k8s(3)__Node搭建

# Node二进制搭建

创建对应目录：
`mkdir -pv /usr/local/kubernetes/{conf,bin,logs}`

# K8s的Node组件

拷贝Kubelet，Kube-proxy，kubectl到node节点上，这些在server包上。

Kubelet组件：确保容器的运行，管理由K8s创建的容器

Kube-proxy：维护容器的网络规则

Docker: 容器运行环境

# 环境变量设置

```

vim /usr/local/kubernetes/conf/kubernetes

KUBE_MASTER="--master=192.168.237.50:8080"

KUBE_LOG_LEVEL="--v=2"

KUBE_LOGTOSTDERR="--logtostderr=false"

KUBE_LOG_DIR="--log-dir=/usr/local/kubernetes/logs/"

```

# Kube-proxy的启动

```

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

[Unit]

Description=kube-proxy

After=network.target

[Service]

EnvironmentFile=-/usr/local/kubernetes/conf/kubernetes

ExecStart=/usr/local/kubernetes/bin/kube-proxy \

$KUBE_MASTER \

$KUBE_LOG_LEVEL \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_DIR

[Install]

WantedBy=multi-user.target

```

# 查看docker是cgroupfs驱动类型

`docker info |grep 'Cgroup Driver'`

下面的配置文件2选1哦！！！！

# Kubelet配置文件1（systemd类型）

```

vim /usr/local/kubernetes/conf/kubelet

KUBELET_ADDRESS="--address=xxx"

KUBELET_ARGS="--kubeconfig=/usr/local/kubernetes/conf/kubeconfig --runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice --cgroup-driver=systemd --enable-server=true --enable-debugging-handlers=true"

```

# Kubelet配置文件2（Cgroup类型）

```

vim /usr/local/kubernetes/conf/kubelet

KUBELET_ADDRESS="--address=xxx"

KUBELET_ARGS="--kubeconfig=/usr/local/kubernetes/conf/kubeconfig --cgroup-driver=cgroupfs --enable-server=true --enable-debugging-handlers=true"

```

# kubeconfig配置文件

```

vim /usr/local/kubernetes/conf/kubeconfig

apiVersion: v1

kind: Config

users:

- name: kubelet

clusters:

- name: kubernetes

cluster:

server: 192.168.237.50:8080

contexts:

- context:

cluster: kubernetes

user: kubelet

name: default

current-context: default

```

# Kubelete的启动配置

```

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

[Unit]

Description=kubelet

After=docker.target

[Service]

EnvironmentFile=-/usr/local/kubernetes/conf/kubernetes

EnvironmentFile=-/usr/local/kubernetes/conf/kubelet

ExecStart=/usr/local/kubernetes/bin/kubelet \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_LEVEL \

$KUBE_LOG_DIR \

$KUBELET_ADDRESS \

$KUBELET_ARGS

[Install]

WantedBy=multi-user.target

```

Master上查看是否有Node节点的注册

kubectl --server=192.168.237.50:8080 get node

搭建两台Node，后面课程有用到

# 报错及解决办法
启动Kubelet时报错
```
failed to run Kubelet: Running with swap on is not supported, please disable swap! or set --fail-swap-on flag to false. /proc/swaps contained
```
- 关闭交换分区
swapoff -a

回复 / 取消回复