Management Plane Upgrade Fails with "Connection timed out" Error.

Problem:

Management Upgrade failed with below mentioned error in the airctl-logs/pf9deploy-prepare-restore.log file.

Error
    
 
2023-06-13T05:36:25.811Z info INFO:pf9deploy.server.util.shell:| fatal: [airctl-1.pf9.localnet]: UNREACHABLE! => {"changed": false, "msg": "Connection timed out.", "unreachable": true} 2023-06-13T05:36:25.811Z info INFO:pf9deploy.server.util.shell:| to retry, use: --limit @/ansible-stack/mysql-configure-only.retry 2023-06-13T05:36:25.811Z info INFO:pf9deploy.server.util.shell:|  2023-06-13T05:36:25.811Z info INFO:pf9deploy.server.util.shell:| PLAY RECAP ********************************************************************* 2023-06-13T05:36:25.811Z info INFO:pf9deploy.server.util.shell:| airctl-1.pf9.localnet      : ok=0    changed=0    unreachable=1    failed=0
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Environment:

Platform9 Edge Cloud - v5.3 and Higher
Airctl

Troubleshooting:

Try to ssh to the deployment host using FQDN and confirm if it fails with Operation not permitted error.

SSH error
    
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$ ssh airctl-1.pf9.localnetWarning: Permanently added 'airctl-1.pf9.localnet,10.10.13.133' (ECDSA) to the list of known hosts.-bash: ulimit: open files: cannot modify limit: Operation not permitted
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Resolution:

Please perform below mentioned changes on the Deployment Host.
Add below mentioned entries in file /etc/security/limits.conf

Javascript
    
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* soft     nproc          1048576* hard     nproc          1048576* soft     nofile         1048576* hard     nofile         1048576root soft     nproc          1048576root hard     nproc          1048576root soft     nofile         1048576root hard     nofile         1048576
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Add below mentioned line in /etc/pam.d/sshd file.

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session    required   pam_limits.so
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