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Commit b4cd2add7ad2e320c6ec1ec53a5ab391045cfc60

Authored by Rodrigo Souto
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.gitignore 0 → 100644
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  1 +db.pgdump*
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Dockerfile 0 → 100644
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  1 +FROM postgres:8.4
  2 +ADD init-db.sh /docker-entrypoint-initdb.d/
  3 +ADD db.pgdump /tmp/db.pgdump
  4 +ADD db.pgdump.globals /tmp/db.pgdump.globals
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README.md 0 → 100644
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  1 +# SPB Database Container
  2 +
  3 +This project allows the creation of a docker container running on Postgresql
  4 +8.4 and populated with the provided SPB dump. This container already exposes
  5 +the port 5432 so you may link it with other docker containers. If you wish to
  6 +access the database from your host machine you still need to use the -p
  7 +parameter to forward the port.
  8 +
  9 +## Building the image
  10 +
  11 +To build the image you need to provide 2 sql files:
  12 +* db.pgdump: the plain sql from spb database which you can generate with a `pg_dump -t table1 -t table2 ... > db.pgdump`
  13 +* db.pgdump.globals: the globals from the database which you can generate with a `pg_dumpall --globals-only > db.pgdump.globals`
  14 +
  15 +Then run:
  16 +```shell
  17 +# docker build . -t <image-name>
  18 +```
  19 +
  20 +## Running the image
  21 +
  22 +To run the image you just need to execute:
  23 +```shell
  24 +# docker run -d <image-name>
  25 +```
  26 +
  27 +The -d option will run the container as a daemon
  28 +
  29 +## Running the image to access it from the host machine
  30 +
  31 +```shell
  32 +# docker run -d -p <container-port>:<host-port> <image-name>
  33 +```
  34 +
  35 +Now you can access the database from your host machine on <host-port>.
  36 +
  37 +## Linking the container with other containers
  38 +
  39 +To link the container with other containers, run:
  40 +```shell
  41 +# docker run -d --name <alias> <image-name>
  42 +```
  43 +
  44 +Now to connect this container with other container you just need to run:
  45 +```shell
  46 +# docker run -d --name <alias> <image-name>
  47 +# docker run --link <alias>:<alias> <another-image>
  48 +```
  49 +
  50 +After this, your second container will have access to the database through host
  51 +defined as the environment variable `<ALIAS>_PORT_5432_TCP_ADDR` and port
  52 +`<ALIAS>_PORT_5432_TCP_PORT`.
  53 +
  54 +E.g: if I use the alias `db` for my database container, on the other container
  55 +I would provided with `DB_PORT_5432_TCP_ADDR` and `DB_PORT_5432_TCP_PORT`
  56 +environment variables. With this information I could access the database with a simple:
  57 +```shell
  58 +$ psql -h "$DB_PORT_5432_TCP_ADDR" -p "$DB_PORT_5432_TCP_PORT" -U postgres -d spb
  59 +```
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init-db.sh 0 → 100644
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  1 +++ a/init-db.sh
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  1 +#!/bin/bash
  2 +
  3 +: ${DB_USER:=service0}
  4 +: ${DB_NAME:=spb}
  5 +: ${DB_ENCODING:=UTF-8}
  6 +: ${DB_PG_DUMP_FILE:=/tmp/db.pgdump}
  7 +: ${DB_PG_DUMP_GLOBALS_FILE:=/tmp/db.pgdump.globals}
  8 +
  9 +{ gosu postgres postgres --single -jE <<-EOSQL
  10 + CREATE USER "$DB_USER";
  11 +EOSQL
  12 +} && { gosu postgres postgres --single -jE <<-EOSQL
  13 + CREATE DATABASE "$DB_NAME" WITH OWNER="$DB_USER" TEMPLATE=template0 ENCODING='$DB_ENCODING';
  14 +EOSQL
  15 +} && { gosu postgres pg_ctl start -w && gosu postgres psql "$DB_NAME" -f "$DB_PG_DUMP_GLOBALS_FILE" && gosu postgres psql "$DB_NAME" < "$DB_PG_DUMP_FILE" && gosu postgres pg_ctl stop -w
  16 +} && /bin/rm -f ${DB_PG_DUMP_FILE}
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