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Merge pull request #105 from infosiftr/postgres 

Add postgres docs for environment variables
This commit is contained in:
Tianon Gravi 2014-11-20 17:10:28 -07:00
parent 658752dd73 fbf180f4d6
commit b682b6f609
2 changed files with 42 additions and 2 deletions
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22
postgres/README.md
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@ -47,7 +47,7 @@ Oracle.
## start a postgres instance
docker run --name some-postgres -d postgres
docker run --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -d postgres
This image includes `EXPOSE 5432` (the postgres port), so standard container
linking will make it automatically available to the linked containers. The
@ -65,6 +65,26 @@ default `postgres` user and database are created in the entrypoint with
docker run -it --link some-postgres:postgres --rm postgres sh -c 'exec psql -h "$POSTGRES_PORT_5432_TCP_ADDR" -p "$POSTGRES_PORT_5432_TCP_PORT" -U postgres'
## Environment Variables
The PostgreSQL image uses several environment variables which are easy to miss.
While none of the variables are required, they may significantly aid you in
using the image.
### `POSTGRES_PASSWORD`
This environment variable is recommend for you to use the PostgreSQL image. This
environment variable sets the superuser password for PostgreSQL. The default
superuser is defined by the `POSTGRES_USER` environment variable. In the above
example, it is being set to "mysecretpassword".
### `POSTGRES_USER`
This optional environment variable is used in conjunction with
`POSTGRES_PASSWORD` to set a user and its password. This varible will create the
specified user with superuser power and a database with the same name. If it is
not specified, then the default user of `postgres` will be used.
# How to extend this image
If you would like to do additional initialization in an image derived from this

22
postgres/content.md
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@ -32,7 +32,7 @@ Oracle.
## start a postgres instance
docker run --name some-postgres -d postgres
docker run --name some-postgres -e POSTGRES_PASSWORD=mysecretpassword -d postgres
This image includes `EXPOSE 5432` (the postgres port), so standard container
linking will make it automatically available to the linked containers. The
@ -50,6 +50,26 @@ default `postgres` user and database are created in the entrypoint with
docker run -it --link some-postgres:postgres --rm postgres sh -c 'exec psql -h "$POSTGRES_PORT_5432_TCP_ADDR" -p "$POSTGRES_PORT_5432_TCP_PORT" -U postgres'
## Environment Variables
The PostgreSQL image uses several environment variables which are easy to miss.
While none of the variables are required, they may significantly aid you in
using the image.
### `POSTGRES_PASSWORD`
This environment variable is recommend for you to use the PostgreSQL image. This
environment variable sets the superuser password for PostgreSQL. The default
superuser is defined by the `POSTGRES_USER` environment variable. In the above
example, it is being set to "mysecretpassword".
### `POSTGRES_USER`
This optional environment variable is used in conjunction with
`POSTGRES_PASSWORD` to set a user and its password. This varible will create the
specified user with superuser power and a database with the same name. If it is
not specified, then the default user of `postgres` will be used.
# How to extend this image
If you would like to do additional initialization in an image derived from this