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在Docker上安装PostgreSQL

假设没有符合您需要的码头形象码头枢纽,你可以自己创造一个。

首先创建一个新的Dockerfile*

这个PostgreSQL设置只用于开发目的。请参考PostgreSQL文档来微调这些设置,使其具有适当的安全性。

#
# example Dockerfile for https://docs.docker.com/examples/postgresql_service/#

FROM ubuntu

# 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

# Adjust PostgreSQL configuration so that remote connections to the
# database are possible.RUN echo "host all  all    0.0.0.0/0  md5" >> /etc/postgresql/9.3/main/pg_hba.conf

# And add ``listen_addresses`` to ``/etc/postgresql/9.3/main/postgresql.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
VOLUME  ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]# Set the default command to run when starting the container
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"]

从Dockerfile构建一个图像,为它指定一个名称。

$ docker build -t eg_postgresql .

在前台%29中运行PostgreSQL服务器容器%28:

$ docker run --rm -P --name pg_test eg_postgresql

有两种连接PostgreSQL服务器的方法。我们可以用链接容器,或者我们可以从主机%28或网络%29访问它。

*--rm在容器成功退出时移除容器及其图像。

使用容器链接

容器可以直接链接到另一个容器的港口-link remote_name:local_alias在客户的docker run这将设置一些环境变量,然后可用于连接:

$ docker run --rm -t -i --link pg_test:pg eg_postgresql bash

postgres@7ef98b1b7243:/$ psql -h $PG_PORT_5432_TCP_ADDR -p $PG_PORT_5432_TCP_PORT -d docker -U docker --password

从您的主机系统连接

假设安装了PostgreSQLClient,也可以使用主机映射端口进行测试。你需要用docker ps要了解容器首先映射到哪个本地主机端口:

$ docker ps

CONTAINER ID        IMAGE                  COMMAND                CREATED             STATUS              PORTS                                      NAMES
5e24362f27f6        eg_postgresql:latest   /usr/lib/postgresql/   About an hour ago   Up About an hour    0.0.0.0:49153->5432/tcp                    pg_test

$ psql -h localhost -p 49153 -d docker -U docker --password

测试数据库

一旦您通过身份验证并拥有docker =#提示,您可以创建一个表并填充它。

psql (9.3.1)Type "help" for help.$ docker=# CREATE TABLE cities (docker(#     name            varchar(80),docker(#     location        pointdocker(# );CREATE TABLE
$ docker=# INSERT INTO cities VALUES ('San Francisco', '(-194.0, 53.0)');INSERT 0 1$ docker=# select * from cities;
     name      | location---------------+-----------
 San Francisco | (-194,53)(1 row)

使用容器卷

可以使用定义的卷检查PostgreSQL日志文件,并备份配置和数据:

$ docker run --rm --volumes-from pg_test -t -i busybox sh/ # ls
bin      etc      lib      linuxrc  mnt      proc     run      sys      usr
dev      home     lib64    media    opt      root     sbin     tmp      var/ # ls /etc/postgresql/9.3/main/environment      pg_hba.conf      postgresql.conf
pg_ctl.conf      pg_ident.conf    start.conf/tmp # ls /var/log
ldconfig    postgresql
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