首页 › Kubernetes论坛 › Kubernetes V1.15 二进制部署集群

东智哥 發表於 2019-8-16 17:13:00

Kubernetes V1.15 二进制部署集群

<h2 id="1-架构篇">1. 架构篇</h2>
<p></p>
<h3 id="11-kubernetes-架构说明">1.1 kubernetes 架构说明</h3>
<p><img src="https://cdn.nlark.com/yuque/0/2019/png/206952/1564577511433-970dda8f-915b-4ba3-bde6-bd562fc445b0.png#align=left&amp;display=inline&amp;height=732&amp;name=%E5%9B%BE%E7%89%87.png&amp;originHeight=732&amp;originWidth=967&amp;size=206423&amp;status=done&amp;width=967" alt="图片.png" loading="lazy"><br>
</p>
<h3 id="12-flannel网络架构图">1.2 Flannel网络架构图</h3>
<p><img src="https://cdn.nlark.com/yuque/0/2019/png/206952/1564577532575-5d725f80-102a-48b2-a453-c6be0d1e6cb5.png#align=left&amp;display=inline&amp;height=630&amp;name=%E5%9B%BE%E7%89%87.png&amp;originHeight=630&amp;originWidth=1004&amp;size=96777&amp;status=done&amp;width=1004" alt="图片.png" loading="lazy"></p>
<blockquote>
<p>集群功能各模块功能描述：<br>
<strong>Master节点：</strong><br>
Master节点上面主要由四个模块组成，APIServer，schedule,controller-manager,etcd<br>
APIServer: APIServer负责对外提供RESTful的kubernetes API的服务，它是系统管理指令的统一接口，任何对资源的增删该查都要交给APIServer处理后再交给etcd，如图，kubectl(kubernetes提供的客户端工具，该工具内部是对kubernetes API的调用）是直接和APIServer交互的。<br>
schedule: schedule负责调度Pod到合适的Node上，如果把scheduler看成一个黑匣子，那么它的输入是pod和由多个Node组成的列表，输出是Pod和一个Node的绑定。 kubernetes目前提供了调度算法，同样也保留了接口。用户根据自己的需求定义自己的调度算法。<br>
controller manager: 如果APIServer做的是前台的工作的话，那么controller manager就是负责后台的。每一个资源都对应一个控制器。而control manager就是负责管理这些控制器的，比如我们通过APIServer创建了一个Pod，当这个Pod创建成功后，APIServer的任务就算完成了。<br>
etcd：etcd是一个高可用的键值存储系统，kubernetes使用它来存储各个资源的状态，从而实现了Restful的API。</p>
<p><strong>Node节点：</strong><br>
每个Node节点主要由三个模板组成：kublet, kube-proxy<br>
kube-proxy: 该模块实现了kubernetes中的服务发现和反向代理功能。kube-proxy支持TCP和UDP连接转发，默认基Round Robin算法将客户端流量转发到与service对应的一组后端pod。服务发现方面，kube-proxy使用etcd的watch机制监控集群中service和endpoint对象数据的动态变化，并且维护一个service到endpoint的映射关系，从而保证了后端pod的IP变化不会对访问者造成影响，另外，kube-proxy还支持session affinity。<br>
kublet：kublet是Master在每个Node节点上面的agent，是Node节点上面最重要的模块，它负责维护和管理该Node上的所有容器，但是如果容器不是通过kubernetes创建的，它并不会管理。本质上，它负责使Pod的运行状态与期望的状态一致。</p>
</blockquote>
<p></p>
<h3 id="13-kubernetes工作流程">1.3 Kubernetes工作流程</h3>
<p><img src="https://cdn.nlark.com/yuque/0/2019/png/206952/1564577632607-a9896412-556e-4db0-93d4-e4233a4ea938.png#align=left&amp;display=inline&amp;height=591&amp;name=%E5%9B%BE%E7%89%87.png&amp;originHeight=591&amp;originWidth=949&amp;size=121090&amp;status=done&amp;width=949" alt="图片.png" loading="lazy"></p>
<blockquote></blockquote>
<p></p>
<h2 id="2-环境说明">2. 环境说明</h2>
<p></p>
<h3 id="21-部署节点说明">2.1 部署节点说明</h3>
<table>
<thead>
<tr>
<th style="text-align: center">主机名<br></th>
<th style="text-align: center">IP<br></th>
<th style="text-align: center">用途</th>
<th style="text-align: center">部署软件</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: center">k8s-1</td>
<td style="text-align: center">192.168.123.211</td>
<td style="text-align: center">master<br></td>
<td style="text-align: center">apiserver,scheduler,controller-manager<br>etcd,flanneld</td>
</tr>
<tr>
<td style="text-align: center">k8s-2</td>
<td style="text-align: center">192.168.123.212</td>
<td style="text-align: center">node</td>
<td style="text-align: center">kubelet,kube-proxy<br>etcd,flanneld</td>
</tr>
<tr>
<td style="text-align: center">k8s-3</td>
<td style="text-align: center">192.168.123.213</td>
<td style="text-align: center">node</td>
<td style="text-align: center">kubelet,kube-proxy<br>etcd,flanneld</td>
</tr>
</tbody>
</table>
<p></p>
<h3 id="22-操作系统环境">2.2 操作系统环境</h3>
<pre><code class="language-bash"># 三台机器相同
master
# uname-r
3.10.0-957.el7.x86_64

