在使用Docker的時候常常會遇到單個Docker容器啓動多個服務時非常困難,比如我需要在單個Docker容器中啓動SSH和Mysql,會遇到mysql啓動成功但是沒有SSH功能或有SSH功能mysql無法啓動成功。那麼我們用什麼方式來解決這種問題呢?
supervisor完美的解決了我們問題,接下來看一下如何利用supervisor啓動帶有SSH功能的Mysql。
1.cetnos基礎鏡像 構建ssh-supervisor
下載地址:
docker pull aarongo/centos-ssh-supervisor
另附dockerfile:
FROM centos:centos6 MAINTAINER aaron "[email protected]" #Install supervisor RUN rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm RUN yum -y update && yum -y install python-pip && /usr/bin/pip install supervisor RUN mkdir -p /etc/supervisor/conf.d && mkdir -p /var/log/supervisor COPY supervisord.conf /etc/supervisord.conf VOLUME /var/log/supervisor #install sshd RUN yum install -y openssh-server && sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config # select root pasword RUN echo "root:pasword" | chpasswd && echo "root ALL=(ALL) ALL" >> /etc/sudoers RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key && ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key RUN mkdir /var/run/sshd EXPOSE 22 CMD ["/usr/bin/supervisord"]
運行方式:
docker run -d -p <localhostport>:<Containerport> aarongo/centos-ssh-supervisor #or docker run -it -p <localhostport>:<Containerport> aarongo/centos-ssh-supervisor
2.構建以ssh-supervisor爲基礎的mysql
下載地址:
docker pull aarongo/centos-mysql-supervisor
Dockerfile:
FROM aarongo/centos-ssh-supervisor MAINTAINER aaron "[email protected]" RUN yum install -y mysql-server mysql RUN /etc/init.d/mysqld start &&\ mysql -e "grant all privileges on *.* to 'user'@'%' identified by 'password';"&&\ mysql -e "grant all privileges on *.* to 'user'@'localhost' identified by 'password';"&&\ mysql -u user -ppassword -e "show databases;" COPY supervisord.conf /etc/supervisord.conf VOLUME ["/mysqldata"] EXPOSE 22 3306 CMD ["/usr/bin/supervisord"] #VOLUME 選項是將本地的目錄掛在到容器中 此處要注意:當你運行-v <hostdir>:<Containerdir> 時要確保目錄內容相同否則會出現數據丟失
運行方式:
docker run -p <localport>:<container 22> -p <localprot>:<container 3306> -it -v /mysqldata:/var/lib/mysql aarongo/centos-mysql-supervisor #or docker run -d -p <localport>:<container 22> -p <localprot>:<container 3306> -v /mysqldata:/var/lib/mysql aarongo/centos-mysql-supervisor
如果運行成功:
2014-11-26 03:55:27,487 INFO success: sshd entered RUNNING state, process has stayed up for > than 1 stsecs) 2014-11-26 03:55:27,487 INFO success: mysqld entered RUNNING state, process has stayed up for > than 1artsecs)