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Minor doc updates and bootstrap cleanups #507

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May 20, 2024
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Minor doc updates and bootstrap cleanups #507

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c2d66c9
docs: Leave a note about fail2ban reading from the journal and not sy…
rspier May 5, 2024
aa0fc9c
docs: make notes about aditional node-exporter modules we probably wa…
rspier May 5, 2024
0a4ec44
bootstrap: sort @required_debs
rspier May 5, 2024
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4 changes: 2 additions & 2 deletions bootstrap/selfconfig-root
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Original file line number Diff line number Diff line change
Expand Up @@ -68,13 +68,13 @@ my @required_debs = qw(
libexpat1-dev
libgetopt-long-descriptive-perl
libpath-tiny-perl
libsasl2-modules
libssl-dev
nginx
python3-certbot-nginx
ufw
unzip
zlib1g-dev
libsasl2-modules
ufw
);

run_cmd(qw(apt-get -o DPkg::Lock::Timeout=60 install -y), @required_debs);
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27 changes: 27 additions & 0 deletions doc/install-prod.md
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Expand Up @@ -66,6 +66,17 @@ Install node exporter.
apt -y install prometheus-node-exporter
```

### General

You probably want to enable some non-default collectors. In
`/etc/default/prometheus-node-exporter`:

```
ARGS="--collector.systemd"
```

### nginx

Consider
[nginx-prometheus-exporter](https://github.com/nginxinc/nginx-prometheus-exporter).

Expand Down Expand Up @@ -95,13 +106,29 @@ server {

## Additional Configuration

### Fail2ban

Default fail2ban bantime is very short. Make it longer:

```
fail2ban-client start sshd
fail2ban-client set sshd bantime 86400
```

Make sure that fail2ban is reading logs. Run `fail2ban-client status
sshd`. If it's not failing any IPs, that's a sign it's not working.
The default backend of `auto` normally works, but may get confused if
`/var/log/auth.log` exists. If deleting `/var/log/auth.log` doesn't
work, or you want to force it to always read the journal... in
`/etc/fail2ban/jail.conf`:

```
[DEFAULT]
backend = systemd
```

### Package upgrades

Automatic security upgrades are a good idea, and probably outweigh
the risks.

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