master
# cat/etc/redhat-release
CentOS Linux release 7.6.1810 (Core)

master
# sestatus
SELinux status:               disabled
</code></pre>
<p></p>
<h3 id="23-软件包版本">2.3 软件包版本</h3>
<table>
<thead>
<tr>
<th style="text-align: center">软件包</th>
<th style="text-align: center">下载地址</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: center">kubernetes-node-linux-amd64.tar.gz</td>
<td style="text-align: center">https://dl.k8s.io/v1.15.1/kubernetes-node-linux-amd64.tar.gz</td>
</tr>
<tr>
<td style="text-align: center">kubernetes-server-linux-amd64.tar.gz</td>
<td style="text-align: center">https://dl.k8s.io/v1.15.1/kubernetes-server-linux-amd64.tar.gz</td>
</tr>
<tr>
<td style="text-align: center">flannel-v0.11.0-linux-amd64.tar.gz</td>
<td style="text-align: center">https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz</td>
</tr>
<tr>
<td style="text-align: center">etcd-v3.3.10-linux-amd64.tar.gz</td>
<td style="text-align: center">https://github.com/etcd-io/etcd/releases/download/v3.3.10/etcd-v3.3.10-linux-amd64.tar.gz</td>
</tr>
</tbody>
</table>
<p></p>
<h2 id="3-kubernetes-安装及配置">3. Kubernetes 安装及配置</h2>
<p></p>
<h3 id="31-初始化环境">3.1 初始化环境</h3>
<p></p>
<h4 id="311-设置关闭防火墙及selinux">3.1.1 设置关闭防火墙及SELINUX</h4>
<pre><code class="language-bash">systemctl stop firewalld &amp;&amp; systemctl disable firewalld
setenforce 0
vi /etc/selinux/config
SELINUX=disabled
</code></pre>
<p></p>
<h4 id="312-关闭swap">3.1.2 关闭swap</h4>
<pre><code class="language-bash">swapoff -a &amp;&amp; sysctl -w vm.swappiness=0
sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
</code></pre>
<p></p>
<h4 id="313-设置docker所需参数">3.1.3 设置Docker所需参数</h4>
<pre><code class="language-bash">cat &gt; /etc/sysctl.d/kubernetes.conf &lt;&lt;EOF
net.ipv4.ip_forward=1
net.ipv4.tcp_tw_recycle=0
vm.swappiness=0
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.ipv6.conf.all.disable_ipv6=1
EOF
sysctl -p/etc/sysctl.d/kubernetes.conf
</code></pre>
<p></p>
<h4 id="314-安装-docker">3.1.4 安装 Docker</h4>
<pre><code class="language-bash"># 配置yum源
cd/etc/yum.repo.d/
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum clean all ;yumrepolist -y

# 安装docker ，版本 18.06.2
yuminstalldocker-ce-18.06.2.ce-3.el7 -y

# 启动
systemctl start docker &amp;&amp; systemctl enable docker
</code></pre>
<p></p>
<h4 id="315-创建相关目录">3.1.5 创建相关目录</h4>
<pre><code class="language-bash"># 创建安装包存储目录
mkdir/data/{install,ssl_config} -p
mkdir /data/ssl_config/{etcd,kubernetes}-p

# 创建安装目录
mkdir /cloud/k8s/etcd/{bin,cfg,ssl} -p
mkdir /cloud/k8s/kubernetes/{bin,cfg,ssl} -p
</code></pre>
<p></p>
<h4 id="316-ssh-互信配置">3.1.6 SSH 互信配置</h4>
<pre><code>ssh-keygen
ssh-copy-idk8s-1
ssh-copy-idk8s-2
ssh-copy-idk8s-3
</code></pre>
<p></p>
<h4 id="317-添加-path-变量">3.1.7 添加 PATH 变量</h4>
<pre><code class="language-bash">vi /etc/profile
export PATH=$PATH:/cloud/k8s/etcd/bin/:/cloud/k8s/kubernetes/bin/
</code></pre>
<p></p>
<h3 id="32-创建ssl证书">3.2 创建ssl证书</h3>
<p></p>
<h4 id="321-安装及配置cfssl">3.2.1 安装及配置CFSSL</h4>
<pre><code class="language-bash">wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
</code></pre>
<p></p>
<h4 id="322-创建-etcd-相关证书">3.2.2 创建 ETCD 相关证书</h4>
<p>以下操作均在/data/ssl_config/etcd/目录中<br><strong>etcd证书ca配置</strong><br></p>
<pre><code class="language-bash">cd /data/ssl_config/etcd/

