Env var to skip ssh provisioning on sr os nodes (#1756)

introduced env var to skip ssh provisioning on sr os nodes

docs/manual/kinds/vr-sros.md

@@ -341,6 +341,15 @@ Containerlab v0.48.0+ supports SSH key injection into the Nokia SR OS nodes. Fir
 
 Next it will filter out public keys that are not of RSA/ECDSA type. The remaining valid public keys will be configured for the admin user of the Nokia SR OS node using key IDs from 32 downwards[^2]. This will enable key-based authentication next time you connect to the node.
 
+/// details | Skipping keys injection
+If you want to disable this feature (e.g. when using classic CLI mode), you can do so by setting the `CLAB_SKIP_SROS_SSH_KEY_CONFIG=true` env variable:
+
+```bash
+CLAB_SKIP_SROS_SSH_KEY=true sudo -E clab deploy -t <topo-file>
+```
+
+///
+
 ### License
 
 Path to a valid license must be provided for all Nokia SR OS nodes with a [`license`](../nodes.md#license) directive.

docs/rn/0.48.md

@@ -68,3 +68,4 @@ Now containerlab will add group ACLs to the lab directory to allow original user
 
 * fixed `destroy -t <dir>` case where topology file referred a directory #1747
 * fixed SR OS getting stuck when partial config is used with ssh keys provisioning #1750
+* introduced `CLAB_SKIP_SROS_SSH_KEY_CONFIG` env var to skip SSH key provisioning for SR OS #1756

nodes/vr_sros/vr-sros.go

@@ -139,7 +139,13 @@ func (s *vrSROS) PostDeploy(ctx context.Context, _ *nodes.PostDeployParams) erro
 		log.Infof("%s: configuration applied", s.Cfg.LongName)
 	}
 
-	if len(s.sshPubKeys) > 0 {
+	// skip ssh key configuration if CLAB_SKIP_SROS_SSH_KEY_CONFIG env var is set
+	// which is needed for SR OS nodes running in classic CLI mode, because our key
+	// injection mechanism assumes MD-CLI mode.
+	_, skipSSHKeyCfg := os.LookupEnv("CLAB_SKIP_SROS_SSH_KEY_CONFIG")
+
+	if len(s.sshPubKeys) > 0 && !skipSSHKeyCfg {
+		log.Warn("here1")
 		err := s.configureSSHPublicKeys(ctx)
 		if err != nil {
 			return err