Symptom

CSRs running 17.x will not revert back in cloud HA to primary because the 5 minute cron to trigger "revert_nodes.sh" doesn't execute because its path is pointing to the old version of python: [guestshell@guestshell ~]$ crontab -l */5 * * * * bash /home/guestshell/.local/lib/python2.7/site-packages/csr_ha/client_api/revert_nodes.sh [guestshell@guestshell ~]$ ls /home/guestshell/.local/lib/ python3.6 Starting IOS-XE 17.1.1 python was upgraded from 2.7 to 3.6: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/167/b_167_programmability_cg/cli_python_module.html

Conditions

Issue happens with a fresh deployment of HAv2 or even migrating from HAv2 to HAv3. Does not happen in 16.x versions.

Workaround

Manually edit the cron to point to the correct new folder: Step 0 - Enter guestshell: Router-Hostname#guestshell Step 1 - Enter edit mode for crontab: [guestshell@guestshell ~]$ crontab -e */5 * * * * bash /home/guestshell/.local/lib/python2.7/site-packages/csr_ha/client_api/revert_nodes.sh Step 2 - Press letter 'i' to insert/modify. Navigate using arrow keys (like "vi" command for unix). Step 3 - Modify path to: \/ */5 * * * * bash /home/guestshell/.local/lib/python3.6/site-packages/csr_ha/client_api/revert_nodes.sh Step 4 - Press the escape key and type: ":wq" (without quotes, just these 3 characters) Then enter. If you made a mistake you can do ":q!" (without quotes) to exit without saving changes. Step 5 - Verify: [guestshell@guestshell ~]$ crontab -l */5 * * * * bash /home/guestshell/.local/lib/python3.6/site-packages/csr_ha/client_api/revert_nodes.sh Step 5 - Restart HA service: [guestshell@guestshell ~]$ sudo systemctl stop csr_ha [guestshell@guestshell ~]$ sudo systemctl start csr_ha

Further Problem Description