Redis配置持续自动重置，未重启Docker容器仍恢复原值求助

Let's break down possible reasons why your Redis dir setting keeps reverting to /etc/crontabs even without restarting the container, and how to fix them:

1. Missing CONFIG REWRITE After CONFIG SET #

When you run CONFIG SET dir "/data", this only modifies the running in-memory configuration of Redis—it doesn’t save the change to your actual config file. If any process triggers Redis to reload its config file (like a SIGHUP signal sent to the Redis process), it will fall back to the original value from the file.

To lock in the change:

• Right after running CONFIG SET dir "/data", execute this command to write the running config back to your Redis config file:

  redis-cli CONFIG REWRITE
  

This ensures future config reloads will use your new dir value instead of the old one.

2. Check for Automated Crontab Scripts #

Since the reverted path is /etc/crontabs, there’s a strong chance a scheduled task in your container is overriding the Redis config. Here’s how to investigate:

• Enter your Redis container to inspect crontabs:

  docker exec -it <your-redis-container-id> /bin/bash
  

• List all active cron jobs:

  crontab -l
  

• Check the /etc/crontabs directory for scripts that might run redis-cli commands to reset the dir setting:

  ls -la /etc/crontabs
  cat /etc/crontabs/*
  

If you find a script that’s modifying the Redis config, either update it to stop changing the dir value or remove the cron job entirely.

3. Verify Docker Volume Mounts and Config File Integrity #

If you’re starting the container with a custom config file, double-check these details:

• Ensure your custom config file is correctly mounted into the container (review your docker run command or docker-compose.yml volume settings). A broken mount could mean Redis is using a default config file instead of your custom one.
• Confirm the dir directive in your config file is set to /data (not /etc/crontabs). Check the file content inside the container:

  cat /path/to/your/redis.conf | grep "dir "
  

• Make sure the Redis process has write permissions to the config file (so CONFIG REWRITE can work properly). Check permissions with:

  ls -la /path/to/your/redis.conf
  

4. Rule Out External Config Sync Tools #

If your Docker environment uses tools like Consul, etcd, or a custom configuration sync service, these might be periodically pushing a default config to Redis. Verify if any such tools are running alongside your container and adjust their settings to preserve your dir configuration.

内容的提问来源于stack exchange，提问作者sukidesuaoi