cat &lt;&lt; EOF | tee ca-config.json
{
"signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
      ]
      }
    }
}
}
EOF
</code></pre>
<p><strong>创建 ETCD CA 配置文件</strong></p>
<pre><code class="language-bash">cat &lt;&lt; EOF | tee ca-csr.json
{
    "CN": "etcd CA",
    "key": {
      "algo": "rsa",
      "size": 2048
    },
    "names": [
      {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
      }
    ]
}
EOF
</code></pre>
<p><strong>创建 ETCD Server 证书</strong></p>
<pre><code class="language-bash">cat &lt;&lt; EOF | tee server-csr.json
{
    "CN": "etcd",
    "hosts": [
    "k8s-3",
    "k8s-2",
    "k8s-1",
    "192.168.123.211",
    "192.168.123.212",
    "192.168.123.213"
    ],
    "key": {
      "algo": "rsa",
      "size": 2048
    },
    "names": [
      {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
      }
    ]
}
EOF
</code></pre>
<p>生成 ETCD CA 证书和私钥</p>
<pre><code class="language-bash">cd /data/ssl_config/etcd/
# 生成ca证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
# 生成server证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
</code></pre>
<p></p>
<h4 id="323-创建-kubernetes-相关证书">3.2.3 创建 Kubernetes 相关证书</h4>
<p>以下操作均在/data/ssl_config/kubernetes/目录中<br><strong>kubernetes 证书ca配置</strong></p>
<pre><code class="language-bash">cd /data/ssl_config/kubernetes/
cat &lt;&lt; EOF | tee ca-config.json
{
"signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
      ]
      }
    }
}
}
EOF
</code></pre>
<p>创建ca证书配置</p>
<pre><code class="language-bash">cat &lt;&lt; EOF | tee ca-csr.json
{
    "CN": "kubernetes",
    "key": {
      "algo": "rsa",
      "size": 2048
    },
    "names": [
      {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
      }
    ]
}
EOF
</code></pre>
<p>生成API_SERVER证书</p>
<pre><code class="language-bash">cat &lt;&lt; EOF | tee server-csr.json
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.123.211",
      "k8s-1",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
      "algo": "rsa",
      "size": 2048
    },
    "names": [
      {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
      }
    ]
}
EOF
</code></pre>
<p>创建 Kubernetes Proxy 证书</p>
<pre><code class="language-bash">cat &lt;&lt; EOF | tee kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"hosts": [],
"key": {
    "algo": "rsa",
    "size": 2048
},
"names": [
    {
      "C": "CN",
      "L": "Beijing",
      "ST": "Beijing",
      "O": "k8s",
      "OU": "System"
    }
]
}
EOF
</code></pre>
<p>生成 **kubernetes ** CA 证书和私钥</p>
<pre><code class="language-bash"># 生成ca证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
# 生成 api-server 证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
# 生成 kube-proxy 证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
</code></pre>
<p></p>
<h3 id="33-部署etcd">3.3 部署etcd</h3>
<p></p>
<h4 id="331-配置软件包">3.3.1 配置软件包</h4>
<pre><code class="language-bash">cd /data/install/
tar -xvf etcd-v3.3.10-linux-amd64.tar.gz
cd etcd-v3.3.10-linux-amd64/
cp etcd etcdctl /cloud/k8s/etcd/bin/
</code></pre>
<p></p>
<h4 id="332-编辑etcd配置文件">3.3.2 编辑etcd配置文件</h4>
<pre><code class="language-bash">vim /cloud/k8s/etcd/cfg/etcd
#
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.123.211:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.123.211:2379"

#
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.123.211:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.123.211:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.123.211:2380,etcd02=https://192.168.123.212:2380,etcd03=https://192.168.123.213:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
</code></pre>
<p></p>
<h4 id="333-创建-etcd的-systemd-unit-文件">3.3.3 创建 etcd的 systemd unit 文件</h4>
<pre><code class="language-bash">vim /usr/lib/systemd/system/etcd.service

Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target


Type=notify
EnvironmentFile=/cloud/k8s/etcd/cfg/etcd
ExecStart=/cloud/k8s/etcd/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} \
--initial-cluster-state=new \
--cert-file=/cloud/k8s/etcd/ssl/server.pem \
--key-file=/cloud/k8s/etcd/ssl/server-key.pem \
--peer-cert-file=/cloud/k8s/etcd/ssl/server.pem \
--peer-key-file=/cloud/k8s/etcd/ssl/server-key.pem \
--trusted-ca-file=/cloud/k8s/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/cloud/k8s/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536


WantedBy=multi-user.target
</code></pre>
<p></p>
<h4 id="334-配置证书文件">3.3.4 配置证书文件</h4>
<pre><code class="language-bash">cd /data/ssl_config/etcd/
cp ca*pem server*pem /cloud/k8s/etcd/ssl
</code></pre>
<p></p>
<h4 id="335-配置文件拷贝到-节点1节点2">3.3.5 配置文件拷贝到 节点1、节点2</h4>
<pre><code class="language-bash">cd /cloud/k8s/
scp -r etcd k8s-2:/cloud/k8s/
scp -r etcd k8s-3:/cloud/k8s/
scp /usr/lib/systemd/system/etcd.servicek8s-2:/usr/lib/systemd/system/etcd.service
scp /usr/lib/systemd/system/etcd.servicek8s-3:/usr/lib/systemd/system/etcd.service
</code></pre>
<p>修改另外两台机器配置文件<br></p>
<pre><code class="language-bash">### k8s-2
cat/cloud/k8s/etcd/cfg/etcd
#
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.123.212:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.123.212:2379"

#
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.123.212:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.123.212:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.123.211:2380,etcd02=https://192.168.123.212:2380,etcd03=https://192.168.123.213:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

### k8s-3
cat/cloud/k8s/etcd/cfg/etcd
#
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.123.213:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.123.213:2379"

