Ubuntu 16.04环境下如何配置ZFS ZED使用容器内Postfix邮件服务器

Got it, let's walk through getting ZFS ZED (ZFS Event Daemon) to send disk failure alerts via your Postfix server running in an LXD container. Here's a step-by-step guide tailored to your setup:

1. Ensure ZFS ZED is Installed #

First, confirm the ZED package is installed on your Ubuntu 16.04 host. If not, install it with:

sudo apt update && sudo apt install zfs-zed

2. Get Your Postfix Container's IP Address #

You'll need the internal IP of your LXD container to point ZED to it. Run this command to list your containers and their IPs:

lxc list

Note down the IP (e.g., 10.0.3.10) for your Postfix container.

3. Edit the ZED Configuration File #

ZED's main config is located at /etc/zfs/zed.d/zed.rc. Open it in your favorite editor:

sudo nano /etc/zfs/zed.d/zed.rc

Update these key variables to match your setup:

• Set alert recipients: Replace with the email address where you want to receive ZFS alerts:

  ZED_EMAIL_ADDR="your-alert-recipient@example.com"
  

• Set the sender address: This will be the "from" address on alert emails:

  ZED_EMAIL_FROM="zfs-alerts@your-domain.com"
  

• Point to your Postfix container: Override the default email program to send directly to your container's port 1478. Use either of these options:
  Option 1: Use sendmail with a custom server/port (simple, no extra packages):

  ZED_EMAIL_PROG="sendmail -S [YOUR_CONTAINER_IP]:1478"
  

  Option 2: Use ssmtp (more configurable, requires installing the package first):
  1. Install ssmtp:

     sudo apt install ssmtp
     

  2. Edit /etc/ssmtp/ssmtp.conf to point to your container:

     root=zfs-alerts@your-domain.com
     mailhub=[YOUR_CONTAINER_IP]:1478
     FromLineOverride=YES
     

  3. Update ZED's email program to use ssmtp:

     ZED_EMAIL_PROG="ssmtp"
     

• Enable verbose alerts (optional but recommended for disk failure notifications):

  ZED_NOTIFY_VERBOSE=1
  

Save and close the file when you're done.

4. Start and Enable the ZED Service #

Make sure ZED runs on boot and starts immediately:

sudo systemctl enable zed
sudo systemctl start zed

5. Test the Setup #

To verify everything works, trigger a ZFS event (like starting a scrub on a pool) and check if you receive an alert email:

zpool scrub [YOUR_ZFS_POOL_NAME]

You can also check ZED's logs for any errors:

tail -f /var/log/zfs/zed.log

Important Notes #

• Network Access: Ensure your Ubuntu host can reach the Postfix container's 1478 port. Check LXD's network settings (e.g., container profile firewall rules) if you run into connectivity issues.
• Postfix Configuration: Double-check your container's Postfix setup allows incoming mail from the host IP, and that it's configured to relay emails to your external recipient if needed.

内容的提问来源于stack exchange，提问作者OmerSakar