Use Redis Sentinel in development

Author: palkan

.dockerdev/redis-sentinel/entrypoint.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+cp /redis/sentinel.conf.template /etc/sentinel.conf
+
+sed -i "s/\$SENTINEL_MASTER/$SENTINEL_MASTER/g" /etc/sentinel.conf
+sed -i "s/\$SENTINEL_QUORUM/$SENTINEL_QUORUM/g" /etc/sentinel.conf
+sed -i "s/\$SENTINEL_DOWN_AFTER/$SENTINEL_DOWN_AFTER/g" /etc/sentinel.conf
+sed -i "s/\$SENTINEL_FAILOVER/$SENTINEL_FAILOVER/g" /etc/sentinel.conf
+
+redis-server /etc/sentinel.conf --sentinel

.dockerdev/redis-sentinel/sentinel.conf.template

@@ -0,0 +1,10 @@
+port 26379
+
+dir /tmp
+
+requirepass "any_secret"
+
+sentinel monitor $SENTINEL_MASTER redis 6379 $SENTINEL_QUORUM
+sentinel down-after-milliseconds $SENTINEL_MASTER $SENTINEL_DOWN_AFTER
+sentinel parallel-syncs $SENTINEL_MASTER 1
+sentinel failover-timeout $SENTINEL_MASTER $SENTINEL_FAILOVER

Gemfile.lock

@@ -1,3 +1,11 @@
+GIT
+  remote: https://github.com/anycable/anycable.git
+  revision: 8d38b181928536154083f2f529d8821fc18cd5c0
+  specs:
+    anycable (1.0.0)
+      anyway_config (>= 1.4.2)
+      grpc (~> 1.17)
+
 GEM
   remote: https://rubygems.org/
   specs:

docker-compose.yml

@@ -34,6 +34,7 @@ x-backend: &backend
   environment: &backend_environment
     <<: *env
     REDIS_URL: redis://redis:6379/
+    ANYCABLE_REDIS_SENTINELS: :any_secret@redis-sentinel:26379
     DATABASE_URL: postgres://postgres:postgres@postgres:5432
     CHROME_URL: http://chrome:3333
     BOOTSNAP_CACHE_DIR: /usr/local/bundle/_bootsnap
@@ -66,6 +67,8 @@ services:
       <<: *backend_environment
       APP_HOST: anycable.test
       ANYCABLE_RPC_HOST: 0.0.0.0:50051
+      # Do not use sentinels in tests
+      ANYCABLE_REDIS_SENTINELS: ""
       CABLE_URL: "ws://ws.anycable.test:8080/cable"
     depends_on:
       <<: *backend_depends_on
@@ -83,12 +86,16 @@ services:
     command: bundle exec sidekiq -C config/sidekiq.yml
 
   ws: &ws
-    image: anycable/anycable-go:1.0
+    image: anycable/anycable-go:edge
     ports:
       - '8080:8080'
+    volumes:
+      - ./bin/:/usr/local/bin
     environment: &ws_environment
       ANYCABLE_HOST: "0.0.0.0"
       ANYCABLE_REDIS_URL: redis://redis:6379/0
+      ANYCABLE_REDIS_SENTINELS: :any_secret@redis-sentinel:26379
+      ANYCABLE_REDIS_SENTINEL_DISCOVERY_INTERVAL: 2
       ANYCABLE_RPC_HOST: anycable:50051
       ANYCABLE_DEBUG: 1
     depends_on:
@@ -148,6 +155,34 @@ services:
       timeout: 3s
       retries: 30
 
+  redis-slave:
+    image: redis:5.0-alpine
+    command: redis-server --slaveof redis 6379
+    depends_on:
+      redis:
+        condition: service_healthy
+    volumes:
+      - redis:/data
+
+  redis-sentinel:
+    image: redis:5.0-alpine
+    volumes:
+      - ./.dockerdev/redis-sentinel:/redis
+    working_dir: /redis
+    entrypoint: ./entrypoint.sh
+    environment:
+      SENTINEL_QUORUM: 2
+      SENTINEL_DOWN_AFTER: 1000
+      SENTINEL_FAILOVER: 1000
+      SENTINEL_MASTER: redis
+    ports:
+      - 26379
+    depends_on:
+      redis:
+        condition: service_started
+      redis-slave:
+        condition: service_started
+
   webpacker:
     <<: *app
     command: ./bin/webpack-dev-server