kubernetes系列（一）安裝和配置

   談到kubernetes（或者說k8s）不得不提到雲計算、虛擬化以及容器技術，相關介紹網上一大堆，再也不贅述。而kubernetes的出現就是爲了高效的管理雲端運行的docker容器。

環境

docker 1.30  ----------docker的安裝請參考官方文檔

golang 1.8.3 ----------自行百度

etcd 3.2.5 --------------安裝文檔參考官方文檔

kubernetes 1.6.8 ---稍後介紹

部署方案

 

master+etcd    10.0.45.44

node1          10.0.48.50

node2          10.0.48.59

 

 

 

安裝和配置

從github.com/kubernetes/kubernetes上下載1.6.8已編譯好的二進制文件

tar xzvf kubernetes.tar.gz
cd kubernetes

./cluster/get-kube-binaries.sh

執行該shell會自動下載kube的server和client可執行文件，其中客戶端文件會自動安裝在kubernetes目錄下的client文件夾下，服務端文件會安裝在kubernetes/server/kubernetes/server/bin/下面（包含客戶端文件)

master節點須要：kube-apiserver, kube-controller-manager, kube-scheduler

node節點須要：kubelet和kube-proxy

這些程序咱們經過systemctl的方式來進行管理（包括etcd）

一、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://10.0.45.44:2379,http://127.0.0.1:2379" \
    --listen-peer-urls="http://10.0.45.44:2380" \
    --advertise-client-urls="http://10.0.45.44:2379" \
    --initial-advertise-peer-urls="http://10.0.45.44:2380" \
    --initial-cluster="etcd1=http://10.0.45.44:2380" \
    --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://10.0.45.44:2379 \
            --insecure-bind-address=0.0.0.0 \
            --insecure-port=8080 \
            --log-dir=~/.kube/log/kube-apiserver \
            --logtostderr=false \
            --service-cluster-ip-range=10.0.0.0/16 \
            --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

注意修改本身的IP地址，下面啓動服務……

//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://10.0.45.44:8080 \
            --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須要將相應ip地址中的10.0.48.50改成10.0.48.59
下面啓動服務……

//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

 三、測試環境是否搭建成功

$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

 

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