docker-postgresql

Docker trusted build for PostgreSQL database

Version

PostgreSQL v9.3.3

Build from repository

$ git clone [email protected]:jllopis/docker-postgresql.git
$ cd docker-postgresql
$ docker build --rm -t my_user/postgresql:latest

Start

# docker run -d -p 5432:5432 \
             -v {local_etc_fs}:/etc/postgresql \
             -v {local_log_fs}:/var/log/postgresql \
             -v {local_lib_fs}:/var/lib/postgresql \
             -t -h {node_host_name} -name {image_name} my_user/postgresql:latest

where:

local_XXX_fs is the local storage to keep data safe. If not specified it will use the container so the data will be lost upon restart.
node_hostname is the name that will hold the HOSTNAME variable inside the container. This is accessible to CMD so etcd will use it as their node name. If not specified a default name wil be used.
image_name is the name given to the image so you don't have to play with ids

You can also start postgresql image with command line options:

# docker run -d -p 7777:7777 \
             -v {local_etc_fs}:/etc/postgresql \
             -v {local_log_fs}:/var/log/postgresql \
             -v {local_lib_fs}:/var/lib/postgresql \
             -t -h {node_host_name} -name {image_name} \
             my_user/postgresql:latest -c config_file=/etc/postgresql/other_postgresql.conf

Ports

The ports used are:

5432

Remember that if you want access from outside the container you must explicitly tell docker to do so by setting -p at image launch.

PostgreSQL use

By default, a postgres user is created and given a password (default password: secret). It is highly encouraged that you change this password for your own.

To change the password issue:

psql --command "ALTER USER postgres ENCRYPTED PASSWORD 'secret';"

Change 'secret' for your highly secure password.

Usually you can modify the database (manage users, databases, etc) by executing psql commands from your host by way of the postgres user:

psql -Upostgres --command "SQL COMMAND;"

Examples

Create a user

psql -Upostgres --command "CREATE ROLE my_user WITH LOGIN ENCRYPTED PASSWORD 'very_secure_password';"

Create a database

psql -Upostgres --command "CREATE DATABASE testdb OWNER my_user ENCODING 'UTF-8';"

Drop a database

psql -Upostgres --command "DROP DATABASE testdb;"

How to restore data from a pg_dump backup

$ psql -Upostgres < path_to_dump_file.sql

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