#
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.123.213:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.123.213:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.123.211:2380,etcd02=https://192.168.123.212:2380,etcd03=https://192.168.123.213:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
</code></pre>
<p>另外两台机器配置完成后，启动etcd服务，三台都需启动。<br>
</p>
<h4 id="336-启动etcd服务">3.3.6 启动ETCD服务</h4>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
#启动ETCD集群同时启动二个节点，单节点是无法正常启动的。
</code></pre>
<p></p>
<h4 id="337-检查服务是否正常">3.3.7 检查服务是否正常</h4>
<pre><code class="language-bash"> master
# etcdctl --ca-file=/cloud/k8s/etcd/ssl/ca.pem --cert-file=/cloud/k8s/etcd/ssl/server.pem --key-file=/cloud/k8s/etcd/ssl/server-key.pem --endpoints="https://192.168.123.211:2379,https://192.168.123.212:2379,https://192.168.123.213:2379"cluster-health
member 4c6bfb873a73368c is healthy: got healthy result from https://192.168.123.213:2379
member 622f71dbd55b34ce is healthy: got healthy result from https://192.168.123.211:2379
member f14004aa5403b07d is healthy: got healthy result from https://192.168.123.212:2379
cluster is healthy
</code></pre>
<p></p>
<h3 id="34-部署flannel网络">3.4 部署Flannel网络</h3>
<p></p>
<h4 id="341-向-etcd-写入集群-pod-网段信息">3.4.1 向 etcd 写入集群 Pod 网段信息</h4>
<pre><code class="language-bash"> cd /cloud/k8s/etcd/bin
etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \
--endpoints="https://192.168.123.211:2379,https://192.168.123.212:2379,https://192.168.123.213:2379" \
set /coreos.com/network/config\
'{ "Network": "172.18.0.0/16", "Backend": {"Type": "vxlan"}}'
</code></pre>
<blockquote>
<pre><code>写入的 Pod 网段 ${CLUSTER_CIDR} 必须是 /16 段地址，必须与 kube-controller-manager 的 --cluster-cidr 参数值一致；
</code></pre>
</blockquote>
<p></p>
<h4 id="342-部署-flannel">3.4.2 部署 flannel</h4>
<pre><code class="language-bash"> cd /data/install/
tar xfflannel-v0.11.0-linux-amd64.tar.gz
mv flanneld mk-docker-opts.sh /cloud/k8s/kubernetes/bin/
</code></pre>
<p></p>
<h4 id="353-配置flannel">3.5.3 配置flannel</h4>
<pre><code class="language-bash">vim/cloud/k8s/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.123.211:2379,https://192.168.123.212:2379,https://192.168.123.213:2379 -etcd-cafile=/cloud/k8s/etcd/ssl/ca.pem -etcd-certfile=/cloud/k8s/etcd/ssl/server.pem -etcd-keyfile=/cloud/k8s/etcd/ssl/server-key.pem"
</code></pre>
<p></p>
<h4 id="354-创建-flanneld-的-systemd-unit-文件">3.5.4 创建 flanneld 的 systemd unit 文件</h4>
<pre><code class="language-bash">vim /usr/lib/systemd/system/flanneld.service

Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service


Type=notify
EnvironmentFile=/cloud/k8s/kubernetes/cfg/flanneld
ExecStart=/cloud/k8s/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/cloud/k8s/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure


WantedBy=multi-user.target
</code></pre>
<blockquote>
<pre><code>mk-docker-opts.sh 脚本将分配给 flanneld 的 Pod 子网网段信息写入 /run/flannel/docker 文件，后续 docker 启动时 使用这个文件中的环境变量配置 docker0 网桥；
</code></pre>
<p>flanneld 使用系统缺省路由所在的接口与其它节点通信，对于有多个网络接口（如内网和公网）的节点，可以用 -iface 参数指定通信接口，如上面的 eth0 接口;<br>
flanneld 运行时需要 root 权限；</p>
</blockquote>
<p></p>
<h4 id="355-配置docker启动指定子网段">3.5.5 配置Docker启动指定子网段</h4>
<pre><code class="language-bash">vim /usr/lib/systemd/system/docker.service

Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target


Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd$DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s


WantedBy=multi-user.target
</code></pre>
<p></p>
<h4 id="356-将flanneld-systemd-unit-文件到所有节点">3.5.6 将flanneld systemd unit 文件到所有节点</h4>
<pre><code class="language-bash">cd /cloud/k8s/
scp -r kubernetes k8s-2:/cloud/k8s/
scp -r kubernetes k8s-3:/cloud/k8s/
scp /cloud/k8s/kubernetes/cfg/flanneldk8s-2:/cloud/k8s/kubernetes/cfg/flanneld
scp /cloud/k8s/kubernetes/cfg/flanneldk8s-3:/cloud/k8s/kubernetes/cfg/flanneld
scp /usr/lib/systemd/system/docker.service    k8s-2:/usr/lib/systemd/system/docker.service
scp /usr/lib/systemd/system/docker.service    k8s-3:/usr/lib/systemd/system/docker.service
scp /usr/lib/systemd/system/flanneld.servicek8s-2:/usr/lib/systemd/system/flanneld.service
scp /usr/lib/systemd/system/flanneld.servicek8s-3:/usr/lib/systemd/system/flanneld.service

