Integration test to verify backwards compatibility

With multistage deployments we have both old and a new versions
of the praefect service running and sharing the same database.
We must be sure the changes done to the database schema doesn't
affect the old version of the praefect functionality and it
operates without issues.

The new job was added to the pipeline to verify compatibility of
the previous release and latest changes done to schema migration.
The pipeline runs only if a new migration was added/modified.

Closes: https://gitlab.com/gitlab-org/gitaly/-/issues/3338

1 files changed, 6 insertions, 0 deletions

diff --git a/_support/get-previous-minor-release b/_support/get-previous-minor-release
new file mode 100755
index 000000000..eaea20d7e
--- /dev/null
+++ b/_support/get-previous-minor-release
@@ -0,0 +1,6 @@
+#!/usr/bin/env ruby
+
+File.open("VERSION").read.scan(/(\d+)\.(\d+).\d+.*/) { |major_str, minor_str|
+  major, minor = major_str.to_i, minor_str.to_i
+  puts minor - 1 >= 0 ? "v#{major}.#{minor-1}.0" : "v#{major-1}.10.0"
+}