Bug #22402
Updated by Alexis Mousset about 1 year ago
h2. Problem Server 7.2, Relay 6.2, Agent 6.2 (so 7.2 policies everywhere) Agents can send their inventory, but the inventory is stopped on the relay, with relayd logging: <pre> ERROR relayd::processing::inventory: output error: HTTP error: https://server/inventories/mynode-myid.ocs.gz: error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1916: (self signed certificate) INFO relayd::processing::inventory: transient error, skipping </pre> This can be easily reproduced with latest patch versions on CentOS8. h2. Cause @relayd@’s configuration contains: <pre> [general] # Use cert pinning peer_authentication = "cert_pinning" </pre> But the 6.2 @relayd@ does not understand this parameter. parameter It also does not have this parameter line (which is part of in the 6.2 policies) : <pre> [upstream.output] verify_certificates = false # or true in case the certificate verification option is enabled. </pre> Which means the default value is used, which is @true@. That means that the 6.2 @relayd@ relayd considers we are in a “normal” CA-based ca-based certificate setup, with verification enabled. It enabled, and hence requires require a valid certificate for the system CA, certificate, which cannot happen on a 7.2 server (as we enforce usage of the Rudder certificate). h2. Solution We need to allow the 6.2 relayd to skip certificate verification, while not disabling it on 7.2 relays. We can use CFEngine version conditions to set the right value on 6.2 relays: <pre> "rudder_relayd_disable_cert_pinning" expression => "cfengine_3_15", scope => "namespace"; </pre> In the relayd system technique.