Thanks both for your updates, I'll try to see if someone at Azure can
help.
** Changed in: ubuntu-advantage-tools (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/2034656
Title:
Update Ubuntu ESM cache only once daily?
Status in cloud-images:
New
Status in apt package in Ubuntu:
New
Status in ubuntu-advantage-tools package in Ubuntu:
Invalid
Bug description:
Hi,
We're seeing frequent alerts on the Ubuntu ESM archive servers due to
surges in requests. On two systems, I'm seeing this:
| Sep 6 05:47:16 machine-2 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 05:47:17 machine-2 systemd[1]: Finished Update the local ESM caches.
| Sep 6 10:49:35 machine-2 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 10:49:35 machine-2 systemd[1]: Finished Update the local ESM caches.
| Sep 6 17:17:16 machine-2 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 17:17:17 machine-2 systemd[1]: Finished Update the local ESM caches.
| Sep 6 23:47:16 machine-2 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 23:47:17 machine-2 systemd[1]: Finished Update the local ESM caches.
| Sep 7 01:55:02 machine-2 systemd[1]: Starting Update the local ESM
caches...
| Sep 7 01:55:02 machine-2 systemd[1]: Finished Update the local ESM caches.
On another:
| Sep 6 02:41:02 is-bastion-ps5 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 02:41:03 is-bastion-ps5 systemd[1]: Finished Update the local ESM
caches.
| Sep 6 09:02:40 is-bastion-ps5 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 09:02:41 is-bastion-ps5 systemd[1]: Finished Update the local ESM
caches.
| Sep 6 15:32:40 is-bastion-ps5 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 15:32:41 is-bastion-ps5 systemd[1]: Finished Update the local ESM
caches.
| Sep 6 22:02:40 is-bastion-ps5 systemd[1]: Starting Update the local ESM
caches...
| Sep 6 22:02:41 is-bastion-ps5 systemd[1]: Finished Update the local ESM
caches.
| Sep 7 04:32:40 is-bastion-ps5 systemd[1]: Starting Update the local ESM
caches...
| Sep 7 04:32:42 is-bastion-ps5 systemd[1]: Finished Update the local ESM
caches.
This is all from `/usr/lib/systemd/system/esm-cache.service` which
calls `/usr/lib/ubuntu-advantage/esm_cache.py`.
Can we please have this run less frequent? Perhaps only once daily
which aligns with APT and apt-daily-upgrade.service / unattended-
upgrades?
Perhaps check existence of a file and run if not, then age of that
same file and only run if it's older than a day?
I think, from what I can see, this may be triggered from
/lib/systemd/system/ua-timer.timer and /etc/apt/apt.conf.d/20apt-esm-
hook.conf?
See also LP:1554848 which was for APT.
On Trusty and Xenial clients we only seem to update daily, but the
problem is worse as it's a cron.daily job, so all clients fire
simultaneously - could we get this changed to a cron.d job with a
randomised firing time instead?
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