first cut at redis (#2226)

* first cut at redis

* fix startup dependencies on redis

* kombu cleanup - fail silently

* mypy

* add redis_host environment override

* update REDIS_HOST env var in docker-compose.dev.yml

* update the rest of the docker files

* update contributing guide

* renaming cache to cache_volume

* add redis password to various deployments

* try setting up pr testing for helm

* fix indent

* hopefully this release version actually exists

* fix command line option to --chart-dirs

* fetch-depth 0

* edit values.yaml

* try setting ct working directory

* bypass testing only on change for now

* move files and lint them

* update helm testing

* some issues suggest using --config works

* add vespa repo

* add postgresql repo

* increase timeout

* try amd64 runner

* fix redis password reference

* add comment to helm chart testing workflow

* rename helm testing workflow to disable it

---------

Co-authored-by: Richard Kuo <rkuo@rkuo.com>

deployment/docker_compose/docker-compose.gpu-dev.yml

@@ -12,6 +12,7 @@ services:
     depends_on:
       - relational_db
       - index
+      - cache
       - inference_model_server
     restart: always
     ports:
@@ -58,6 +59,7 @@ services:
       # Other services
       - POSTGRES_HOST=relational_db
       - VESPA_HOST=index
+      - REDIS_HOST=cache      
       - WEB_DOMAIN=${WEB_DOMAIN:-}  # For frontend redirect auth purpose
       # Don't change the NLP model configs unless you know what you're doing
       - DOCUMENT_ENCODER_MODEL=${DOCUMENT_ENCODER_MODEL:-}
@@ -99,6 +101,7 @@ services:
     depends_on:
       - relational_db
       - index
+      - cache
       - inference_model_server
       - indexing_model_server
     restart: always
@@ -129,6 +132,7 @@ services:
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-}
       - POSTGRES_DB=${POSTGRES_DB:-}
       - VESPA_HOST=index
+      - REDIS_HOST=cache
       - WEB_DOMAIN=${WEB_DOMAIN:-}  # For frontend redirect auth purpose for OAuth2 connectors
       # Don't change the NLP model configs unless you know what you're doing
       - DOCUMENT_ENCODER_MODEL=${DOCUMENT_ENCODER_MODEL:-}
@@ -341,9 +345,20 @@ services:
     command: > 
       /bin/sh -c "dos2unix /etc/nginx/conf.d/run-nginx.sh 
       && /etc/nginx/conf.d/run-nginx.sh app.conf.template.dev"
-        
+
+
+  cache:
+    image: redis:7.4-alpine
+    restart: always
+    ports:
+      - '6379:6379'
+    command: redis-server
+    volumes: 
+      - cache_volume:/data
+
 
 volumes:
+  cache_volume:
   db_volume:
   vespa_volume:
   # Created by the container itself