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root@<cmkserver>:~# cmk-agent-ctl register -H <host> -s <checkmk-server> -i <site> -U <username>
ERROR [cmk_agent_ctl] Failed to discover agent receiver port from Checkmk REST API, both with http and https.
Error with http:
Failed to discover agent receiver port from http://<checkmk-server>/<site>/check_mk/api/1.0/domain-types/internal/actions/discover-receiver/invoke
error sending request for url (http://<checkmk-server>/<site>/check_mk/api/1.0/domain-types/internal/actions/discover-receiver/invoke): error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914:
Error with https:
Failed to discover agent receiver port from https://<checkmk-server>/<site>/check_mk/api/1.0/domain-types/internal/actions/discover-receiver/invoke
error sending request for url (https://<checkmk-server>/<site>/check_mk/api/1.0/domain-types/internal/actions/discover-receiver/invoke): error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: (unable to get local issuer certificate)
error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914: |
Solution #1
Register the agent with the receiver port (by default 8000, counting up similar to site Apache 5000 → 5001 ...) like so:
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root@<cmkserver>:~# cmk-agent-ctl register -H <host> -s <checkmk-server> -i <site> -U <username> -p:8000 |
Solution #2
Add the self signed certificate to the OS's cert store. Example for Ubuntu: https://ubuntu.com/server/docs/security-trust-store
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