snapd 在 openSUSE Leap 15.1 上失敗

根據本文件，我已經在我的 openSUSE Leap 15.1 系統上安裝並啟用了 snappy：https ://snapcraft.io/docs/installing-snap-on-opensuse

添加儲存庫時，我為我的特定版本使用了一個：https ://download.opensuse.org/repositories/system:/snappy/openSUSE_Leap_15.1/

但是，在啟用該服務後，它在我啟動它幾秒鐘後一直以退出程式碼 42 崩潰。插座似乎沒問題：

opensuse:~ # systemctl status snapd.socket
● snapd.socket - Socket activation for snappy daemon
  Loaded: loaded (/usr/lib/systemd/system/snapd.socket; disabled; vendor preset: disabled)
  Active: active (listening) since Tue 2019-12-31 15:22:47 CET; 1h 58min ago
  Listen: /run/snapd.socket (Stream)
          /run/snapd-snap.socket (Stream)

Dec 31 15:22:47 opensuse systemd[1]: Starting Socket activation for snappy daemon.
Dec 31 15:22:47 opensuse systemd[1]: Listening on Socket activation for snappy daemon.

當我手動啟動 snapd.service 時，它在啟動後立即顯示正常：

opensuse:~ # systemctl status snapd.service
● snapd.service - Snappy daemon
  Loaded: loaded (/usr/lib/systemd/system/snapd.service; enabled; vendor preset: disabled)
  Active: active (running) since Tue 2019-12-31 17:23:34 CET; 999ms ago
Main PID: 3014 (snapd)
   Tasks: 10 (limit: 4915)
  CGroup: /system.slice/snapd.service
          └─3014 /usr/lib/snapd/snapd

Dec 31 17:23:34 opensuse systemd[1]: Starting Snappy daemon...
Dec 31 17:23:34 opensuse snapd[3014]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus
Dec 31 17:23:34 opensuse snapd[3014]: daemon.go:346: started snapd/2.42.4-lp151.1.1 (series 16; classic; devmode) opensuse-leap/15.1 (amd64) linux/4.12.14-lp151.28.36-defau.
Dec 31 17:23:34 opensuse snapd[3014]: daemon.go:439: adjusting startup timeout by 30s (pessimistic estimate of 30s plus 5s per snap)
Dec 31 17:23:34 opensuse systemd[1]: Started Snappy daemon.

但是，幾秒鐘後它失敗了：

opensuse:~ # systemctl status snapd.service
● snapd.service - Snappy daemon
  Loaded: loaded (/usr/lib/systemd/system/snapd.service; enabled; vendor preset: disabled)
  Active: inactive (dead) since Tue 2019-12-31 17:23:39 CET; 36s ago
 Process: 3014 ExecStart=/usr/lib/snapd/snapd (code=exited, status=42)
Main PID: 3014 (code=exited, status=42)

Dec 31 17:23:34 opensuse systemd[1]: Starting Snappy daemon...
Dec 31 17:23:34 opensuse snapd[3014]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus
Dec 31 17:23:34 opensuse snapd[3014]: daemon.go:346: started snapd/2.42.4-lp151.1.1 (series 16; classic; devmode) opensuse-leap/15.1 (amd64) linux/4.12.14-lp151.28.36-defau.
Dec 31 17:23:34 opensuse snapd[3014]: daemon.go:439: adjusting startup timeout by 30s (pessimistic estimate of 30s plus 5s per snap)
Dec 31 17:23:34 opensuse systemd[1]: Started Snappy daemon.
Dec 31 17:23:39 opensuse snapd[3014]: daemon.go:540: gracefully waiting for running hooks
Dec 31 17:23:39 opensuse snapd[3014]: daemon.go:542: done waiting for running hooks
Dec 31 17:23:39 opensuse snapd[3014]: daemon stop requested to wait for socket activation

直接執行 /usr/lib/snapd/snapd 給我：

opensuse:~ # /usr/lib/snapd/snapd
AppArmor status: apparmor is enabled but some kernel features are missing: dbus
cannot run daemon: when trying to listen on /run/snapd.socket: socket "/run/snapd.socket" already in use

做什麼？

沒關係，找到了（我想）。顯然，該服務僅在安裝任何快照時才繼續執行。由於我還沒有安裝任何快照，它在啟動後自行終止。安裝第一個 snap 後，snapd 一直在後台執行。

為了安裝，首先你必須停止守護程序：

systemctl stop snapd.socket

然後進行實際安裝；否則，將出現最初發布的錯誤（無法執行守護程序）。

引用自：https://unix.stackexchange.com/questions/559714