See https://github.com/openstack-charmers/zaza/issues/401 for more details.
Essentially, a deploy can fail (particularly with a big model), if a single charm fails to deploy from the charm store. This is probably a transient situation, so it would be good if it could be retried at least a couple of times to allow a deployment to complete.
e.g. log from zaza:
2020-12-23 14:35:07 [INFO] ERROR cannot deploy bundle: cannot add charm "cs:~openstack-charmers-next/cinder-426": cannot retrieve charm "cs:~openstack-charmers-next/cinder-426": cannot get archive: Get "https://api.jujucharms.com/charmstore/v5/~openstack-charmers-next/cinder-426/archive?channel=stable": net/http: TLS handshake timeout
2020-12-23 14:35:07 [ERROR] {'default_alias': 'zaza-69976805f31c'}
2020-12-23 14:35:07 [ERROR] Model default_alias (zaza-69976805f31c)
2020-12-23 14:35:07 [WARNING] unknown delta type: id
Traceback (most recent call last):
File "/tmp/tmp.nrqUT819yj/func/bin/functest-run-suite", line 8, in <module>
sys.exit(main())
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/func_test_runner.py", line 278, in main
test_directory=args.test_directory)
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/func_test_runner.py", line 213, in func_test_runner
force=force, test_directory=test_directory)
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/func_test_runner.py", line 128, in run_env_deployment
test_directory=test_directory)
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/deploy.py", line 368, in deploy
deploy_bundle(bundle, model, model_ctxt=model_ctxt, force=force)
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/deploy.py", line 345, in deploy_bundle
utils.check_output_logging(cmd)
File "/tmp/tmp.nrqUT819yj/func/lib/python3.5/site-packages/zaza/charm_lifecycle/utils.py", line 493, in check_output_logging
raise subprocess.CalledProcessError(popen.returncode, cmd)
subprocess.CalledProcessError: Command '['juju', 'deploy', '-m', 'zaza-69976805f31c', '/var/lib/jenkins/checkout/0/rabbitmq-server/tests/bundles/bionic-ussuri.yaml', '--overlay', '/tmp/tmptvo0qi10/local-charm-overlay.yaml']' returned non-zero exit status 1
ERROR: InvocationError for command /tmp/tmp.nrqUT819yj/func/bin/functest-run-suite --keep-model (exited with code 1)
