I followed the instructions here: http://docs.docker4wordpress.org/en/latest/containers/redis/, but wordpress cannot connect to the redis instance. I've tried on a fresh ubuntu installation and docker for windows. I am a docker newbie, so there may be some obvious setup that is implied that I have missed.

here is the docker-compose.yml:

version: "2"

services:
  mariadb:
    image: wodby/mariadb:10.1-2.1.0
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wordpress
      MYSQL_PASSWORD: wordpress
    volumes:
#      - ./mariadb-init:/docker-entrypoint-initdb.d # Place init .sql file(s) here.
      - ./mysql:/var/lib/mysql # I want to manage volumes manually.

  php:
#    image: wodby/wordpress:4-7.1-2.1.0
#    image: wodby/wordpress:4-7.0-2.1.0
#    image: wodby/wordpress-php:7.0-2.1.0
    image: wodby/wordpress-php:7.1-2.1.0
    environment:
      PHP_SENDMAIL_PATH: /usr/sbin/sendmail -t -i -S mailhog:1025
      # PHP_XDEBUG: 1
      # PHP_XDEBUG_DEFAULT_ENABLE: 1
      # PHP_XDEBUG_REMOTE_CONNECT_BACK: 0         # This is needed to respect remote.host setting bellow
      # PHP_XDEBUG_REMOTE_HOST: "10.254.254.254"  # You will also need to 'sudo ifconfig lo0 alias 10.254.254.254'
    volumes:
      - ./wordpress:/var/www/html
#      - d4d-unison-sync:/var/www/html # Docker-sync for macOS users

  nginx:
    image: wodby/wordpress-nginx:4-1.10-2.1.0
    environment:
      NGINX_STATIC_CONTENT_OPEN_FILE_CACHE: "off"
      NGINX_ERROR_LOG_LEVEL: debug
      NGINX_BACKEND_HOST: php
      NGINX_SERVER_ROOT: /var/www/html/
    volumes:
      - ./wordpress:/var/www/html
#      - d4d-unison-sync:/var/www/html # Docker-sync for macOS users
    depends_on:
      - php
    labels:
      - 'traefik.backend=nginx'
      - 'traefik.port=80'
      - 'traefik.frontend.rule=Host:wp.docker.localhost'

  varnish:
    image: wodby/wordpress-varnish:4.1-2.1.0
    depends_on:
      - nginx
    environment:
      VARNISH_SECRET: secret
      VARNISH_BACKEND_HOST: nginx
      VARNISH_BACKEND_PORT: 80
    labels:
      - 'traefik.backend=varnish'
      - 'traefik.port=6081'
      - 'traefik.frontend.rule=Host:varnish.wp.docker.localhost'

  redis:
    image: wodby/redis:3.2-2.1.0
    volumes:
      - ./redis:/data

  pma:
    image: phpmyadmin/phpmyadmin
    environment:
      PMA_HOST: mariadb
      PMA_USER: wordpress
      PMA_PASSWORD: wordpress
      PHP_UPLOAD_MAX_FILESIZE: 1G
      PHP_MAX_INPUT_VARS: 1G
    labels:
      - 'traefik.backend=pma'
      - 'traefik.port=80'
      - 'traefik.frontend.rule=Host:pma.wp.docker.localhost'

  mailhog:
    image: mailhog/mailhog
    labels:
      - 'traefik.backend=mailhog'
      - 'traefik.port=8025'
      - 'traefik.frontend.rule=Host:mailhog.wp.docker.localhost'

  traefik:
    image: traefik
    command: -c /dev/null --web --docker --logLevel=INFO
    ports:
      - '8000:80'
      - '8080:8080' # Dashboard
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

I would like to install redis on my docker4drupal website,

but I can't get the configuration in documentation, I install the module redis for drupal, whas is the correct configuration ?

Thanks

I'm running this container using Docksal, and it's not working because I'm using an M1 MacBook Pro, which has an ARM processor, and this container is AMD64.

The error it throws is:

runtime: failed to create new OS thread (have 2 already; errno=22)
fatal error: newosproc

And then a big stack trace, which I can paste in here if that would be helpful.

Problem

The default redis configuration conflicts with the expected behavior of REDIS_SAVE_TO_DISK.

Currently when this container is run without setting REDIS_SAVE_TO_DISK redis will still try to dump it's content to the disk, causing slowdowns because of the default configuration:

Unless specified otherwise, by default Redis will save the DB:

• After 3600 seconds (an hour) if at least 1 change was performed
• After 300 seconds (5 minutes) if at least 100 changes were performed
• After 60 seconds if at least 10000 changes were performed

Source: https://raw.githubusercontent.com/redis/redis/7.0/redis.conf

User Story

As a user I want to run this redis container without dumping the db content to disk.

This should be archived using a command similar to the following:

docker run -d -p 6379 wodby/redis:7

Expected outcome

Redis does not dump the data to disk, because REDIS_SAVE_TO_DISK is not set.

Actual outcome

The data is dumped to disk based on the default save configuration.

I am running Redis in global mode for a swarm setup and have some performance issues.

I am looking at the logs and I have this going on as well, which may or not be related:

1:M 24 Apr 22:03:10.486 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.,
1:M 24 Apr 22:03:10.486 # Server started, Redis version 3.2.8,
1:M 24 Apr 22:03:10.486 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.,
1:M 24 Apr 22:03:10.486 * The server is now ready to accept connections on port 6379,
1:M 24 Apr 22:03:10.486 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.

Any thoughts?