zulip/puppet/zulip_ops/files/cron.d
Alex Vandiver b982222e03 camo: Replace with go-camo implementation.
The upstream of the `camo` repository[1] has been unmaintained for
several years, and is now archived by the owner.  Additionally, it has
a number of limitations:
 - It is installed as a sysinit service, which does not run under
   Docker
 - It does not prevent access to internal IPs, like 127.0.0.1
 - It does not respect standard `HTTP_proxy` environment variables,
   making it unable to use Smokescreen to prevent the prior flaw
 - It occasionally just crashes, and thus must have a cron job to
   restart it.

Swap camo out for the drop-in replacement go-camo[2], which has the
same external API, requiring not changes to Django code, but is more
maintained.  Additionally, it resolves all of the above complaints.

go-camo is not configured to use Smokescreen as a proxy, because its
own private-IP filtering prevents using a proxy which lies within that
IP space.  It is also unclear if the addition of Smokescreen would
provide any additional protection over the existing IP address
restrictions in go-camo.

go-camo has a subset of the security headers that our nginx reverse
proxy sets, and which camo set; provide the missing headers with `-H`
to ensure that go-camo, if exposed from behind some other non-nginx
load-balancer, still provides the necessary security headers.

Fixes #18351 by moving to supervisor.
Fixes zulip/docker-zulip#298 also by moving to supervisor.

[1] https://github.com/atmos/camo
[2] https://github.com/cactus/go-camo
2021-11-19 15:58:26 -08:00
..
check_send_receive_time dependencies: Remove WebSockets system for sending messages. 2020-01-14 22:34:00 -08:00
fetch-contributor-data team: Generate team page data using cron job. 2020-04-08 12:52:31 -07:00
test_zephyr_personal_mirrors
zephyr-mirror