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Debian(Jessie)をdocker(/sbin/init)で起動

Last updated at Posted at 2015-11-18

dockerを/sbin/initで実行

前回の記事でWheezyはかなりキレイに起動したのでならばJessieでもとやってみました。

debian + apache2 + php5

バージョンを前回7.9だったのを今回は8.2に変更します。
Jussisから/sbin/initは無くなったのでgettyの止め方が分からない・・・

Dockerfile
FROM debian:8.2

MAINTAINER takara

WORKDIR /root/

ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update
RUN apt-get -y install apache2 php5
ENV DEBIAN_FRONTEND dialog

EXPOSE 80

CMD ["/sbin/init", "3"]

ビルド

$ docker build -t deb_init:8.2 .

常駐実行

デーモンで実行

$ docker run -d --name deb_init -h deb_init deb_init:8.2

中に入ってプロセスを確認

$ docker exec -it deb_init bash
root@deb_init:~# ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  1.5  0.4  28160  4192 ?        Ss   23:18   0:00 /sbin/init 3
root        21  0.6  0.3  31172  3368 ?        Ss   23:18   0:00 /lib/systemd/systemd-journald
root        26  0.7  0.2  38900  2984 ?        Ss   23:18   0:00 /lib/systemd/systemd-udevd
root        47  0.0  0.1  12836  1836 ?        Ss   23:18   0:00 /sbin/agetty --noclear tty1 linux
root        50  0.0  0.1  12836  1844 ?        Ss   23:18   0:00 /sbin/agetty --noclear tty2 linux
root        53  0.0  0.1  12836  1828 tty6     Ss+  23:18   0:00 /sbin/agetty --noclear tty6 linux
root        54  0.0  0.1  12836  1832 ?        Ss   23:18   0:00 /sbin/agetty --noclear tty5 linux
root        56  0.0  0.1  12836  1904 tty4     Ss+  23:18   0:00 /sbin/agetty --noclear tty4 linux
root        58  0.0  0.1  12836  1864 tty3     Ss+  23:18   0:00 /sbin/agetty --noclear tty3 linux
root        84  0.2  2.1 219060 21536 ?        Ss   23:18   0:00 /usr/sbin/apache2 -k start
www-data    87  0.0  0.6 219084  7164 ?        S    23:18   0:00 /usr/sbin/apache2 -k start
www-data    88  0.0  0.6 219084  7164 ?        S    23:18   0:00 /usr/sbin/apache2 -k start
www-data    89  0.0  0.6 219084  7164 ?        S    23:18   0:00 /usr/sbin/apache2 -k start
www-data    90  0.0  0.6 219084  7164 ?        S    23:18   0:00 /usr/sbin/apache2 -k start
www-data    91  0.0  0.6 219084  7164 ?        S    23:18   0:00 /usr/sbin/apache2 -k start
root        95  0.6  0.3  20236  3204 ?        S    23:18   0:00 /bin/bash
root       111  0.0  0.2  17492  2056 ?        R+   23:18   0:00 ps aux

debian Wheezyの時と違ってttyが止められない :cry:
systemctl deisable getty@.serviceとかでもtty1しか止まらない。うーん。
でも起動後にsystemctl stop getty@tty1とかやると止まることを確認。仕方ないので止めるためのサービスを追加。

なんかもっと良い方法ないのかな?
ご存じの方、ご教授ください。 :sob:

asset/ttystop
#!/bin/bash
### BEGIN INIT INFO
# Provides:          ttystop
# Required-Start:
# Required-Stop:
# Should-Start:
# Default-Start: 3 4 5
# Default-Stop:
# X-Interactive:     true
# Short-Description: ttystop
### END INIT INFO
systemctl stop getty@tty1 getty@tty2 getty@tty3 getty@tty4 getty@tty5 getty@tty6

サービス登録

Dockerfile の下の方に以下のサービスを登録するコードを追加

COPY asset/ttystop /etc/init.d/
RUN chkconfig --add ttystop

再ビルド後起動

とりあえず、ttyは消えた

root@deb_init:~# ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  1.7  0.4  28192  4432 ?        Ss   11:05   0:00 /sbin/init 3
root        25  0.8  0.3  31172  3460 ?        Ss   11:05   0:00 /lib/systemd/systemd-journald
root        27  0.8  0.3  38996  3188 ?        Ss   11:05   0:00 /lib/systemd/systemd-udevd
root        85  0.3  2.1 219060 21904 ?        Ss   11:05   0:00 /usr/sbin/apache2 -k start
www-data    88  0.0  0.7 219084  7260 ?        S    11:05   0:00 /usr/sbin/apache2 -k start
www-data    89  0.0  0.7 219084  7260 ?        S    11:05   0:00 /usr/sbin/apache2 -k start
www-data    90  0.0  0.7 219084  7260 ?        S    11:05   0:00 /usr/sbin/apache2 -k start
www-data    91  0.0  0.7 219084  7260 ?        S    11:05   0:00 /usr/sbin/apache2 -k start
www-data    92  0.0  0.7 219084  7260 ?        S    11:05   0:00 /usr/sbin/apache2 -k start
root        96  1.6  0.2  20236  3052 ?        S    11:05   0:00 /bin/bash
root       101  0.0  0.1  17492  2028 ?        R+   11:05   0:00 ps aux

止まらなかった(試した)コマンド

RUN systemctl disable getty-static
RUN systemctl disable getty@
RUN systemctl disable getty-static
RUN systemctl list-unit-files --type=service|grep getty
RUN ln -sf lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty2.service
RUN ln -sf lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty3.service
RUN ln -sf lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty4.service
RUN ln -sf lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty5.service
RUN ln -sf lib/systemd/system/getty@.service /etc/systemd/system/getty.target.wants/getty@tty6.service
RUN systemctl disable getty@tty1
RUN systemctl disable getty@tty2
RUN systemctl stop getty@tty3
RUN systemctl stop getty@tty4
RUN systemctl stop getty@tty5
RUN systemctl stop getty@tty6

( ̄ヘ ̄;)ウーン
正解は何だろう?

参考サイト

systemd FAQ

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