# 启动服务(每台节点都操作)
systemctl daemon-reload
systemctl start flanneld
systemctl enable flanneld
systemctl restart docker
</code></pre>
<p></p>
<h4 id="357-验证fannel网络配置">3.5.7 验证fannel网络配置</h4>
<pre><code class="language-bash"> master
# ip a
1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: eth0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:33:de:53 brd ff:ff:ff:ff:ff:ff
    inet 192.168.123.211/24 brd 192.168.123.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
3: flannel.1: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1450 qdisc noqueue state UNKNOWN group default
    link/ether 1a:6f:5a:0b:c7:18 brd ff:ff:ff:ff:ff:ff
    inet 172.18.30.0/32 scope global flannel.1
       valid_lft forever preferred_lft forever
4: docker0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500 qdisc noqueue state DOWN group default
    link/ether 02:42:5c:d0:df:e6 brd ff:ff:ff:ff:ff:ff
    inet 172.18.30.1/24 brd 172.18.30.255 scope global docker0
       valid_lft forever preferred_lft forever
</code></pre>
<p></p>
<h3 id="35-部署-master-节点">3.5 部署 master 节点</h3>
<blockquote>
<p>kubernetes master 节点运行如下组件：<br>
kube-apiserver<br>
kube-scheduler<br>
kube-controller-manager<br>
kube-scheduler 和 kube-controller-manager 可以以集群模式运行，通过 leader 选举产生一个工作进程，其它进程处于阻塞模式。</p>
</blockquote>
<p></p>
<h4 id="351--配置-master-节点文件">3.5.1配置 master 节点文件</h4>
<pre><code class="language-bash"> cd /data/install/
tar xf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
cp kube-scheduler kube-apiserver kube-controller-manager kubectl /cloud/k8s/kubernetes/bin/
</code></pre>
<p></p>
<h4 id="352-配置-kubernetes相关证书">3.5.2 配置 kubernetes相关证书</h4>
<pre><code class="language-bash">cd /data/ssl_config/kubernetes/
cp *pem /cloud/k8s/kubernetes/ssl/
</code></pre>
<p></p>
<h4 id="353-部署-kube-apiserver-组件">3.5.3 部署 kube-apiserver 组件</h4>
<p><strong>创建 TLS Bootstrapping Token</strong></p>
<pre><code class="language-bash"># head -c 16 /dev/urandom | od -An -t x | tr -d ' '
449bbeb0ea7e50f321087a123a509a19

# vim /cloud/k8s/kubernetes/cfg/token.csv
449bbeb0ea7e50f321087a123a509a19,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
</code></pre>
<p><strong>创建apiserver配置文件</strong></p>
<pre><code class="language-bash">vim /cloud/k8s/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.123.211:2379,https://192.168.123.212:2379,https://192.168.123.213:2379 \
--bind-address=192.168.123.211 \
--secure-port=6443 \
--advertise-address=192.168.123.211 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--enable-bootstrap-token-auth \
--token-auth-file=/cloud/k8s/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/cloud/k8s/kubernetes/ssl/server.pem\
--tls-private-key-file=/cloud/k8s/kubernetes/ssl/server-key.pem \
--client-ca-file=/cloud/k8s/kubernetes/ssl/ca.pem \
--service-account-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/cloud/k8s/etcd/ssl/ca.pem \
--etcd-certfile=/cloud/k8s/etcd/ssl/server.pem \
--etcd-keyfile=/cloud/k8s/etcd/ssl/server-key.pem"
</code></pre>
<p><strong>创建 kube-apiserver systemd unit 文件</strong></p>
<pre><code class="language-bash">vim/usr/lib/systemd/system/kube-apiserver.service

Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes


EnvironmentFile=/cloud/k8s/kubernetes/cfg/kube-apiserver
ExecStart=/cloud/k8s/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure


WantedBy=multi-user.target
</code></pre>
<p><strong>启动服务</strong></p>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
</code></pre>
<p><strong>查看apiserver是否运行</strong></p>
<pre><code class="language-bash"> master
# ps -ef |grep kube-apiserver
root      5475   12 7月30 ?       01:57:41 /cloud/k8s/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://192.168.123.211:2379,https://192.168.123.212:2379,https://192.168.123.213:2379 --bind-address=192.168.123.211 --secure-port=6443 --advertise-address=192.168.123.211 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --enable-bootstrap-token-auth --token-auth-file=/cloud/k8s/kubernetes/cfg/token.csv --service-node-port-range=30000-50000 --tls-cert-file=/cloud/k8s/kubernetes/ssl/server.pem --tls-private-key-file=/cloud/k8s/kubernetes/ssl/server-key.pem --client-ca-file=/cloud/k8s/kubernetes/ssl/ca.pem --service-account-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem --etcd-cafile=/cloud/k8s/etcd/ssl/ca.pem --etcd-certfile=/cloud/k8s/etcd/ssl/server.pem --etcd-keyfile=/cloud/k8s/etcd/ssl/server-key.pem
root      688629300 19:49 pts/0    00:00:00 grep --color=auto kube-apiserver
</code></pre>
<p></p>
<h4 id="354-部署kube-scheduler">3.5.4 部署kube-scheduler</h4>
<p><strong>创建kube-scheduler配置文件</strong></p>
<pre><code class="language-bash">vim/cloud/k8s/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"
</code></pre>
<blockquote>
<pre><code>--address：在 127.0.0.1:10251 端口接收 http /metrics 请求；kube-scheduler 目前还不支持接收 https 请求；
</code></pre>
<p>--kubeconfig：指定 kubeconfig 文件路径，kube-scheduler 使用它连接和验证 kube-apiserver；<br>
--leader-elect=true：集群运行模式，启用选举功能；被选为 leader 的节点负责处理工作，其它节点为阻塞状态；</p>
</blockquote>
<p><strong>创建kube-scheduler systemd unit 文件</strong></p>
<pre><code class="language-bash">vim /usr/lib/systemd/system/kube-scheduler.service

Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes


EnvironmentFile=/cloud/k8s/kubernetes/cfg/kube-scheduler
ExecStart=/cloud/k8s/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure


WantedBy=multi-user.target
</code></pre>
<p><strong>启动kube-scheduler服务</strong></p>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable kube-scheduler.service
systemctl restart kube-scheduler.service
</code></pre>
<p><strong>查看kube-scheduler是否运行</strong></p>
<pre><code class="language-bash"> master
#ps -ef |grep kube-scheduler
root      726929300 19:54 pts/0    00:00:00 grep --color=auto kube-scheduler
root   13970   10 8月02 ?       00:01:21 /cloud/k8s/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect

master
# systemctl status kube-scheduler
● kube-scheduler.service - Kubernetes Scheduler
   Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2019-08-02 18:33:11 CST; 1 day 1h ago
   Docs: https://github.com/kubernetes/kubernetes
Main PID: 13970 (kube-scheduler)
    Tasks: 10
   Memory: 19.1M
   CGroup: /system.slice/kube-scheduler.service
         └─13970 /cloud/k8s/kubernetes/bin/kube-scheduler --logtostderr=tru...

8月 03 19:46:52 k8s-1 kube-scheduler: I0803 19:46:52.580662   13970 ...d
8月 03 19:47:03 k8s-1 kube-scheduler: I0803 19:47:03.578985   13970 ...d
8月 03 19:47:03 k8s-1 kube-scheduler: I0803 19:47:03.583437   13970 ...d
8月 03 19:48:31 k8s-1 kube-scheduler: I0803 19:48:31.637472   13970 ...d
8月 03 19:48:48 k8s-1 kube-scheduler: I0803 19:48:48.617124   13970 ...d
8月 03 19:50:00 k8s-1 kube-scheduler: I0803 19:50:00.589103   13970 ...d
8月 03 19:50:18 k8s-1 kube-scheduler: I0803 19:50:18.616574   13970 ...d
8月 03 19:52:15 k8s-1 kube-scheduler: I0803 19:52:15.629976   13970 ...d
8月 03 19:52:45 k8s-1 kube-scheduler: I0803 19:52:45.580103   13970 ...d
8月 03 19:53:56 k8s-1 kube-scheduler: I0803 19:53:56.601687   13970 ...d
Hint: Some lines were ellipsized, use -l to show in full.
</code></pre>
<p></p>
<h4 id="355-部署kube-controller-manager">3.5.5 部署kube-controller-manager</h4>
<p><strong>创建kube-controller-manager配置文件</strong></p>
<pre><code class="language-bash">vim/cloud/k8s/kubernetes/cfg/kube-controller-manager
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/cloud/k8s/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem\
--root-ca-file=/cloud/k8s/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem"
</code></pre>
<p><strong>创建kube-controller-manager systemd unit 文件</strong></p>
<pre><code class="language-bash">vim/usr/lib/systemd/system/kube-controller-manager.service

Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes


EnvironmentFile=/cloud/k8s/kubernetes/cfg/kube-controller-manager
ExecStart=/cloud/k8s/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure


WantedBy=multi-user.target
</code></pre>
<p><strong>启动服务</strong></p>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager
</code></pre>
<p><strong>查看kube-controller-manager是否运行</strong></p>
<pre><code class="language-bash"> master
# ps -ef |grep kube-controller-manager
root      775929300 19:59 pts/0    00:00:00 grep --color=auto kube-controller-manager
root   13972   10 8月02 ?       00:10:56 /cloud/k8s/kubernetes/bin/kube-controller-manager --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect=true --address=127.0.0.1 --service-cluster-ip-range=10.0.0.0/24 --cluster-name=kubernetes --cluster-signing-cert-file=/cloud/k8s/kubernetes/ssl/ca.pem --cluster-signing-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem --root-ca-file=/cloud/k8s/kubernetes/ssl/ca.pem --service-account-private-key-file=/cloud/k8s/kubernetes/ssl/ca-key.pem

master
#systemctl status kube-controller-manager
● kube-controller-manager.service - Kubernetes Controller Manager
   Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2019-08-02 18:33:13 CST; 1 day 1h ago
   Docs: https://github.com/kubernetes/kubernetes
Main PID: 13972 (kube-controller)
    Tasks: 10
   Memory: 51.9M
   CGroup: /system.slice/kube-controller-manager.service
         └─13972 /cloud/k8s/kubernetes/bin/kube-controller-manager --logtos...

