1158: Use nginx for kubernetes ingress r=kaiyou a=micw
## What type of PR?
enhancement
## What does this PR do?
Currently, kubernetes uses a complex ingress setting which is not portable across different ingress controllers. This PR simplifies the ingress and delegates everythins special to Mailu to the front container,
### Related issue(s)
- closes#1121
- closes#1117
- closes#1021
- closes#1045
## Prerequistes
- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog]
Co-authored-by: Michael Wyraz <michael@wyraz.de>
1114: Resolve HOST to ADDRESS only if ADDRESS is not already set r=mergify[bot] a=micw
## What type of PR?
bug-fix
## What does this PR do?
~Makes the rsolving from hosts to ips at startup configurable~
I rewrote the pull request after #940 was merged. Now it resolves HOSTs to ADDRESSes only of ADDRESSes are not already set. So on kubernetes we can jsut set the address and have working service discovery.
### Related issue(s)
- closes#1113
## Prerequistes
~Minor change, backward compatible~
Changelog will be added
Co-authored-by: Michael Wyraz <michael@wyraz.de>
In case of TLS_FLAVOR=[mail,cert], the user supplies their own certificates.
However, since nginx is not aware of changes to these files, it cannot
reload itself e.g. when the certs get renewed.
To solve this, let’s add a small daemon in the place of
`letsencrypt.py`, which uses a flexible file-watching framework and
reloads nginx in the case the certificates change ….
To facilitate this, the default redirect at / can be disabled, even if
the default remains at redirecting to the webmailer.
The extensions are within the host scope and are read from
$ROOT/overrides/nginx/*.conf.
- Specified seperated /health path in order to allow for healthcheck even if webmail and admin are not seletectd. This also allows healthchecking fom external services like DNS load balancers;
- Make curl not to fail on TLS because localhost is not included in the certificates.
