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Dockerの時刻

Posted at

Dockerコンテナの時刻

Dockerコンテナを通常立ち上げると、時刻はUTCになってしまう。

# docker run -it --name homma01 centos /bin/bash
[root@dcd3aad6428e /]# date
Wed Aug 19 15:10:31 UTC 2015

JSTを使用したい

やっぱり時刻はJSTにしたい。
2つの方法があるみたいです。

参考情報は、Will docker container auto sync time with the host machine?です。

  • -v /etc/localtime:/etc/localtime:ro
  • -e "TZ=Asia/Tokyo"

/etc/localtimeをマウントする方法

-vオプション
# docker run -it --name homma01 -v /etc/localtime:/etc/localtime:ro centos /bin/bash
[root@d1698b83d04a /]# 
[root@d1698b83d04a /]# date
Thu Aug 20 00:09:19 JST 2015

環境変数で渡す方法

-eオプション
# docker run -it --name homma03 -e "TZ=Asia/Tokyo" centos /bin/bash 
[root@fbd2a720e5f4 /]# 
[root@fbd2a720e5f4 /]# date
Thu Aug 20 00:15:07 JST 2015

ログを出力必要がある場合、どちらかを指定しておきたい。
いずれ標準で、マウントされそうな予感がする。

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