRole 绑定到适当的用户组


# 自动批准 system:bootstrappers 组用户 TLS bootstrapping 首次申请证书的 CSR 请求

kubectl create clusterrolebinding node-client-auto-approve-csr --clusterrole=system:certificates.k8s.io:certificatesigningrequests:nodeclient --group=system:bootstrappers


# 自动批准 system:nodes 组用户更新 kubelet 自身与 apiserver 通讯证书的 CSR 请求

kubectl create clusterrolebinding node-client-auto-renew-crt --clusterrole=system:certificates.k8s.io:certificatesigningrequests:selfnodeclient --group=system:nodes


# 自动批准 system:nodes 组用户更新 kubelet 10250 api 端口证书的 CSR 请求

kubectl create clusterrolebinding node-server-auto-renew-crt --clusterrole=system:certificates.k8s.io:certificatesigningrequests:selfnodeserver --group=system:nodes


Node 端

单 Node 部分 需要部署的组件有

docker calico kubelet kube-proxy

这几个组件。 Node 节点 基于 Nginx 负载 API 做 Master HA

# master 之间除 api server 以外其他组件通过 etcd 选举,api server 默认不作处理;

在每个 node 上启动一个 nginx,每个 nginx 反向代理所有 api server;

node  kubeletkube-proxy 连接本地的 nginx 代理端口;

 nginx 发现无法连接后端时会自动踢掉出问题的 api server,从而实现 api server  HA;

mark

这种模式和我之前所接触的不太一样,之前所做的架构是基于KUBE-APISERVER 的负载均衡,所有的node节点都会去连接负载均衡的虚拟VIP。

创建Nginx 代理

在每个 node 都必须创建一个 Nginx 代理, 这里特别注意, 当 Master 也做为 Node 的时候 不需要配置 Nginx-proxy

# 创建配置目录
mkdir -p /etc/nginx

# 写入代理配置
cat << EOF >> /etc/nginx/nginx.conf
error_log stderr notice;

worker_processes auto;
events {
  multi_accept on;
  use epoll;
  worker_connections 1024;
}

stream {
    upstream kube_apiserver {
        least_conn;
        server 192.168.161.161:6443;
        server 192.168.161.162:6443;
    }

    server {
        listen        0.0.0.0:6443;
        proxy_pass    kube_apiserver;
        proxy_timeout 10m;
        proxy_connect_timeout 1s;
    }
}
EOF

# 更新权限
chmod +r /etc/nginx/nginx.conf
# 配置 Nginx 基于 docker 进程,然后配置 systemd 来启动

cat << EOF >> /etc/systemd/system/nginx-proxy.service
[Unit]
Description=kubernetes apiserver docker wrapper
Wants=docker.socket
After=docker.service

[Service]
User=root
PermissionsStartOnly=true
ExecStart=/usr/bin/docker run -p 127.0.0.1:6443:6443 \\
                              -v /etc/nginx:/etc/nginx \\
                              --name nginx-proxy \\
                              --net=host \\
                              --restart=on-failure:5 \\
                              --memory=512M \\
                              nginx:1.13.7-alpine
ExecStartPre=-/usr/bin/docker rm -f nginx-proxy
ExecStop=/usr/bin/docker stop nginx-proxy
Restart=always
RestartSec=15s
TimeoutStartSec=30s

[Install]
WantedBy=multi-user.target
EOF

启动 Nginx

systemctl daemon-reload
systemctl start nginx-proxy
systemctl enable nginx-proxy
systemctl status nginx-proxy

