1.關閉防火牆

2.安裝etcd和kubernetes

其中etcd是作為資料庫的角色,以鍵值的方式儲存資料

yum -y install etcd  kubernetes

3.安裝好後,修改配置檔案

a. vi /etc/sysconfig/docker

其中OPTIONS設定為如下:

OPTIONS='--selinux-enabled=false --insecure-registry gcr.io'

b.  vi /etc/kubernetes/apiserver

KUBE_ADMISSION_CONTROL引數刪除ServiceAccount

4.啟動

指令碼形式 vi restart.sh

#!/bin/bash
ser=("etcd" "docker" "kube-apiserver" "kube-controller-manager" "kube-scheduler" "kubelet" "kube-proxy")
for i in ${ser[@]};do
  systemctl restart $i
  systemctl enable $i
  systemctl status $i

done

5.啟動mysql服務

a.建立mysql-rc.yaml檔案,編寫要注意空格等格式

如果報錯如下,就是語法有問題

[[email protected] ~]# kubectl create -f mysql-rc.yaml
error: error validating "mysql-rc.yaml": error validating data: found invalid field spec for v1.ReplicationControllerSpec; if you choose to ignore these errors, turn validation off with --validate=false

[[email protected] ~]# vi mysql-rc.yaml

apiVersion: v1
kind: ReplicationController
metadata: 
  name: mysql
spec:
  replicas: 1
  selector: 
    app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers: 
      - name: mysql
        image: mysql
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD

          value: "123456"

b.

建立好後,執行如下命令:

[[email protected] ~]# kubectl create -f mysql-rc.yaml 
replicationcontroller "mysql" created

成功!

c.檢視

[[email protected] ~]# kubectl get rc
NAME           DESIRED   CURRENT   READY     AGE
mysql          1         1         0         2m

[[email protected] ~]# kubectl get pods
NAME                 READY     STATUS              RESTARTS   AGE

mysql-4s06p          0/1       ContainerCreating   0          3m

我們發現出現ContainerCreating   正常應該是running

[[email protected] yum.repos.d]# kubectl describe pod redis-master-wzqsn

發現如下報錯：

Events:
  FirstSeen     LastSeen        Count   From                    SubObjectPath   Type            Reason          Message
  ---------     --------        -----   ----                    -------------   --------        ------          -------
  5m            5m              1       {default-scheduler }                    Normal          Scheduled       Successfully assigned redis-master-wzqsn to centos-minion
  5m            2m              5       {kubelet centos-minion}                 Warning         FailedSync      Error syncing pod, skipping: failed to "StartContainer" for "POD" with ErrImagePull: "image pull failed for registry.access.redhat.com/rhel7/pod-infrastructure:latest, this may be because there are no credentials on this request.  details: (open /etc/docker/certs.d/registry.access.redhat.com/redhat-ca.crt: no such file or directory)"

  4m    10s     19      {kubelet centos-minion}         Warning FailedSync      Error syncing pod, skipping: failed to "StartContainer" for "POD" with ImagePullBackOff: "Back-off pulling image \"registry.access.redhat.com/rhel7/pod-infrastructure:latest\""

檢視/etc/docker/certs.d/registry.access.redhat.com/ 

redhat-ca.crt是個軟連線，並且一直閃爍，表示並沒有這個檔案redhat-uep.pem

[[email protected] ~]# cd /etc/docker/certs.d/registry.access.redhat.com/

lrwxrwxrwx 1 root root 27 5月  19 14:20 redhat-ca.crt -> /etc/rhsm/ca/redhat-uep.pem

第一步：

第一個報錯解決方法  yum install *rhsm* -y

第二個報錯執行docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest

還是不行，

因為發現

軟體包 python-rhsm-certificates-1.19.10-1.el7_4.x86_64 被已安裝的 subscription-manager-rhsm-certificates-1.20.11-1.el7.centos.x86_64 取代

第二步：

解除安裝subscription-manager-rhsm-certificates 

yum remove subscription-manager-rhsm-certificates -y

第三步：

手動下載rpm並且安裝

[[email protected] ~]# wget http://mirror.centos.org/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm

[[email protected] ~]# rpm -ivh python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm 
準備中...                          ################################# [100%]
正在升級/安裝...

   1:python-rhsm-certificates-1.19.10-################################# [100%]

再次檢視就有了/etc/rhsm/ca/redhat-uep.pem

第三步：

[[email protected] ~]# docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
Trying to pull repository registry.access.redhat.com/rhel7/pod-infrastructure ... 
latest: Pulling from registry.access.redhat.com/rhel7/pod-infrastructure
26e5ed6899db: Pull complete 
66dbe984a319: Pull complete 
9138e7863e08: Pull complete 
Digest: sha256:92d43c37297da3ab187fc2b9e9ebfb243c1110d446c783ae1b989088495db931
Status: Downloaded newer image for registry.access.redhat.com/rhel7/pod-infrastructure:latest

[[email protected] ~]#

6.再次執行kubectl create -f redis-master-controller.yaml 

發現

[[email protected] yamlScript]# kubectl get pods
NAME                 READY     STATUS              RESTARTS   AGE

redis-master-6xj9k   0/1       ContainerCreating   0          6s

[[email protected] yamlScript]# kubectl describe pod redis-master-6xj9k
Name:           redis-master-6xj9k
Namespace:      default
Node:           127.0.0.1/127.0.0.1
Start Time:     Thu, 14 Jun 2018 10:30:58 +0800
Labels:         name=redis-master
Status:         Pending
IP:
Controllers:    ReplicationController/redis-master
Containers:
  master:
    Container ID:
    Image:                      kubeguide/redis-master
    Image ID:
    Port:                       6379/TCP
    State:                      Waiting
      Reason:                   ContainerCreating
    Ready:                      False
    Restart Count:              0
    Volume Mounts:              <none>
    Environment Variables:      <none>
Conditions:
  Type          Status
  Initialized   True 
  Ready         False 
  PodScheduled  True 
No volumes.
QoS Class:      BestEffort
Tolerations:    <none>
Events:
  FirstSeen     LastSeen        Count   From                    SubObjectPath           Type            Reason                  Message
  ---------     --------        -----   ----                    -------------           --------        ------                  -------
  2m            2m              1       {default-scheduler }                            Normal          Scheduled               Successfully assigned redis-master-6xj9k to 127.0.0.1
  2m            2m              1       {kubelet 127.0.0.1}                             Warning         MissingClusterDNS       kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
  2m            2m              1       {kubelet 127.0.0.1}     spec.containers{master} Normal          Pulling                 pulling image "kubeguide/redis-master"
[[email protected] yamlScript]# 

還在pulling中，等一會，就好了

[[email protected] yamlScript]# kubectl get pods
NAME                 READY     STATUS    RESTARTS   AGE
redis-master-6xj9k   1/1       Running   0          52m