Werk #18158: cmk-migrate-http: Handle virtual host without host correctly
| Component | Site management | ||||
| Title | cmk-migrate-http: Handle virtual host without host correctly | ||||
| Date | Oct 9, 2025 | ||||
| Level | Trivial Change | ||||
| Class | Bug Fix | ||||
| Compatibility | Compatible - no manual interaction needed | ||||
| Checkmk versions & editions |
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The script cmk-migrate-http can be used to migrate check_http rules to check_httpv2 rules in an automated fashion.
The old plug-in check_http supported HTTP/1.0, which is no longer supported by the new plug-in.
Because of this, cmk-migrate-http uses the Virtual host field to obtain a host name to construct a url.
However, this did not take into account that in some configurations the Virtual host field may contain invalid values (with respect to RFC7230).
For example, the value /web would result in the url http:///web.
With this Werk, the invalid Virtual host field will be ignored.
The migration will fallback to the Address field.
The Virtual host field is still used for the Host header.
In effect, this means that check_httpv2 will send the same request as check_http did.
Note, that a RFC7230 compliant server should reject these types of requests with a 404.