LoginSignup
0

More than 5 years have passed since last update.

Kubernetesの起動順序や読み込む環境定義ファイル

Last updated at Posted at 2016-11-19

1 環境

[root@master1 ~]# cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)

2 現在のランレベル

[root@master1 ~]# systemctl get-default
multi-user.target

3 k8s,etcd,Dockerのユニット定義ファイルの格納場所(/usr/lib/systemd/system配下)

[root@master1 ~]# ls -la /etc/systemd/system/multi-user.target.wants|grep -e kube -e etcd -e docker
lrwxrwxrwx. 1 root root   38 11月  9 20:13 docker.service -> /usr/lib/systemd/system/docker.service
lrwxrwxrwx. 1 root root   36 11月 14 20:07 etcd.service -> /usr/lib/systemd/system/etcd.service
lrwxrwxrwx. 1 root root   46 11月 16 20:11 kube-apiserver.service -> /usr/lib/systemd/system/kube-apiserver.service
lrwxrwxrwx. 1 root root   55 11月 18 20:01 kube-controller-manager.service -> /usr/lib/systemd/system/kube-controller-manager.service
lrwxrwxrwx. 1 root root   42 11月 18 20:01 kube-proxy.service -> /usr/lib/systemd/system/kube-proxy.service
lrwxrwxrwx. 1 root root   46 11月 18 20:01 kube-scheduler.service -> /usr/lib/systemd/system/kube-scheduler.service
lrwxrwxrwx. 1 root root   39 11月 16 20:11 kubelet.service -> /usr/lib/systemd/system/kubelet.service
[root@master1 ~]#

4 起動順序


[Unit]
Description=Docker Storage Setup
After=cloud-init.service
Before=docker.service

[Unit]
Description=Docker Application Container Engine
After=network.target rhel-push-plugin.socket
Wants=docker-storage-setup.service

[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Unit]
Description=Kubernetes API Server
After=network.target
After=etcd.service

[Unit]
Description=Kubernetes Kube-Proxy Server
After=network.target

[Unit]
Description=Kubernetes Kubelet Server
After=docker.service
Requires=docker.service

[Unit]
Description=Kubernetes Controller Manager

[Unit]
Description=Kubernetes Scheduler Plugin

5 起動時に読み込む環境変数

サービス名 読み込む環境変数定義ファイル(EnvironmentFile定義) 備考
docker-storage-setup.service /etc/sysconfig/docker-storage-setup
docker.service /etc/sysconfig/docker 環境変数として GOTRACEBACK=crash を読み込む
/etc/sysconfig/docker-storage
/etc/sysconfig/docker-network
etcd.service /etc/etcd/etcd.conf
kube-apiserver.service /etc/kubernetes/config k8s関連のサービスは共通の
/etc/kubernetes/apiserver 定義ファイル(config)を読み込んだあと
kube-proxy.service /etc/kubernetes/config 個別の定義ファイルを読み込む
/etc/kubernetes/proxy
kubelet.service /etc/kubernetes/config
/etc/kubernetes/proxy
kube-controller-manager.service /etc/kubernetes/config
/etc/kubernetes/proxy
kube-scheduler.service /etc/kubernetes/config
/etc/kubernetes/proxy

6 参考情報

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
0