k8s 基础(4) k8s安装

转自 http://www.cnblogs.com/informatics/p/7389806.html

安装和配置

从github.com/kubernetes/kubernetes上下载1.6.8已编译好的二进制文件

tar xzvf kubernetes.tar.gz
cd kubernetes

./cluster/get-kube-binaries.sh

执行该shell会自动下载kube的server和client可执行文件，其中客户端文件会自动安装在kubernetes目录下的client文件夹下，只需将bin添加到PATH下就可以了。

可以不用管这里的bin，server的可执行包里也包含了客户端命令行工具

服务端可执行文件下载到了server文件夹，没有被自动展开

cd server
tar xzvf kubernetes-server-linux-amd64.tar.gz

执行该shell会自动下载kube的server和client可执行文件，其中客户端文件会自动安装在kubernetes目录下的client文件夹下，服务端文件会安装在kubernetes/server/kubernetes/server/bin/下面（包含客户端文件)

master节点需要：kube-apiserver, kube-controller-manager, kube-scheduler

node节点需要：kubelet和kube-proxy

这些程序我们通过systemctl的方式来进行管理（包括etcd）

1、master配置

kube-etcd.service

[Unit]
Description=Kube-etcd Service
After=network.target

[Service]
Type=notify
ExecStart=/usr/local/bin/etcd \
--name "etcd1" \
--data-dir="~/.k8s/etcd" \
--listen-client-urls "http://192.168.0.222:2379,http://127.0.0.1:2379" \
--listen-peer-urls "http://192.168.0.222:2380" \
--advertise-client-urls "http://192.168.0.222:2379" \
--initial-advertise-peer-urls "http://192.168.0.222:2380" \
--initial-cluster "etcd1=http://192.168.0.222:2380" \
--initial-cluster-state "new"
Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

kube-apiserver.service

[Unit]
Description=Kube-apiserver Service
After=network.target

[Service]
Type=notify
ExecStart=/usr/local/bin/kube-apiserver \
            --admission-control=NamespaceAutoProvision,LimitRanger,SecurityContextDeny \
            --apiserver-count=1 \
            --cors-allowed-origins=.* \
            --enable-garbage-collector=false \
            --etcd-servers=http://192.168.0.222:2379 \
            --insecure-bind-address=0.0.0.0 \
            --insecure-port=8080 \
            --log-dir=~/.kube/log/kube-apiserver \
            --logtostderr=false \
            --service-cluster-ip-range=192.168.0.222/24 \
            --v=5 \

Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

kube-controller-manager.service

[Unit]
Description=Kube-controller-manager Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/kube-controller-manager \
          --enable-garbage-collector=false \
          --logtostderr=false \
          --log-dir=~/.kube/log/kube-controller-manager \
          --pod-eviction-timeout=5m0s \
          --master=http://0.0.0.0:8080 \
          --node-monitor-grace-period=40s \
          --terminated-pod-gc-threshold=12500 \
          --leader-elect=true \
          --v=4 \

Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

kube-scheduler.service

[Unit]
Description=Kube-scheduler Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/kube-scheduler \
            --log-dir=~/.k8s/log/kube-scheduler \
            --logtostderr=false \
            --master=http://0.0.0.0:8080 \
            --leader-elect=true \
            --v=5 \

Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

注意修改自己的IP地址，下面启动服务……

//add to path

cd etcd-v3.2.5-linux-amd64; sudo cp -rf etcd /usr/local/bin
cd kubernetes/server/kubernetes/server/bin/; sudo cp -rf kube-apiserver kube-controller-manager kube-scheduler kubectl /usr/local/bin
sudo cp -rf kube-etcd.service kube-apiserver.service kube-controller-manager.service kube-scheduler.service /lib/systemd/system/

//start server

sudo -i
systemctl --system daemon-reload
systemctl start kube-apiserver.service
systemctl start kube-controller-manager.service
systemctl start kube-scheduler.service

 2. node  1

kubelet.service

[Unit]
Description=Kubelet Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/kubelet \
            --api-servers=http://192.168.0.222:8080 \
            --hostname-override=10.0.48.50 \
            --image-gc-high-threshold=80 \
            --image-gc-low-threshold=50 \
            --log-dir=~/.k8s/log/kubelet \
            --logtostderr=false \
            --pod-infra-container-image=docker.cloudin.com/google_containers/pause-amd64:3.0 \
            --system-reserved cpu=2000m,memory=4G \
            --v=5 \

Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

kube-proxy.service

[Unit]
Description=Kube-proxy Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/kube-proxy  \
            --log-dir=~/.k8s/log/kube-proxy \
            --logtostderr=false \
            --master=http://10.0.48.50:8080 \
            --v=5 \

Restart=always
LimitNOFILE=65536

[Install]
WantedBy=default.target

node 2需要将相应ip地址中的10.0.48.50改为10.0.48.59
下面启动服务……

//add to path
cd kubernetes/server/kubernetes/server/bin/; sudo cp -rf kubelet kube-proxy /usr/local/bin
sudo cp -rf kubelet.service kube-proxy.service /lib/systemd/system/

//start
sudo -i
systemctl --system daemon-reload
systemctl start kubelet.service
systemctl start kube-proxy.service

3、测试环境是否搭建成功

$kubectl get nodes
NAME         STATUS     AGE       VERSION
10.0.48.50   NotReady   1h        v1.6.8
10.0.48.59   Ready      1h        v1.6.8

$kubectl get service
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes 10.0.0.1 <none> 443/TCP 1h