Bug#926424: cloud-init: No log rotation

[Andrew Ruthven <andrew@etc.gen.nz>]

Package: cloud-init
Version: 18.3
Severity: wishlist
Tags: patch

Dear Maintainer,

The cloud-init system logs to the follow files:

 - /var/log/cloud-init-output.log
 - /var/log/cloud-init.log

There is nothing shipped which rotates these log files, which is a shame
as they'll grow everytime an instance is rebooted. We have some customers
with reasonably large log files now...

Please find attached a proposed logrotate file.

Cheers,
Andrew

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-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.0.0-trunk-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages cloud-init depends on:
ii  cloud-guest-utils   0.29-1
ii  fdisk               2.33.1-0.1
ii  gdisk               1.0.3-1.1
ii  ifupdown            0.8.35
ii  locales             2.28-8
ii  lsb-base            10.2019031300
ii  lsb-release         10.2019031300
ii  net-tools           1.60+git20180626.aebd88e-1
ii  procps              2:3.3.15-2
ii  python3             3.7.3-1
pn  python3-configobj   <none>
ii  python3-jinja2      2.10-1
pn  python3-jsonpatch   <none>
pn  python3-jsonschema  <none>
pn  python3-oauthlib    <none>
ii  python3-requests    2.21.0-1
ii  python3-six         1.12.0-1
ii  python3-yaml        3.13-2
ii  util-linux          2.33.1-0.1

Versions of packages cloud-init recommends:
ii  eatmydata  105-7
ii  sudo       1.8.27-1

Versions of packages cloud-init suggests:
ii  btrfs-progs  4.20.2-1
ii  e2fsprogs    1.45.0-1
ii  xfsprogs     4.20.0-1

/var/log/cloud-init.log
/var/log/cloud-init-output.log
{
	weekly
	rotate 4
	compress
	delaycompress
	missingok
	notifempty
}