journalctl  -u nginx-proxy -f   ##查看实时日志

9 01 17:34:55 node1 docker[4032]: 1.13.7-alpine: Pulling from library/nginx
9 01 17:34:57 node1 docker[4032]: 128191993b8a: Pulling fs layer
9 01 17:34:57 node1 docker[4032]: 655cae3ea06e: Pulling fs layer
9 01 17:34:57 node1 docker[4032]: dbc72c3fd216: Pulling fs layer
9 01 17:34:57 node1 docker[4032]: f391a4589e37: Pulling fs layer
9 01 17:34:57 node1 docker[4032]: f391a4589e37: Waiting
9 01 17:35:03 node1 docker[4032]: dbc72c3fd216: Verifying Checksum
9 01 17:35:03 node1 docker[4032]: dbc72c3fd216: Download complete
9 01 17:35:07 node1 docker[4032]: f391a4589e37: Verifying Checksum
9 01 17:35:07 node1 docker[4032]: f391a4589e37: Download complete
9 01 17:35:15 node1 docker[4032]: 128191993b8a: Verifying Checksum
9 01 17:35:15 node1 docker[4032]: 128191993b8a: Download complete
9 01 17:35:17 node1 docker[4032]: 128191993b8a: Pull complete
9 01 17:35:50 node1 docker[4032]: 655cae3ea06e: Verifying Checksum
9 01 17:35:50 node1 docker[4032]: 655cae3ea06e: Download complete
9 01 17:35:51 node1 docker[4032]: 655cae3ea06e: Pull complete
9 01 17:35:51 node1 docker[4032]: dbc72c3fd216: Pull complete
9 01 17:35:51 node1 docker[4032]: f391a4589e37: Pull complete
9 01 17:35:51 node1 docker[4032]: Digest: sha256:34aa80bb22c79235d466ccbbfa3659ff815100ed21eddb1543c6847292010c4d
9 01 17:35:51 node1 docker[4032]: Status: Downloaded newer image for nginx:1.13.7-alpine
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: using the "epoll" event method
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: nginx/1.13.7
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: built by gcc 6.2.1 20160822 (Alpine 6.2.1)
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: OS: Linux 3.10.0-514.el7.x86_64
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: start worker processes
9 01 17:35:54 node1 docker[4032]: 2018/09/01 09:35:54 [notice] 1#1: start worker process 5

创建 kubelet.service 文件

注意修改节点的hostname↓

# 创建 kubelet 目录

mkdir -p /var/lib/kubelet

vi /etc/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=/usr/local/bin/kubelet \
  --hostname-override=node1 \
  --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/zhdya_centos_docker/zhdya_cc:pause-amd64_3.1 \
  --bootstrap-kubeconfig=/etc/kubernetes/bootstrap.kubeconfig \
  --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \
  --config=/etc/kubernetes/kubelet.config.json \
  --cert-dir=/etc/kubernetes/ssl \
  --logtostderr=true \
  --v=2

[Install]
WantedBy=multi-user.target

创建 kubelet config 配置文件

vi /etc/kubernetes/kubelet.config.json


{
  "kind": "KubeletConfiguration",
  "apiVersion": "kubelet.config.k8s.io/v1beta1",
  "authentication": {
    "x509": {
      "clientCAFile": "/etc/kubernetes/ssl/ca.pem"
    },
    "webhook": {
      "enabled": true,
      "cacheTTL": "2m0s"
    },
    "anonymous": {
      "enabled": false
    }
  },
  "authorization": {
    "mode": "Webhook",
    "webhook": {
      "cacheAuthorizedTTL": "5m0s",
      "cacheUnauthorizedTTL": "30s"
    }
  },
  "address": "192.168.161.77",
  "port": 10250,
  "readOnlyPort": 0,
  "cgroupDriver": "cgroupfs",
  "hairpinMode": "promiscuous-bridge",
  "serializeImagePulls": false,
  "RotateCertificates": true,
  "featureGates": {
    "RotateKubeletClientCertificate": true,
    "RotateKubeletServerCertificate": true
  },
  "MaxPods": "512",
  "failSwapOn": false,
  "containerLogMaxSize": "10Mi",
  "containerLogMaxFiles": 5,
  "clusterDomain": "cluster.local.",
  "clusterDNS": ["10.254.0.2"]
}

##其它node节点记得修改如上的IP地址
# 如上配置:
node1    本机hostname
10.254.0.2       预分配的 dns 地址
cluster.local.    kubernetes 集群的 domain
registry.cn-hangzhou.aliyuncs.com/zhdya_centos_docker/zhdya_cc:pause-amd64_3.1  这个是 pod 的基础镜像,既 gcr  gcr.io/google_containers/pause-amd64:3.1 镜像, 下载下来修改为自己的仓库中的比较快。
"clusterDNS": ["10.254.0.2"] 可配置多个 dns地址,逗号可开, 可配置宿主机dns. 

