This guide covers configuring continuous integration pipelines for projects that have a Postgres dependency. If you’re new to Drone please read our Tutorial and build configuration guides first.

Basic Example

In the below example we demonstrate a pipeline that launches a Postgres service container. The database server will be available at database:5432, where the hostname matches the service container name.

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kind: pipeline
name: default

steps:
- name: test
  image: postgres:9-alpine
  commands:
  - psql -U postgres -d test -h database

services:
- name: database
  image: postgres:9-alpine
  environment:
    POSTGRES_USER: postgres
    POSTGRES_DB: test

Database Settings

The official Postgres image provides environment variables used at startup to create the default username, password, database and more. Please see the official image documentation for more details.

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services:
- name: database
  image: postgres
  environment:
    POSTGRES_USER: postgres
    POSTGRES_DB: test

Common Problems

Initialization

If you are unable to connect to the Postgres container please make sure you are giving Postgres adequate time to initialize and begin accepting connections.

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kind: pipeline
name: default

steps:
- name: test
  image: postgres
  commands:
  - sleep 15
  - psql -U postgres -d test -h database

Incorrect Hostname

You cannot use 127.0.0.1 or localhost to connect with the Postgres container. If you are unable to connect to the Postgres container please verify you are using the correct hostname, corresponding with the name of the postgres service container.

Bad:

steps:
- name: test
  image: postgres
  commands:
  - sleep 15
  - psql -U postgres -d test -h localhost

Good:

steps:
- name: test
  image: postgres
  commands:
  - sleep 15
  - psql -U postgres -d test -h database