1. The problem I’m having:
Caddy always emits a log to http.log.error when the error directive is used. I would like to ignore specific errors like error 404 and error 403, for example. It appears that log_skip and log_name only work for access logs (i.e. http.log.access), not for error logs (i.e. http.log.error). To be clear, I still want DEBUG level logs for http.log.error (because things like bad Go templates emit DEBUG level errors), but I don’t want 404 errors.
Ideally, I’d like to add something to my error_handler like:
@noLog expression `{err.status_code} in [301, 302, 307, 308, 403, 404]`
log_skip @noLog
…but this does not work at the moment. Another option is to suppress logging when using the error directive, for example:
error 404 {
log_skip
}
2. Error messages and/or full log output:
{
"level": "debug",
"ts": "2024-10-11T18:15:00.093Z",
"logger": "http.log.error",
"msg": "",
"request": {
"remote_ip": "REDACTED",
"remote_port": "REDACTED",
"client_ip": "REDACTED",
"proto": "HTTP/2.0",
"method": "POST",
"host": "example.blakeminer.com",
"uri": "/404",
"headers": {
"User-Agent": [
"curl/7.81.0"
],
"Accept": [
"*/*"
],
"Content-Type": [
"application/json"
],
"Content-Length": [
"2"
]
},
"tls": {
"resumed": false,
"version": 772,
"cipher_suite": 4865,
"proto": "h2",
"server_name": "example.blakeminer.com"
}
},
"duration": 9.6901e-5,
"status": 404,
"err_id": "REDACTED",
"err_trace": "caddyhttp.StaticError.ServeHTTP (staticerror.go:109)"
}
3. Caddy version:
v2.8.4 h1:q3pe0wpBj1OcHFZ3n/1nl4V4bxBrYoSoab7rL9BMYNk=
4. How I installed and ran Caddy:
Installed on Ubuntu using apt package manager.
APT-Sources: https://dl.cloudsmith.io/public/caddy/stable/deb/debian any-version/main amd64 Packages
a. System environment:
Ubuntu 22.04.5 LTS
x86_64
Launched with systemd 249
d. My complete Caddy config:
{
# grace period for clients on server reload
grace_period 60s
log default {
output file /var/log/caddy/default.log {
roll_size 10MiB
roll_keep 5
roll_keep_for 30d
}
format json {
time_format iso8601
}
exclude http.log.access http.log.error
}
log error {
output file /var/log/caddy/errors.log {
roll_size 10MiB
roll_keep 2
roll_keep_for 30d
}
format json {
time_format iso8601
}
level DEBUG
include http.log.error
}
}
(hsts) {
@enabled not vars noHSTS true
# Default age is 180 days
header @enabled Strict-Transport-Security "max-age=15552000"
}
(main_site) {
import hsts
encode zstd gzip
handle_errors {
# Just respond with 404.html or error.html
root * /var/www/default
import no_cache
try_files /{host}-{http.error.status_code}.html /{http.error.status_code}.html /error.html
templates
file_server
# For redirects, just redirect
@redir {
expression `{err.status_code} in [301, 302, 307, 308]`
expression `{http.response.header.Location} != ""`
}
respond @redir ""
# For JSON or non-GET requests, respond with JSON error message
@json not {
not header_regexp Content-Type \/json$
method GET
}
route @json {
header Content-Type application/json
respond `\{"message":"{http.error.status_text}","status":{http.error.status_code}\}`
}
}
}
example.blakeminer.com {
import main_site
log_skip
error 404
}