From 321e8850ed28529f424ffb0f2ef72130075ebc4c Mon Sep 17 00:00:00 2001
From: Colleen Murphy <colleenmurphy@google.com>
Date: Tue, 6 Feb 2024 10:49:41 -0800
Subject: [PATCH] Add persistent volume for mysql

The ctfe_init container uses a persistent volume to store the tree head
ID among other things from previous runs. However, the mysql container
is not guaranteed to reuse the same data directory when it is destroyed
and recreated, so it may come up empty. When this happens, but the CT
log is configured for an existing tree, then signing objects will fail
with a Not Found error. This change adds a persistent volume to the
docker-compose file for mysql so that the database can live on and be
consistent with the CT log's configuration.
---
 docker-compose.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docker-compose.yml b/docker-compose.yml
index 124a9ec5b..cee2a6410 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -109,6 +109,8 @@ services:
       timeout: 3s
       retries: 3
       start_period: 10s
+    volumes:
+      - mysql:/var/lib/mysql
   trillian-log-server:
     image: gcr.io/trillian-opensource-ci/log_server
     command: [
@@ -141,3 +143,4 @@ services:
       - mysql
 volumes:
   ctfeConfig: {}
+  mysql: {}