注意:——如果你不喜歡sudo,可以查看非root用戶使用
如果Docker Hub中沒有你需要的Docker鏡像，你可以創建自己的鏡像，開始先創建一個Dockerfile:
注意:這個PostgreSQL僅設置用途。請參閱PostgreSQL文檔來調整這些設置,以便它是安全的。
# # example Dockerfile for http://docs.docker.com/examples/postgresql_service/ # FROM ubuntu MAINTAINER [email protected] # 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 keyserver.ubuntu.com --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 # Update the Ubuntu and PostgreSQL repository indexes RUN apt-get update # 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 -y -q install python-software-properties software-properties-common RUN apt-get -y -q install 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"]
使用Dockerfile構建鏡像並且指定名稱
$ sudo docker build -t eg_postgresql .
並且運行PostgreSQL服務容器
$ sudo docker run --rm -P --name pg_test eg_postgresql
有2種方法可以連接到PostgreSQL服務器。我們可以使用鏈接容器,或者我們可以從我們的主機(或網絡)訪問它。
注：
--rm刪除容器，當容器存在時成功。
在客戶端docker run中直接使用-link remote_name:local_alias使容器連接到另一個容器端口。
$ sudo 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
假設你有安裝postgresql客戶端,您可以使用主機端口映射測試。您需要使用docker ps找出映射到本地主機端口:
$ 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
一旦你已經通過身份驗證，並且有docker =#提示，您可以創建一個表並填充它。
psql (9.3.1)
Type "help" for help.
$ docker=# CREATE TABLE cities (
docker(# name varchar(80),
docker(# location point
docker(# );
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)
您可以使用PostgreSQL卷檢查定義日志文件、備份配置和數據:
$ 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
