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Dockerコンテナ上でsysctlでカーネルパラメータを変更する方法

Last updated at Posted at 2015-04-30

##背景
Dockerコンテナで構築した開発環境で、guardを用いて開発していたところinotifyの不足によるエラーに遭遇した。
対策はguardのgithubページにある通りだが、sysctl -pを実行するとerror: "Read-only file system" setting key "vm.swappiness"というようなエラーに遭遇する。

##対応
Dockerコンテナの起動時に、--privilegedオプションをつける。

% docker run --privileged --volumes-from dev -p 35729:35729 -p 2222:22 -p 80:3000 -itd osamunmun/centos6:1.1 /usr/sbin/sshd -D
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