Merge pull request #1963 from shin-/1923-catch-timeout

Exit gracefully when requests encounter a ReadTimeout exception.

compose/cli/main.py

@@ -10,11 +10,13 @@ from operator import attrgetter
 
 import dockerpty
 from docker.errors import APIError
+from requests.exceptions import ReadTimeout
 
 from .. import __version__
 from .. import legacy
 from ..config import parse_environment
 from ..const import DEFAULT_TIMEOUT
+from ..const import HTTP_TIMEOUT
 from ..progress_stream import StreamOutputError
 from ..project import ConfigurationError
 from ..project import NoSuchService
@@ -66,6 +68,12 @@ def main():
     except NeedsBuildError as e:
         log.error("Service '%s' needs to be built, but --no-build was passed." % e.service.name)
         sys.exit(1)
+    except ReadTimeout as e:
+        log.error(
+            "An HTTP request took too long to complete. Retry with --verbose to obtain debug information.\n"
+            "If you encounter this issue regularly because of slow network conditions, consider setting "
+            "COMPOSE_HTTP_TIMEOUT to a higher value (current value: %s)." % HTTP_TIMEOUT
+        )
 
 
 def setup_logging():