"Surprise, surprise, surprise!" (Do you know which classic TV character that quote is from?) We've made a lot of progress on new features since v2.3, and all the major work slated for v2.4 is already done! This is a preview release.
This is a preview release. There's still some fine-tuning we need to do which is delaying the release candidates, but I wanted to roll out some of the exciting improvements early so you can start testing them. As far as I can tell, this tag is relatively stable. However, please expect bugs; though I bet most of them will be minor or limited to edge cases.
Documentation will be updated in the coming weeks. Until then, please refer to individual commits/issues (below) and the code base directly (it is easy to search and read) for docs. We're happy to help on our forums too.
For highlights, see release notes for v2.4.0 stable.
Many other things have been added, changed, or improved as well. See all the commits for details.
Please give this a try in low-risk environments as soon as you can, and we'll be able to ship a better v2.4 stable!
Changelog
bf50d70 acmeserver: Support custom CAs from Caddyfile
ab80ff4 admin: Identity management, remote admin, config loaders (#3994)
3366384 caddycmd: Add upgrade command (#3972)
c8557dc caddyfile: Introduce basic linting and fmt check (#3923)
f021696 caddyfile: Refactor unmarshaling of module tokens
8ec90f1 caddyhttp: Check for invalid subdirectives of static_response
bef80cd caddyhttp: Fix redir html status code, improve flow (#3987)
e2c5c28 caddyhttp: Implement handler abort; new 'abort' directive (close #3871) (#3983)
cc63c58 caddyhttp: Support placeholders in header matcher values (close #3916)
160d199 caddytest: Update Caddyfile tests for formatting, HTTP-only blocks
09432ba caddytls: Configurable OCSP stapling; global option (closes #3714)
51e3fdb caddytls: Save email with account if not already specified
8b6fdc0 caddytls: add 'key_type' subdirective (#3956)
2772ede cmd: Add --force flag to reload command (close #4005)
ed67823 cmd: Clean up build-info and upgrade output
59071ea cmd: Implement sd_notify() to notify systemd about readiness (#3963)
144b65c cmd: Organize list-modules output; --packages flag (#3925)
8f6f986 cmd: Print more detailed version with --environ
b1bec8c go.mod: Update CertMagic and acmez (improved IDN support)
8c29129 httpcaddyfile: Add resolvers subdir of tls (close #4008)
7846bc1 httpcaddyfile: Adjust iterator when removing AP (fix #3953)
653a0d3 httpcaddyfile: Fix automation policies
90284e8 httpcaddyfile: Fix default issuers when email provided
d68cff8 httpcaddyfile: Skip TLS APs for HTTP-only hosts (fix #3977)
55e49ff httpcaddyfile: Sort catch-all site blocks properly (fix #4003)
c2b91db httpcaddyfile: Support repeated use of cert_issuer global option
c986110 httpcaddyfile: Warn if site address uses unspecified IP (close #4004)
ef54483 logging: Remove logfmt encoder (close #3575)
58e83a8 map: Add missing json struct tag
3c9256a reverseproxy: Caddyfile health check headers, host header support (#3948)
5ef76ff reverseproxy: Response buffering & configurable buffer size
88a38bd rewrite: Use RawPath instead of Path (fix #3596) (#3918)
14f50d9 templates: Add fileExists and httpError template actions