Shows how to prevent DEA from removing containers from crashed apps.

README.md

DANGER: this should be done in the test DEA installation.

🚫 this script/changes will remove all Warden containers from your DEA

leave-crashed-apps.diff

diff --git a/lib/container/container.rb b/lib/container/container.rb
index b7efde8..1ff5c4f 100644
--- a/lib/container/container.rb
+++ b/lib/container/container.rb
@@ -102,7 +102,7 @@ class Container
   def destroy!
     with_em do
       begin
-        call_with_retry(:app, ::Warden::Protocol::DestroyRequest.new(handle: handle))
+        # call_with_retry(:app, ::Warden::Protocol::DestroyRequest.new(handle: handle))
       rescue ::EM::Warden::Client::Error => error
         logger.warn("Error destroying container: #{error.message}")
       end
diff --git a/lib/dea/starting/instance_registry.rb b/lib/dea/starting/instance_registry.rb
index 4ae5418..0aa97c2 100644
--- a/lib/dea/starting/instance_registry.rb
+++ b/lib/dea/starting/instance_registry.rb
@@ -28,10 +28,10 @@ module Dea
 
     def start_reaper
       EM.add_periodic_timer(CRASHES_REAPER_INTERVAL_SECS) do
-        reap_orphaned_crashes
-        reap_crashes
-        reap_crashes_under_disk_pressure
-        reap_stopping
+        # reap_orphaned_crashes
+        # reap_crashes
+        # reap_crashes_under_disk_pressure
+        # reap_stopping
       end
     end
 
diff --git a/lib/dea/task.rb b/lib/dea/task.rb
index fcb7629..d4a93ad 100644
--- a/lib/dea/task.rb
+++ b/lib/dea/task.rb
@@ -65,7 +65,7 @@ module Dea
           request = ::Warden::Protocol::DestroyRequest.new(handle: container.handle)
 
           begin
-            container.call_with_retry(:app, request)
+            # container.call_with_retry(:app, request)
           rescue ::EM::Warden::Client::Error => error
             logger.warn("task.destroy.failed", error: error, backtrace: error.backtrace)
           end

patch-dea.sh

sudo apt-get update
sudo apt-get install git 

vi ~/leave-crashed-apps.diff # put diff data there

# go to DEA package and patch it
cd /var/vcap/jobs/dea_next/packages/dea_next
sudo git init 
sudo echo "go" > .gitignore
sudo git add --all
sudo git commit -m "initial state of DEA code"
sudo git apply ~/leave-crashed-apps.diff

# restart DAE
sudo /var/vcap/bosh/bin/monit -I restart dea_next