同理修改其它node节点

启动 kubelet

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

journalctl -u kubelet -f

创建 kube-proxy 证书

# 证书方面由于我们node端没有装 cfssl
# 我们回到 master  机器 去配置证书,然后拷贝过来

cd /opt/ssl

vi kube-proxy-csr.json

{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "ShenZhen",
      "L": "ShenZhen",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
生成 kube-proxy 证书和私钥
/opt/local/cfssl/cfssl gencert -ca=/etc/kubernetes/ssl/ca.pem \
  -ca-key=/etc/kubernetes/ssl/ca-key.pem \
  -config=/opt/ssl/config.json \
  -profile=kubernetes  kube-proxy-csr.json | /opt/local/cfssl/cfssljson -bare kube-proxy
  
# 查看生成
ls kube-proxy*
kube-proxy.csr  kube-proxy-csr.json  kube-proxy-key.pem  kube-proxy.pem

# 拷贝到目录

cp kube-proxy* /etc/kubernetes/ssl/

scp ca.pem kube-proxy* 192.168.161.77:/etc/kubernetes/ssl/

scp ca.pem kube-proxy* 192.168.161.78:/etc/kubernetes/ssl/

创建 kube-proxy kubeconfig 文件

# 配置集群

kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://127.0.0.1:6443 \
  --kubeconfig=kube-proxy.kubeconfig


# 配置客户端认证

kubectl config set-credentials kube-proxy \
  --client-certificate=/etc/kubernetes/ssl/kube-proxy.pem \
  --client-key=/etc/kubernetes/ssl/kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig
  
  
# 配置关联

kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig



# 配置默认关联
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

# 拷贝到需要的 node 端里

scp kube-proxy.kubeconfig 192.168.161.77:/etc/kubernetes/

scp kube-proxy.kubeconfig 192.168.161.78:/etc/kubernetes/

创建 kube-proxy.service 文件

1.10 官方 ipvs 已经是默认的配置 –masquerade-all 必须添加这项配置,否则 创建 svc 在 ipvs 不会添加规则

打开 ipvs 需要安装 ipvsadm ipset conntrack 软件, 在 node 中安装

yum install ipset ipvsadm conntrack-tools.x86_64 -y

yaml 配置文件中的 参数如下:

https://github.com/kubernetes/kubernetes/blob/master/pkg/proxy/apis/kubeproxyconfig/types.go

cd /etc/kubernetes/

vi  kube-proxy.config.yaml


apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 192.168.161.77
clientConnection:
  kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
clusterCIDR: 10.254.64.0/18
healthzBindAddress: 192.168.161.77:10256
hostnameOverride: node1             ##注意修改此处的hostname
kind: KubeProxyConfiguration
metricsBindAddress: 192.168.161.77:10249
mode: "ipvs"
# 创建 kube-proxy 目录

mkdir -p /var/lib/kube-proxy

vi /etc/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=/usr/local/bin/kube-proxy \
  --config=/etc/kubernetes/kube-proxy.config.yaml \
  --logtostderr=true \
  --v=1
Restart=on-failure
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

启动 kube-proxy

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

检查 ipvs 情况

[root@node1 kubernetes]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.254.0.1:443 rr
  -> 192.168.161.161:6443         Masq    1      0          0
  -> 192.168.161.162:6443         Masq    1      0          0

配置 Calico 网络

官方文档 https://docs.projectcalico.org/v3.1/introduction

下载 Calico yaml

# 下载 yaml 文件

wget http://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/hosted/calico.yaml

wget http://docs.projectcalico.org/v3.1/getting-started/kubernetes/installation/rbac.yaml

下载镜像

# 下载 镜像

# 国外镜像 有墙
quay.io/calico/node:v3.1.3
quay.io/calico/cni:v3.1.3
quay.io/calico/kube-controllers:v3.1.3


# 国内镜像
jicki/node:v3.1.3
jicki/cni:v3.1.3
jicki/kube-controllers:v3.1.3

# 阿里镜像
registry.cn-hangzhou.aliyuncs.com/zhdya_centos_docker/zhdya_cc:node_v3.1.3
registry.cn-hangzhou.aliyuncs.com/zhdya_centos_docker/zhdya_cc:cni_v3.1.3
registry.cn-hangzhou.aliyuncs.com/zhdya_centos_docker/zhdya_cc:kube-controllers_v3.1.3

# 替换镜像
sed -i 's/quay\.io\/calico/jicki/g'  calico.yaml

修改配置

vi calico.yaml

# 注意修改如下选项:


# etcd 地址

  etcd_endpoints: "https://192.168.161.161:2379,https://192.168.161.162:2379,https://192.168.161.163:2379"
  
 
# etcd 证书路径
  # If you're using TLS enabled etcd uncomment the following.
  # You must also populate the Secret below with these files. 
    etcd_ca: "/calico-secrets/etcd-ca"  
    etcd_cert: "/calico-secrets/etcd-cert"
    etcd_key: "/calico-secrets/etcd-key"  


