再びインスタンスのUbuntu20.04TSLがエラーで停止してしまった。
syslogを見ると
autorefresh.go:398: Cannot prepare auto-refresh change due to a permanent network error: persistent network error: Get https://api.snapcraft.io/api/v1/snaps/assertions/snap-declaration/16/CSO04Jhav2yK0uz97cr0ipQRyqg0qQL6?max-format=4: dial tcp: lookup api.snapcraft.io: Temporary failure in name resolution stateengine.go:150: state ensure error: persistent network error: Get https://api.snapcraft.io/api/v1/snaps/assertions/snap-declaration/16/CSO04Jhav2yK0uz97cr0ipQRyqg0qQL6?max-format=4: dial tcp: lookup api.snapcraft.io: Temporary failure in name resolution
とメッセージが続いたあと全てのサービスがstopしている。
調べてみたが他でも多発している様子がどれも20.04のようだ。AWSのフォーラムにこの問題の提起がされているが解決していないみたい。何だろこれ？
何かネットワークエラーで更新の準備ができないってのと名前解決できないって言ってる。でもこれの後に全てのサービスがStoppingしているなぜ？
Removed slice system-modprobe.slice. Stopped target Cloud-init target. Stopped target Graphical Interface. Stopped target Timers. apt-daily-upgrade.timer: Succeeded. Stopped Daily apt upgrade and clean activities. apt-daily.timer: Succeeded. Stopped Daily apt download activities. e2scrub_all.timer: Succeeded. Stopped Periodic ext4 Online Metadata Check for All Filesystems. fstrim.timer: Succeeded. Stopped Discard unused blocks once a week. fwupd-refresh.timer: Succeeded. Stopped Refresh fwupd metadata regularly. logrotate.timer: Succeeded. Stopped Daily rotation of log files. man-db.timer: Succeeded. Stopped Daily man-db regeneration. motd-news.timer: Succeeded. Stopped Message of the Day. phpsessionclean.timer: Succeeded. Stopped Clean PHP session files every 30 mins. snap.certbot.renew.timer: Succeeded. Stopped Timer renew for snap application certbot.renew. systemd-tmpfiles-clean.timer: Succeeded. Stopped Daily Cleanup of Temporary Directories. Stopped target System Time Synchronized. Stopped target System Time Set. lvm2-lvmpolld.socket: Succeeded. Closed LVM2 poll daemon socket. systemd-rfkill.socket: Succeeded. Closed Load/Save RF Kill Switch Status /dev/rfkill Watch. Stopping Accounts Service... Stopping ACPI event daemon... Stopping Availability of block devices... cloud-final.service: Succeeded. Stopped Execute cloud user/final scripts. Stopped target Multi-User System. Stopped target Login Prompts. Nov 8 01:23:29 ip-172-31-0-104 blkdeactivate[237819]: Deactivating block devices: Stopping The Apache HTTP Server... Stopping LSB: automatic crash report generation... Stopping Deferred execution scheduler... cloud-config.service: Succeeded. Stopped Apply the settings specified in cloud-config. Stopped target Cloud-config availability. Stopping Regular background program processing daemon... Stopping Dovecot IMAP/POP3 email server... Stopping Create final runtime dir for shutdown pivot root... Stopping Firmware update daemon... Nov 8 01:23:29 ip-172-31-0-104 dovecot: master: Warning: Killed with signal 15 (by pid=237845 uid=0 code=kill) Stopping Getty on tty1... Stopping LSB: Record successful boot for GRUB... Stopping MySQL Community Server... Stopping Dispatcher daemon for systemd-networkd... Stopping The PHP 7.4 FastCGI Process Manager... Stopping Authorization Manager... postfix.service: Succeeded. Stopped Postfix Mail Transport Agent. Stopping Postfix Mail Transport Agent (instance -)...