From e853f8a4e925f67db034036b74f0780a4031f55b Mon Sep 17 00:00:00 2001 From: doublebyte1 Date: Mon, 11 Dec 2017 16:16:39 +0100 Subject: [PATCH] - Updated example of how-to connect to a postgres database: - explain how-to connect to a postgres db, by IP/DNS or container name, using the POSTGRES_DB_HOST environment variable. - remove reference to legacy docker --link --- geonetwork/variant-postgres.md | 38 ++++++++++++++++++---------------- 1 file changed, 20 insertions(+), 18 deletions(-) diff --git a/geonetwork/variant-postgres.md b/geonetwork/variant-postgres.md index af892d8a0..e84e36820 100644 --- a/geonetwork/variant-postgres.md +++ b/geonetwork/variant-postgres.md @@ -8,28 +8,30 @@ In order to setup the connection from geonetwork, you **must** inject the follow If your postgres instance is listening on a non-standard port, you must also set that variable: - `POSTGRES_DB_PORT`: postgres port on your database server (defaults to `5432`) -### Linking to a postgres container +### Connecting to a postgres database -Linking to a postgres container, is pretty straightforward: - `--link :postgres` - -For instance, if you want to run the official image for postgres, you could launch it like this: - -```console -$ docker run --name some-postgres -p 5432:5432 -d postgres -``` - -And then you could launch geonetwork, linking to this container, and setting the required environment variables: - -```console -$ docker run --name geonetwork -d -p 8080:8080 --link some-postgres:postgres -e POSTGRES_DB_USERNAME=postgres -e POSTGRES_DB_PASSWORD=mysecretpassword geonetwork:postgres -``` - -### Connecting to a postgres instance - -If you want to connect to a postgres server running somewhere, you need to pass an extra environment variable, containing the IP address for this server (which could be localhost, if you are running it locally). - `POSTGRES_DB_HOST`: IP address of your database server +If you want to connect to a postgres server, you need to pass an extra environment variable, containing the IP address for this server (which could be localhost, if you are running it locally). - `POSTGRES_DB_HOST`: IP address of your database server For instance, if the server is running on `192.168.1.10`, on port `5434`, the username is `postgres` and the password is `mysecretpassword`: ```console $ docker run --name geonetwork -d -p 8080:8080 -e POSTGRES_DB_HOST=192.168.1.10 -e POSTGRES_DB_PORT=5434 -e POSTGRES_DB_USERNAME=postgres -e POSTGRES_DB_PASSWORD=mysecretpassword geonetwork:postgres ``` + +If you want to use the container name as `POSTGRES_DB_HOST`, just make sure that containers can discover each other, by **running them in the same user-defined network**. For instance, you can create a bridge network: + +```console +$ docker network create --driver bridge mynet +``` + +Then if you want to run the official image of postgres, using `$POSTGRES_DB_HOST` as container name, you could launch it like this: + +```console +$ docker run --name $POSTGRES_DB_HOST --network=mynet -d postgres +``` + +And then you could launch geonetwork, making sure you join the same network, and setting the required environment variables, including the `POSTGRES_DB_HOST`: + +```console +$ docker run --name geonetwork -d -p 8080:8080 --network=mynet -e POSTGRES_DB_HOST=$POSTGRES_DB_HOST -e POSTGRES_DB_PORT=5432 -e POSTGRES_DB_USERNAME=postgres -e POSTGRES_DB_PASSWORD=mysecretpassword geonetwork:postgres +```