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authorMichael Vogt <mvo@ubuntu.com>2016-03-17 08:56:58 +0100
committerMichael Vogt <mvo@debian.org>2016-04-01 13:02:39 +0200
commit14669d4b95f0f6a9b215d7fa5aebbc3b7198585d (patch)
treef22ee5dda27ea2a6fb3ee7bf07a553fbb5cd3d41 /doc
parent6a4958d3134a3a61c036bc9ccaccc393c2bb99f2 (diff)
Use systemd.timer instead of a cron job
The rational is that we need to spread the load on the mirrors that apt update and unattended-upgrades cause. To do so, we leverage the RandomizeDelay feature of systemd. The other advantage is that the timer is not run at a fixed daily.daily time but instead every 24h. This also fixes the problem that the randomized deplay in the current apt.cron.daily causes other cron jobs to be deplayed. A compatibility cron job is also provided for systems that do not use systemd. Note that the time is fired two times a day, but the logic inside of apt.systemd.daily will ensure (via stamp files) that the servers are hit at most every 24h. Firing two times a day helps with the worst case update time and it also helps with systems that are not always on. LP: #246381, #727685 Closes: #600262, #709675, #663290
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