[RFC PATCH] docker: Add support for using eatmydata in the database

[Russell Currey]

When running tox on a VM with presumably pretty busy spinning disks,
using eatmydata with the database took running one configuration's test
suite from (no exaggeration) 20 minutes down to 60 seconds.

It makes a huge difference to test speed, so we should make it easily
available for developers.  The primary motivation here was to
automatically test each patch in a timeframe that isn't insane.

Open to ideas on how to organise this, whether we do it for MySQL too
(which we probably should), whether the base directory should have these
files in it, what to call the Dockerfile, etc.  I think it's a good
thing to have in the repo, though.

Signed-off-by: Russell Currey <ruscur at russell.cc>
---
 docker-compose-eatmydata.yml      | 32 +++++++++++++++++++++++++++++++
 tools/docker/Dockerfile.eatmydata |  9 +++++++++
 2 files changed, 41 insertions(+)
 create mode 100644 docker-compose-eatmydata.yml
 create mode 100644 tools/docker/Dockerfile.eatmydata

diff --git a/docker-compose-eatmydata.yml b/docker-compose-eatmydata.yml
new file mode 100644
index 0000000..27d1604
--- /dev/null
+++ b/docker-compose-eatmydata.yml
@@ -0,0 +1,32 @@
+version: "3"
+services:
+  db:
+    build:
+      context: .
+      dockerfile: ./tools/docker/Dockerfile.eatmydata
+    volumes:
+      - ./tools/docker/db/postdata:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_PASSWORD=password
+
+  web:
+    build:
+      context: .
+      dockerfile: ./tools/docker/Dockerfile
+      args:
+        - UID
+    depends_on:
+      - db
+    command: python3 manage.py runserver 0.0.0.0:8000
+    volumes:
+      - .:/home/patchwork/patchwork/
+    ports:
+      - "8000:8000"
+    environment:
+      - UID
+      - PW_TEST_DB_HOST=db
+      - PW_TEST_DB_PORT=5432
+      - PW_TEST_DB_TYPE=postgres
+      - PW_TEST_DB_USER=postgres
+      - PW_TEST_DB_PASS=password
+      - PGPASSWORD=password
diff --git a/tools/docker/Dockerfile.eatmydata b/tools/docker/Dockerfile.eatmydata
new file mode 100644
index 0000000..693cbb3
--- /dev/null
+++ b/tools/docker/Dockerfile.eatmydata
@@ -0,0 +1,9 @@
+FROM postgres:9.6
+
+RUN apt-get update \
+ && apt-get install -y eatmydata \
+ && apt-get autoremove -y \
+ && rm -rf /var/lib/apt/lists/*
+
+ENTRYPOINT [ "/usr/bin/eatmydata", "/usr/local/bin/docker-entrypoint.sh" ]
+CMD ["postgres"]
-- 
2.21.0