8月 03 19:59:48 k8s-1 kube-controller-manager: I0803 19:59:48.522342 ...
8月 03 19:59:48 k8s-1 kube-controller-manager: I0803 19:59:48.526381 ...
8月 03 19:59:50 k8s-1 kube-controller-manager: I0803 19:59:50.211112 ...
8月 03 19:59:50 k8s-1 kube-controller-manager: I0803 19:59:50.455555 ...
8月 03 19:59:50 k8s-1 kube-controller-manager: I0803 19:59:50.738397 ...
8月 03 19:59:50 k8s-1 kube-controller-manager: I0803 19:59:50.767332 ...
8月 03 19:59:51 k8s-1 kube-controller-manager: I0803 19:59:51.502835 ...
8月 03 19:59:53 k8s-1 kube-controller-manager: I0803 19:59:53.567923 ...
8月 03 19:59:53 k8s-1 kube-controller-manager: I0803 19:59:53.567955 ...
8月 03 19:59:54 k8s-1 kube-controller-manager: I0803 19:59:54.321341 ...
Hint: Some lines were ellipsized, use -l to show in full.
</code></pre>
<p></p>
<h4 id="356-查看master集群状态">3.5.6 查看master集群状态</h4>
<pre><code class="language-bash"> master
# kubectl get cs,nodes
NAME                                 STATUS    MESSAGE             ERROR
componentstatus/controller-manager   Healthy   ok
componentstatus/scheduler            Healthy   ok
componentstatus/etcd-2               Healthy   {"health":"true"}
componentstatus/etcd-1               Healthy   {"health":"true"}
componentstatus/etcd-0               Healthy   {"health":"true"}
</code></pre>
<p></p>
<h3 id="36-部署node-节点">3.6 部署node 节点</h3>
<blockquote>
<p>kubernetes work 节点运行如下组件：<br>
docker<br>
kubelet<br>
kube-proxy</p>
</blockquote>
<p></p>
<h4 id="361-部署-kubelet-组件">3.6.1 部署 kubelet 组件</h4>
<blockquote>
<pre><code>kublet 运行在每个 worker 节点上，接收 kube-apiserver 发送的请求，管理 Pod 容器，执行交互式命令，如exec、run、logs 等;
</code></pre>
<p>kublet 启动时自动向 kube-apiserver 注册节点信息，内置的 cadvisor 统计和监控节点的资源使用情况;<br>
为确保安全，本文档只开启接收 https 请求的安全端口，对请求进行认证和授权，拒绝未授权的访问(如apiserver、heapster)。</p>
</blockquote>
<p><strong>配置node节点</strong></p>
<pre><code class="language-bash">cd /data/install/kubernetes/server/bin/
scp kubelet kube-proxy k8s-2:/cloud/k8s/kubernetes/bin/
scp kubelet kube-proxy k8s-3:/cloud/k8s/kubernetes/bin/
</code></pre>
<p><strong>创建 kubelet bootstrap.kubeconfig 文件</strong></p>
<pre><code class="language-bash"> cd /data/ssl_config/kubernetes/
vim environment.sh
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=449bbeb0ea7e50f321087a123a509a19
KUBE_APISERVER="https://192.168.123.211:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=bootstrap.kubeconfig

# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig

# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
</code></pre>
<blockquote>
<p>通过 <code>bashenvironment.sh</code>获取 bootstrap.kubeconfig 配置文件。<br></p>
</blockquote>
<p><strong>创建 kubelet.kubeconfig 文件</strong><br></p>
<pre><code class="language-bash">vim envkubelet.kubeconfig.sh
# 创建kubelet bootstrapping kubeconfig
BOOTSTRAP_TOKEN=449bbeb0ea7e50f321087a123a509a19
KUBE_APISERVER="https://192.168.123.211:6443"

# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kubelet.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials kubelet \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=kubelet.kubeconfig

# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet \
--kubeconfig=kubelet.kubeconfig

# 设置默认上下文
kubectl config use-context default --kubeconfig=kubelet.kubeconfig
</code></pre>
<p><strong>创建kube-proxy kubeconfig文件</strong></p>
<pre><code class="language-bash">vimenv_proxy.sh
# 创建kube-proxy kubeconfig文件

BOOTSTRAP_TOKEN=449bbeb0ea7e50f321087a123a509a19
KUBE_APISERVER="https://192.168.123.211:6443"

kubectl config set-cluster kubernetes \
--certificate-authority=./ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \
--client-certificate=./kube-proxy.pem \
--client-key=./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
</code></pre>
<p>将bootstrap kubeconfig kube-proxy.kubeconfig 文件拷贝到所有 nodes节点</p>
<pre><code class="language-bash">scp -rp bootstrap.kubeconfig kube-proxy.kubeconfig k8s-2:/cloud/k8s/kubernetes/cfg/
scp -rp bootstrap.kubeconfig kube-proxy.kubeconfig k8s-3:/cloud/k8s/kubernetes/cfg/
</code></pre>
<p></p>
<h4 id="362-创建kubelet-参数配置文件拷贝到所有-nodes节点">3.6.2 创建kubelet 参数配置文件拷贝到所有 nodes节点</h4>
<p><strong>创建 kubelet 参数配置模板文件</strong></p>
<pre><code class="language-bash"> node
# cat /cloud/k8s/kubernetes/cfg/kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.123.212
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
    enabled: true
</code></pre>
<p><strong>创建kubelet配置文件</strong></p>
<pre><code class="language-bash">vim/cloud/k8s/kubernetes/cfg/kubelet
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=k8s-2 \
--kubeconfig=/cloud/k8s/kubernetes/cfg/kubelet.kubeconfig \
--bootstrap-kubeconfig=/cloud/k8s/kubernetes/cfg/bootstrap.kubeconfig \
--config=/cloud/k8s/kubernetes/cfg/kubelet.config \
--cert-dir=/cloud/k8s/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
</code></pre>
<p><strong>创建kubelet systemd unit 文件</strong></p>
<pre><code class="language-bash"> vim /usr/lib/systemd/system/kubelet.service

Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service


EnvironmentFile=/cloud/k8s/kubernetes/cfg/kubelet
ExecStart=/cloud/k8s/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process


WantedBy=multi-user.target
</code></pre>
<p><strong>将kubelet-bootstrap用户绑定到系统集群角色</strong></p>
<pre><code class="language-bash">kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap
</code></pre>
<p></p>
<h4 id="363-启动kubelet服务">3.6.3 启动kubelet服务</h4>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet
</code></pre>
<p></p>
<h4 id="364-approve-kubelet-csr-请求">3.6.4 approve kubelet CSR 请求</h4>
<pre><code class="language-bash">kubectl get csr
kubectl certificate approve $NAME
kubectl get csr
csr 状态变为 Approved,Issued 即可
</code></pre>
<blockquote>
<ul>
<li>Requesting User：请求 CSR 的用户，kube-apiserver 对它进行认证和授权；</li>
<li>Subject：请求签名的证书信息；</li>
<li>证书的 CN 是 system:node:kube-node2， Organization 是 system:nodes，kube-apiserver 的 Node 授权模式会授予该证书的相关权限；</li>
</ul>
</blockquote>
<p></p>
<h4 id="365-查看集群状态">3.6.5 查看集群状态</h4>
<pre><code class="language-bash"> master
# kubectlgetnodes,cs
NAME         STATUS   ROLES   AGE   VERSION
node/k8s-2   Ready    node    3d22h   v1.15.1
node/k8s-3   Ready    node    3d22h   v1.15.1

NAME                                 STATUS    MESSAGE             ERROR
componentstatus/scheduler            Healthy   ok
componentstatus/controller-manager   Healthy   ok
componentstatus/etcd-0               Healthy   {"health":"true"}
componentstatus/etcd-2               Healthy   {"health":"true"}
componentstatus/etcd-1               Healthy   {"health":"true"}
</code></pre>
<p></p>
<h3 id="37-部署-node-kube-proxy-组件">3.7 部署 node kube-proxy 组件</h3>
<blockquote>
<p>kube-proxy 运行在所有 node节点上，它监听 apiserver 中 service 和 Endpoint 的变化情况，创建路由规则来进行服务负载均衡。</p>
</blockquote>
<p></p>
<h4 id="371-创建kube-proxy配置文件">3.7.1 创建kube-proxy配置文件</h4>
<pre><code class="language-bash">vim/cloud/k8s/kubernetes/cfg/kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=k8s-2 \
--cluster-cidr=10.0.0.0/24 \
--kubeconfig=/cloud/k8s/kubernetes/cfg/kube-proxy.kubeconfig"
</code></pre>
<p></p>
<h4 id="372-创建kube-proxy-systemd-unit-文件">3.7.2 创建kube-proxy systemd unit 文件</h4>
<pre><code class="language-bash">vim /usr/lib/systemd/system/kube-proxy.service

Description=Kubernetes Proxy
After=network.target


EnvironmentFile=/cloud/k8s/kubernetes/cfg/kube-proxy
ExecStart=/cloud/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure


WantedBy=multi-user.target
</code></pre>
<p></p>
<h4 id="373-启动kube-proxy服务">3.7.3 启动kube-proxy服务</h4>
<pre><code class="language-bash">systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy
</code></pre>
<p></p>
<h4 id="374-检查服务运行状态">3.7.4 检查服务运行状态</h4>
<pre><code class="language-bash"> node
#systemctl status kube-proxy
● kube-proxy.service - Kubernetes Proxy
   Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
   Active: active (running) since 二 2019-07-30 22:30:04 CST; 3 days ago
Main PID: 5764 (kube-proxy)
    Tasks: 0
   Memory: 11.8M
   CGroup: /system.slice/kube-proxy.service
         ‣ 5764 /cloud/k8s/kubernetes/bin/kube-proxy --logtostderr=true --v...

8月 03 20:51:33 k8s-2 kube-proxy: I0803 20:51:33.736946    5764 iptab...]
8月 03 20:51:33 k8s-2 kube-proxy: I0803 20:51:33.740738    5764 healt..."
8月 03 20:51:33 k8s-2 kube-proxy: I0803 20:51:33.740762    5764 proxi...s
8月 03 20:51:33 k8s-2 kube-proxy: I0803 20:51:33.740780    5764 bound...s
8月 03 20:51:34 k8s-2 kube-proxy: I0803 20:51:34.018700    5764 confi...e
8月 03 20:51:34 k8s-2 kube-proxy: I0803 20:51:34.028396    5764 confi...e
8月 03 20:51:36 k8s-2 kube-proxy: I0803 20:51:36.035812    5764 confi...e
8月 03 20:51:36 k8s-2 kube-proxy: I0803 20:51:36.046563    5764 confi...e
8月 03 20:51:38 k8s-2 kube-proxy: I0803 20:51:38.045395    5764 confi...e
8月 03 20:51:38 k8s-2 kube-proxy: I0803 20:51:38.061197    5764 confi...e
Hint: Some lines were ellipsized, use -l to show in full.
</code></pre>
<p>至此 kubernetes 1.15 版本简单部署完成~<br>[未完待续]</p>


</div>
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作者：惨绿少年
<br>
出处：http://clsn.io
<br>
本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
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来源：https://www.cnblogs.com/clsn/p/11365132.html

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