Does proxy work on unavailable upstream? #141
Description
Hello. According to manual, the registry mirror requests if the images updated on the ustream.
We use docker very intensively in our CI, and quite often affected by issues like this:
Exception: Command ['docker-compose', '--env-file', '/ClickHouse/tests/integration/test_cleanup_dir_after_bad_zk_conn/_instances_0/.env', '--project-name', 'roottestcleanupdirafterbadzkconn', '--file', '/ClickHouse/tests/integration/test_cleanup_dir_after_bad_zk_conn/_instances_0/node1/docker-compose.yml', '--file', '/compose/docker_compose_keeper.yml', 'pull'] return non-zero code 1: Pulling zoo2 ...
Pulling zoo3 ...
Pulling zoo1 ...
Pulling node1 ...
Pulling zoo3 ... error
Pulling zoo1 ... error
Pulling zoo2 ... error
Pulling node1 ... error
ERROR: for zoo3 Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
ERROR: for zoo1 Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
ERROR: for zoo2 Get "https://registry-1.docker.io/v2/": context deadline exceeded
ERROR: for node1 Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Get "https://registry-1.docker.io/v2/": context deadline exceeded
Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
And then a huge number of jobs fail.
Do I understand correctly, that registry:2 can't be setup to serve requests with what it has w/o failing?