# etcd 证书 base64 地址 (执行里面的命令生成的证书 base64 码,填入里面)

data:
  etcd-key: (cat /etc/kubernetes/ssl/etcd-key.pem | base64 | tr -d '\n')
  etcd-cert: (cat /etc/kubernetes/ssl/etcd.pem | base64 | tr -d '\n')
  etcd-ca: (cat /etc/kubernetes/ssl/ca.pem | base64 | tr -d '\n')
  
## 如上需要去掉() 只需要填写生成的编码即可
  
# 修改 pods 分配的 IP 

            - name: CALICO_IPV4POOL_CIDR
              value: "10.254.64.0/18"

查看服务

[root@master1 kubernetes]# kubectl get po -n kube-system -o wide
NAME                                      READY     STATUS    RESTARTS   AGE       IP               NODE      NOMINATED NODE
calico-kube-controllers-79cfd7887-xbsd4   1/1       Running   5          11d       192.168.161.77   node1     <none>
calico-node-2545t                         2/2       Running   0          29m       192.168.161.78   node2     <none>
calico-node-tbptz                         2/2       Running   7          11d       192.168.161.77   node1     <none>


[root@master1 kubernetes]# kubectl get nodes -o wide
NAME      STATUS    ROLES     AGE       VERSION   INTERNAL-IP      EXTERNAL-IP   OS-IMAGE                KERNEL-VERSION          CONTAINER-RUNTIME
node1     Ready     <none>    11d       v1.11.2   192.168.161.77   <none>        CentOS Linux 7 (Core)   3.10.0-514.el7.x86_64   docker://17.3.2
node2     Ready     <none>    29m       v1.11.2   192.168.161.78   <none>        CentOS Linux 7 (Core)   3.10.0-514.el7.x86_64   docker://17.3.2

修改 kubelet 配置

两台node节点都需要配置

#   kubelet 需要增加 cni 插件    --network-plugin=cni

vim /etc/systemd/system/kubelet.service


  --network-plugin=cni \


# 重新加载配置

systemctl daemon-reload
systemctl restart kubelet.service
systemctl status kubelet.service

检查网络的互通性:

[root@node1 ~]# ifconfig
tunl0: flags=193<UP,RUNNING,NOARP>  mtu 1440
        inet 10.254.102.128  netmask 255.255.255.255
        tunnel   txqueuelen 1  (IPIP Tunnel)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@node2 ~]# ifconfig
tunl0: flags=193<UP,RUNNING,NOARP>  mtu 1440
        inet 10.254.75.0  netmask 255.255.255.255
        tunnel   txqueuelen 1  (IPIP Tunnel)
        RX packets 2  bytes 168 (168.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 168 (168.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

    
直接在node2上面ping

[root@node2 ~]# ping 10.254.102.128
PING 10.254.102.128 (10.254.102.128) 56(84) bytes of data.
64 bytes from 10.254.102.128: icmp_seq=1 ttl=64 time=72.3 ms
64 bytes from 10.254.102.128: icmp_seq=2 ttl=64 time=0.272 ms

安装 calicoctl

calicoctl 是 calico 网络的管理客户端, 只需要在一台 node 里配置既可。

# 下载 二进制文件

curl -O -L https://github.com/projectcalico/calicoctl/releases/download/v3.1.3/calicoctl

mv calicoctl /usr/local/bin/

chmod +x /usr/local/bin/calicoctl


# 创建 calicoctl.cfg 配置文件

mkdir /etc/calico

vim /etc/calico/calicoctl.cfg


apiVersion: projectcalico.org/v3
kind: CalicoAPIConfig
metadata:
spec:
  datastoreType: "kubernetes"
  kubeconfig: "/root/.kube/config"


# 查看 calico 状态

[root@node1 src]# calicoctl node status
Calico process is running.

IPv4 BGP status
+----------------+-------------------+-------+----------+-------------+
|  PEER ADDRESS  |     PEER TYPE     | STATE |  SINCE   |    INFO     |
+----------------+-------------------+-------+----------+-------------+
| 192.168.161.78 | node-to-node mesh | up    | 06:54:19 | Established |
+----------------+-------------------+-------+----------+-------------+

IPv6 BGP status
No IPv6 peers found.


[root@node1 src]# calicoctl get node        ##当然我这边是在node节点操作的,node节点是没有/root/.kube/config 这个文件的,只需要从master节点copy过来即可!!
NAME
node1
node2
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