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如何使用systemd運行多個redis實例

tag-icon • tag-icon debian systemd redis multiple-instances
如何使用systemd運行多個redis實例

我最近轉移到 Debian 8“Jessie”，它現在使用 systemd，但我找不到運行多個 Redis 實例的方法。

我發現有一個/lib/systemd/system/redis-server.service檔案可以在重新啟動時啟動redis-server。所以我創建了一個/lib/systemd/system/redis-server-2.service包含以下內容的新檔案呼叫：

[Unit]
Description=Advanced key-value store
After=network.target

[Service]
Type=forking
ExecStart=/usr/bin/redis-server /etc/redis/redis-2.conf
TimeoutStopSec=0
Restart=always
User=redis
Group=redis

[Install]
WantedBy=multi-user.target

但是當我嘗試像這樣啟動服務時：service redis-server-2 start我收到此錯誤：

Job for redis-server-2.service failed. See 'systemctl status redis-server-2.service' and 'journalctl -xn' for details.

並systemctl status redis-server-2.service給我：

● redis-server-2.service - Advanced key-value store
   Loaded: loaded (/lib/systemd/system/redis-server-2.service; disabled)
   Active: failed (Result: start-limit) since Sat 2015-10-10 11:09:54 CEST; 33s ago
  Process: 2473 ExecStart=/usr/bin/redis-server /etc/redis/redis-2.conf (code=exited, status=1/FAILURE)
 Main PID: 2371 (code=exited, status=1/FAILURE)

Oct 10 11:09:54 server101 systemd[1]: redis-server-2.service: control process exited, code=exited status=1
Oct 10 11:09:54 server101 systemd[1]: Failed to start Advanced key-value store.
Oct 10 11:09:54 server101 systemd[1]: Unit redis-server-2.service entered failed state.
Oct 10 11:09:54 server101 systemd[1]: redis-server-2.service start request repeated too quickly, refusing to start.
Oct 10 11:09:54 server101 systemd[1]: Failed to start Advanced key-value store.
Oct 10 11:09:54 server101 systemd[1]: Unit redis-server-2.service entered failed state.

這並沒有真正幫助我。

但是如果我運行/usr/bin/redis-server /etc/redis/redis-2.conf我的 redis 實例就可以正確啟動。

那你知道為什麼 systemd 不自己啟動這個實例嗎？

先謝謝您的幫忙。

答案1

正如邁克爾漢普頓（Michael Hampton）的建議，我檢查了系統日誌，發現：

Oct 10 11:33:46 server101 redis-server[1947]: *** FATAL CONFIG FILE ERROR ***
Oct 10 11:33:46 server101 redis-server[1947]: Reading the configuration file, at line 5
Oct 10 11:33:46 server101 redis-server[1947]: >>> 'logfile /var/log/redis/redis-server-2.log'
Oct 10 11:33:46 server101 redis-server[1947]: Can't open the log file: Permission denied

所以我只需要這樣做來解決這個問題：

chown redis:redis /var/log/redis/redis-server-2.log

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