在centos7上部署kubernetes

以你之姓@ 2022-07-15 02:20 277阅读 0赞

http://blog.csdn.net/Qguanri/article/details/50925672

K8S 分为 master 和 slave 两类角色。

环境说明如下表：

<table> 
 <thead> 
 <tr> 
 <th align="center">对象</th> 
 <th align="center">版本</th> 
 <th align="center">IP</th> 
 <th align="center">备注</th> 
 </tr> 
 </thead> 
 <tbody> 
 <tr> 
 <td align="center">k8s-master</td> 
 <td align="center">centos7</td> 
 <td align="center">XX.XX.XX.179</td> 
 <td align="center">K8S的master所在主机</td> 
 </tr> 
 <tr> 
 <td align="center">etcd-server</td> 
 <td align="center">centos7</td> 
 <td align="center">XX.XX.XX.179</td> 
 <td align="center">etcd服务所在主机，与master在同一机器</td> 
 </tr> 
 <tr> 
 <td align="center">k8s-slave</td> 
 <td align="center">centos7</td> 
 <td align="center">XX.XX.XX.182</td> 
 <td align="center">K8S节点所在主机</td> 
 </tr> 
 </tbody> 
</table>

# 更新yum #

<code class="hljs sql has-numbering">yum update -y</code><ul style="" class="pre-numbering"><li>1</li></ul><ul style="" class="pre-numbering"><li>1</li></ul>

# 创建yum源 #

**注意：k8s-master，k8s-slave都要按照以下操作创建yum源**

登录master/slave主机：

<code class="hljs lasso has-numbering">vi virt7-docker-common-release.repo</code><ul style="" class="pre-numbering"><li>1</li></ul><ul style="" class="pre-numbering"><li>1</li></ul>

加入以下内容：

<code class="hljs ini has-numbering">[virt7-docker-common-release]
 name=virt7-docker-common-release
 baseurl=http://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/
 gpgcheck=0</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul>

# 安装服务 #

执行以下命令，安装kubernetes和etcd。

<code class="hljs lasso has-numbering">yum -y install --enablerepo=virt7-docker-common-release kubernetes etcd</code><ul style="" class="pre-numbering"><li>1</li></ul><ul style="" class="pre-numbering"><li>1</li></ul>

1.修改文件/etc/kubernetes/config(所有节点)

**注意，master和slave主机都要修改**  
指定master主机的ip，文件内容如下：

<code class="hljs ruby has-numbering">$ cat /etc/kubernetes/config
 
 
 KUBE_LOGTOSTDERR="--logtostderr=true"
 
 KUBE_LOG_LEVEL="--v=0"
 
 KUBE_ALLOW_PRIV="--allow-privileged=false"
 
 KUBE_MASTER="--master=http://XX.XX.XX.179:8080"</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul>

# 禁用防火墙 #

<code class="hljs lasso has-numbering">systemctl disable iptables-services firewalld
 systemctl stop iptables-services firewalld</code><ul style="" class="pre-numbering"><li>1</li><li>2</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li></ul>

# 在master节点配置kubernetes服务 #

1.修改配置文件/etc/etcd/etcd.conf,确保etcd监听所有地址。内容如下：

<code class="hljs haskell has-numbering">$ cat /etc/etcd/etcd.conf
 
 
 ETCD_NAME=default
 ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
 ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li></ul>

2.修改配置文件/etc/kubernetes/apiserver

<code class="hljs bash has-numbering">cat /etc/kubernetes/apiserver
 
 
 KUBE_API_ADDRESS="--address=0.0.0.0"
 
 KUBE_API_PORT="--port=8080"
 
 KUBELET_PORT="--kubelet-port=10250"
 
 KUBE_ETCD_SERVERS="--etcd-servers=http://127.0.0.1:2379"
 
 KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
 
 KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"
 
 KUBE_API_ARGS=""</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li></ul>

3.修改配置文件/etc/kubernetes/controller-manager，定义slave主机ip地址

<code class="hljs ini has-numbering">KUBELET_ADDRESSES="--machines=XX.XX.XX.182"</code><ul style="" class="pre-numbering"><li>1</li></ul><ul style="" class="pre-numbering"><li>1</li></ul>

# 在master主机上，启动服务 #

执行如下命令，批量启动服务

<code class="hljs lasso has-numbering">for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do
 systemctl restart $SERVICES
 systemctl enable $SERVICES
 systemctl status $SERVICES
 done</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li></ul>

# slave节点配置 #

**注意：slave节点主机，要安装[Docker][]，docker版本1.7以上**

# yum 安装kubernetes #

<code class="hljs lasso has-numbering">yum -y install --enablerepo=virt7-docker-common-release kubernetes flannel</code><ul style="" class="pre-numbering"><li>1</li></ul><ul style="" class="pre-numbering"><li>1</li></ul>

1.修改kubernetes配置文件，指定master。

<code class="hljs ruby has-numbering">$ cat /etc/kubernetes/config
 
 
 KUBE_MASTER="--master=http://XX.XX.XX.179:8080"</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li></ul>

2.配置kubelet服务。

<code class="hljs ruby has-numbering">$ cat /etc/kubernetes/kubelet
 
 
 KUBELET_ADDRESS="--address=0.0.0.0"
 
 KUBELET_PORT="--port=10250"
 
 KUBELET_HOSTNAME="--hostname-override=XX.XX.XX.182"
 
 KUBELET_API_SERVER="--api-servers=http://XX.XX.XX.179:8080"</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li></ul>

# 在slave主机上，启动服务 #

<code class="hljs bash has-numbering">for SERVICES in kube-proxy kubelet docker flanneld; do
 systemctl restart $SERVICES
 systemctl enable $SERVICES
 systemctl status $SERVICES
 done</code><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li></ul><ul style="" class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li></ul>

# 验证 #

现在登陆master，确认slave的状态

<code class="hljs avrasm has-numbering">$ kubectl get nodes
 
 NAME LABELS STATUS AGE
 10.16.93.182 kubernetes.io/hostname=XX.XX.XX.182 Ready 1h</code>

[Docker]: http://lib.csdn.net/base/docker