Allow `rake cache:clear` clearing pipeline status cache

* Use the correct key prefix
* Clear old cache keys

TODO:

At some point we could remove clearing old cache keys.

1 files changed, 14 insertions, 9 deletions

diff --git a/lib/tasks/cache.rake b/lib/tasks/cache.rake
index 564aa141952..cb4d5abffbc 100644
--- a/lib/tasks/cache.rake
+++ b/lib/tasks/cache.rake
@@ -6,17 +6,22 @@ namespace :cache do
     desc "GitLab | Clear redis cache"
     task redis: :environment do
       Gitlab::Redis::Cache.with do |redis|
-        cursor = REDIS_SCAN_START_STOP
-        loop do
-          cursor, keys = redis.scan(
-            cursor,
-            match: "#{Gitlab::Redis::Cache::CACHE_NAMESPACE}*",
-            count: REDIS_CLEAR_BATCH_SIZE
-          )
+        cache_key_pattern = %W[#{Gitlab::Redis::Cache::CACHE_NAMESPACE}*
+                               projects/*/pipeline_status]
 
-          redis.del(*keys) if keys.any?
+        cache_key_pattern.each do |match|
+          cursor = REDIS_SCAN_START_STOP
+          loop do
+            cursor, keys = redis.scan(
+              cursor,
+              match: match,
+              count: REDIS_CLEAR_BATCH_SIZE
+            )
 
-          break if cursor == REDIS_SCAN_START_STOP
+            redis.del(*keys) if keys.any?
+
+            break if cursor == REDIS_SCAN_START_STOP
+          end
         end
       end
     end