PostgreSQL deployment example (#3675)

* Add example Dockerfile and docker-compose.yml

* Update CHANGELOG.md

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Storage
 
 * Add PostgreSQL quota manager and storage backend by @robstradling in https://github.com/google/trillian/pull/3644
+* PostgreSQL deployment example by @robstradling in https://github.com/google/trillian/pull/3675
 
 ### Misc
 

examples/deployment/docker/db_server/postgresql/Dockerfile

@@ -0,0 +1,5 @@
+FROM postgres:latest
+
+# expects the build context to be: $GOPATH/src/github.com/google/trillian
+COPY storage/postgresql/schema/storage.sql /docker-entrypoint-initdb.d/storage.sql
+RUN chmod -R 775 /docker-entrypoint-initdb.d

examples/deployment/postgresql/docker-compose.yml

@@ -0,0 +1,52 @@
+version: '3.1'
+services:
+  postgresql:
+    build:
+      context: ../../..
+      dockerfile: examples/deployment/docker/db_server/postgresql/Dockerfile
+    environment:
+      - POSTGRES_HOST_AUTH_METHOD=trust
+      - POSTGRESQL_DATABASE=defaultdb
+      - POSTGRESQL_USER=test
+      - POSTGRESQL_PASSWORD=zaphod
+    restart: always # keep the PostgreSQL server running
+  trillian-log-server:
+    build:
+      context: ../../..
+      dockerfile: examples/deployment/docker/log_server/Dockerfile
+      args:
+        - GOFLAGS
+    command: [
+      "--quota_system=postgresql",
+      "--storage_system=postgresql",
+      "--postgresql_uri=postgresql:///defaultdb?host=localhost&user=test&password=zaphod",
+      "--rpc_endpoint=0.0.0.0:8090",
+      "--http_endpoint=0.0.0.0:8091",
+      "--alsologtostderr",
+    ]
+    restart: always # retry while PostgreSQL is starting up
+    ports:
+      - "8090:8090"
+      - "8091:8091"
+    depends_on:
+      - postgresql
+  trillian-log-signer:
+    build:
+      context: ../../..
+      dockerfile: examples/deployment/docker/log_signer/Dockerfile
+      args:
+        - GOFLAGS
+    command: [
+      "--quota_system=postgresql",
+      "--storage_system=postgresql",
+      "--postgresql_uri=postgresql:///defaultdb?host=localhost&user=test&password=zaphod",
+      "--rpc_endpoint=0.0.0.0:8090",
+      "--http_endpoint=0.0.0.0:8091",
+      "--force_master",
+      "--alsologtostderr",
+    ]
+    restart: always # retry while PostgreSQL is starting up
+    ports:
+      - "8092:8091"
+    depends_on:
+      - postgresql