Hi,

Just guessing - it's Lets Encrypt certs?
Or may be something InternalCA when certificate issues by golang application?


k
Sent from my iPhone

> On 24 Apr 2026, at 15:54, Flemming Frandsen via ceph-users 
> <[email protected]> wrote:
> 
> I have a tentacle 20.2.1 cluster managed by cephadm, where I have
> configured a certificate for the rgw using something like:
> 
> service_type: ingress
> service_id: rgw.default
> service_name: ingress.rgw.default
> placement:
> count: 3
> label: rgw
> spec:
> backend_service: rgw.default
> first_virtual_router_id: 50
> frontend_port: 443
> monitor_port: 8080
> virtual_ip: 10.0.40.3/24
> networks:
>   - 10.0.40.0/24
> ssl_cert: |
>   -----BEGIN CERTIFICATE-----
>   *snip*
>   -----END CERTIFICATE-----
>   -----BEGIN CERTIFICATE-----
>   *snip*
>   -----END CERTIFICATE-----
>   -----BEGIN RSA PRIVATE KEY-----
>   *snip*
>   -----END RSA PRIVATE KEY-----
> 
> This initially worked perfectly, but I have just rotated the certificate by
> generating the yaml with a fresh private key and associated certificate
> then installing it with:
>  ceph orch apply -i new.yaml
> 
> Clients accessing the rgw ingress get the correct certificate and work
> perfectly, both before and after the key rotation.
> 
> 
> I have a script that does this for me daily, and until the certificate was
> rotated, everything was fine, but then I got this error:
> 
> # ceph orch certmgr cert check
> 
> Certificate 'ingress_ssl_cert (ingress.rgw.default)' (user-made) is not
> valid (error: Invalid cert/key pair: [('x509 certificate routines', '',
> 'key values mismatch')])
> 
> After messing with the certificate a bunch I now get a completely
> different, but also worrying error:
> 
> # ceph orch certmgr cert check
> - Certificate 'ingress_ssl_cert (ingress.rgw.default)' (user-made) is not
> valid (error: Invalid private key: [('DECODER routines', '',
> 'unsupported')])
> 
> The documentation offers no help:
> https://docs.ceph.com/en/tentacle/cephadm/certmgr/
> 
> The error seems to come from this code:
> https://github.com/ceph/ceph/blob/main/src/python-common/ceph/cryptotools/internal.py#L134
> 
> So the error is an amputated exception from somewhere in openssl but the
> actual exception is eaten by the code, so there is no way for me to debug
> the situation:
> https://github.com/ceph/ceph/blob/main/src/python-common/ceph/cryptotools/internal.py#L134
> 
> I have tried installing the old certificate and key, that only leads the
> the Invalid private key: [('DECODER routines', '', 'unsupported')] error.
> 
> I have tried re-formatting the pkcs#1 RSA key as PKCS#8, but that does
> nothing.
> 
> I have even tried copying the key and cert pem files into the mgr container
> and verified them using the openssl installed in the container.
> 
> The certificates are generated by cert-manager, running in k8s and a
> cronjob that periodically pushes the new key/cert to the ceph cluster via
> ssh.
> 
> Has anyone seen these types of errors before?
> 
> --
> Flemming Frandsen - YAPH - http://osaa.dk - http://dren.dk/
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