postgresql – Docker持久数据中的Postgres
我在docker容器中运行postgres来限制它可以访问的系统资源量.我在理解如何使数据持久化方面遇到了一些麻烦.我读过以下文章:
https://www.andreagrandi.it/2015/02/21/how-to-create-a-docker-image-for-postgresql-and-persist-data/ http://container42.com/2013/12/16/persistent-volumes-with-docker-container-as-volume-pattern/ 建议使用仅数据容器,然后让我的postgres容器链接到它.我无法理解的是;这有什么好处?据我所知,如果由于某种原因停靠机器关闭(例如,将其移动到另一台物理机器),仅数据容器会停止运行,并且所有内容都会丢失?我已经尝试在postgres容器中创建一个卷,但它实际上似乎并没有将任何内容保存到磁盘中. 这是我的docker文件.我究竟做错了什么? FROM ubuntu MAINTAINER Andrew Broadbent <andrew.broadbent@manchester.ac.uk> # Add the PostgreSQL PGP key to verify their Debian packages. # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8 # Add PostgreSQL's repository. It contains the most recent stable release # of PostgreSQL,``9.3``. RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list # Install ``python-software-properties``,``software-properties-common`` and PostgreSQL 9.3 # There are some warnings (in red) that show up during the build. You can hide # them by prefixing each apt-get statement with DEBIAN_FRONTEND=noninteractive RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3 # Note: The official Debian and Ubuntu images automatically ``apt-get clean`` # after each ``apt-get`` # Run the rest of the commands as the ``postgres`` user created by the ``postgres-9.3`` package when it was ``apt-get installed`` USER postgres # Create a PostgreSQL role named ``docker`` with ``docker`` as the password and # then create a database `docker` owned by the ``docker`` role. # Note: here we use ``&&`` to run commands one after the other - the ```` # allows the RUN command to span multiple lines. RUN /etc/init.d/postgresql start && psql --command "CREATE USER docker WITH SUPERUSER PASSWORD 'docker';" && createdb -O docker docker # Complete configuration USER root RUN echo "host all all 0.0.0.0/0 md5" >> /etc/postgresql/9.3/main/pg_hba.conf RUN echo "listen_addresses='*'" >> /etc/postgresql/9.3/main/postgresql.conf # Expose the PostgreSQL port EXPOSE 5432 # Add VOLUMEs to allow backup of config,logs and databases RUN mkdir -p /var/run/postgresql && chown -R postgres /var/run/postgresql VOLUME ["/etc/postgresql","/var/log/postgresql","/var/lib/postgresql"] # Set the default command to run when starting the container USER postgres CMD ["/usr/lib/postgresql/9.3/bin/postgres","-D","/var/lib/postgresql/9.3/main","-c","config_file=/etc/postgresql/9.3/main/postgresql.conf"] 解决方法
这个回答你关于数据容器的问题:
docker mounting volumes on host 关于你的dockerfile,我建议你: 1)使用数据容器模式 2)通过指定:docker run -v [host-path]:[container-path] …将卷安装到主机上,这样数据将保存在主机的一个位置,并且在容器后不会丢失已移除. 参考:https://docs.docker.com/engine/tutorials/dockervolumes/#/mount-a-host-directory-as-a-data-volume (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |