CoreOS實踐(2)—在coreos上安裝Kubernetes

下載kubernetes

sudo mkdir -p /opt/bin

sudo wget https://storage.googleapis.com/kubernetes/binaries.tar.gz

sudo tar -xvf binaries.tar.gz -C /opt/bin

 

git clone https://github.com/kelseyhightower/kubernetes-coreos.git

sudo cp kubernetes-coreos/units/* /etc/systemd/system/

 

啓動docker服務

$ sudo vi /etc/systemd/system/docker.service

$ sudo systemctl daemon-reload      

$ sudo systemctl restart docker

$ sudo systemctl status docker

 

啓動kubernetes的相關服務

sudo systemctl start apiserver

sudo systemctl start controller-manager

sudo systemctl start kubelet

sudo systemctl start proxy

 

$ sudo systemctl status apiserver

● apiserver.service - Kubernetes API Server

   Loaded: loaded (/etc/systemd/system/apiserver.service; disabled)

   Active: active (running) since Mon 2014-09-22 07:00:58 UTC; 5s ago

     Docs: https://github.com/GoogleCloudPlatform/kubernetes

 Main PID: 1099 (apiserver)

   CGroup: /system.slice/apiserver.service

           └─1099 /opt/bin/apiserver --address=127.0.0.1 --port=8080 --etcd_servers=http://127.0.0.1:4001 --mac...

 

Sep 22 07:00:58 core-01 systemd[1]: Starting Kubernetes API Server...

Sep 22 07:00:58 core-01 systemd[1]: Started Kubernetes API Server.

Sep 22 07:00:58 core-01 apiserver[1099]: I0922 07:00:58.466359 01099 apiserver.go:76] No cloud provider specified.

Sep 22 07:00:58 core-01 apiserver[1099]: E0922 07:00:58.470180 01099 healthy_registry.go:77] 127.0.0.1 fai...fused

Sep 22 07:00:58 core-01 apiserver[1099]: I0922 07:00:58.472353 01099 log.go:151] GET /api/v1beta1/services...) 200

Hint: Some lines were ellipsized, use -l to show in full.

建立pod

$cat kubernetes-coreos/pods/redis.json

{

  "id": "redis",

  "desiredState": {

    "manifest": {

      "version": "v1beta1",

      "id": "redis",

      "containers": [{

        "name": "redis",

        "image": "dockerfile/redis",

        "ports": [{

          "containerPort": 6379,

          "hostPort": 6379

        }]

      }]

    }

  },

  "labels": {

    "name": "redis"

  }

}

 

$ /opt/bin/kubecfg -h http://127.0.0.1:8080 -c kubernetes-coreos/pods/redis.json create /pods

ID                  Image(s)            Host                Labels              Status

----------          ----------          ----------          ----------          ----------

redis               dockerfile/redis    /                   name=redis          Waiting

 

 

core@core-01 ~ $ kubecfg list /pods

ID                  Image(s)            Host                Labels              Status

----------          ----------          ----------          ----------          ----------

redis               dockerfile/redis    /                   name=redis          Waiting

 

在操做過程當中發現pod的狀態一直爲Waiting狀態。因爲scheduler服務沒有啓動的緣由，目前kelseyhightower/kubernetes-coreos尚未scheduler.service，但已經存在PR。參考這裏。

 

core@core-01 /etc/systemd/system $ cat scheduler.service

[Unit]

After=apiserver.service

ConditionFileIsExecutable=/opt/bin/scheduler

Description=Kubernetes Scheduler

Documentation=https://github.com/GoogleCloudPlatform/kubernetes

Wants=apiserver.service

 

[Service]

ExecStart=/opt/bin/scheduler \

--logtostderr=true \

--master=127.0.0.1:8080

Restart=always

RestartSec=10

 

[Install]

WantedBy=multi-user.target

啓動scheduler.service。

 

測試redis

$ docker run -t -i dockerfile/redis /usr/local/bin/redis-cli -h 10.1.42.1

10.1.42.1:6379> help

redis-cli 2.8.17

Type: "help @<group>" to get a list of commands in <group>

      "help <command>" for help on <command>

      "help <tab>" to get a list of possible help topics

      "quit" to exit

10.1.42.1:6379> help set

 

  SET key value [EX seconds] [PX milliseconds] [NX|XX]

  summary: Set the string value of a key

  since: 1.0.0

  group: string

 

10.1.42.1:6379> SET key1 value1

OK

10.1.42.1:6379> help get

 

  GET key

  summary: Get the value of a key

  since: 1.0.0

  group: string

 

10.1.42.1:6379> GET key1

"value1"

 

主要參考

[1] https://github.com/kelseyhightower/kubernetes-coreos

[2] https://coreos.com/blog/running-kubernetes-example-on-CoreOS-part-1/

 

做者：YY哥 
出處：http://www.cnblogs.com/hustcat/ 本文版權歸做者和博客園共有，歡迎轉載，但未經做者贊成必須保留此段聲明，且在文章頁面明顯位置給出原文鏈接，不然保留追究法律責任的權利。