Hi Dmitriy, thanks for your answer! I tried inserting the options into user_variables.yml and running the installation playbooks again but glance still shows 'Unable to create trust: no such option collect_timing in group [keystone_authtoken] Use the existing user token.' and the snapshot keeps disappearing. In addition, I'm seeing the following swift error: Mar 25 11:19:56 infra1-swift-proxy-container-27169fa7 proxy-server[90]: Pipeline was modified. New pipeline is "catch_errors gatekeeper healthcheck proxy-logging cache listing_formats container_sync bulk tempurl ratelimit authtoken keystoneauth staticweb copy container-quotas account-quotas slo dlo versioned_writes proxy-logging proxy-server". Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: Starting Keystone auth_token middleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "use_stderr" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "bind_ip" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "bind_port" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "workers" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "user" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "log_name" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "auth_url" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "project_domain_id" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "user_domain_id" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "project_name" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "username" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "password" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "revocation_cache_time" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: STDERR: The option "__name__" is not known to keystonemiddleware Mar 25 11:19:57 infra1-swift-proxy-container-27169fa7 proxy-server[90]: AuthToken midd Kind regards Oliver

Oh, I have a guess what this might actually be. During snapshot upload process user token that is used for the upload might get expired. If that's the case, following changes in user_variables might help to resolve the issue:

glance_glance_api_conf_overrides: keystone_authtoken: service_token_roles_required: True service_token_roles: service