@@ -20,6 +20,7 @@ import hashlib
import atexit
import uuid
import argparse
+import enum
import tempfile
import re
import signal
@@ -38,6 +39,26 @@ FILTERED_ENV_NAMES = ['ftp_proxy', 'http_proxy', 'https_proxy']
DEVNULL = open(os.devnull, 'wb')
+class EngineEnum(enum.IntEnum):
+ AUTO = 1
+ DOCKER = 2
+ PODMAN = 3
+
+ def __str__(self):
+ return self.name.lower()
+
+ def __repr__(self):
+ return str(self)
+
+ @staticmethod
+ def argparse(s):
+ try:
+ return EngineEnum[s.upper()]
+ except KeyError:
+ return s
+
+
+USE_ENGINE = EngineEnum.AUTO
def _text_checksum(text):
"""Calculate a digest string unique to the text content"""
@@ -48,9 +69,14 @@ def _file_checksum(filename):
return _text_checksum(open(filename, 'rb').read())
-def _guess_docker_command():
- """ Guess a working docker command or raise exception if not found"""
- commands = [["docker"], ["sudo", "-n", "docker"]]
+def _guess_engine_command():
+ """ Guess a working engine command or raise exception if not found"""
+ commands = []
+
+ if USE_ENGINE in [EngineEnum.AUTO, EngineEnum.PODMAN]:
+ commands += [["podman"]]
+ if USE_ENGINE in [EngineEnum.AUTO, EngineEnum.DOCKER]:
+ commands += [["docker"], ["sudo", "-n", "docker"]]
for cmd in commands:
try:
# docker version will return the client details in stdout
@@ -61,7 +87,7 @@ def _guess_docker_command():
except OSError:
pass
commands_txt = "\n".join([" " + " ".join(x) for x in commands])
- raise Exception("Cannot find working docker command. Tried:\n%s" %
+ raise Exception("Cannot find working engine command. Tried:\n%s" %
commands_txt)
@@ -190,7 +216,7 @@ def _dockerfile_preprocess(df):
class Docker(object):
""" Running Docker commands """
def __init__(self):
- self._command = _guess_docker_command()
+ self._command = _guess_engine_command()
self._instances = []
atexit.register(self._kill_instances)
signal.signal(signal.SIGTERM, self._kill_instances)
@@ -502,6 +528,8 @@ class ProbeCommand(SubCommand):
print("yes")
elif docker._command[0] == "sudo":
print("sudo")
+ elif docker._command[0] == "podman":
+ print("podman")
except Exception:
print("no")
@@ -597,9 +625,13 @@ class CheckCommand(SubCommand):
def main():
+ global USE_ENGINE
+
parser = argparse.ArgumentParser(description="A Docker helper",
usage="%s <subcommand> ..." %
os.path.basename(sys.argv[0]))
+ parser.add_argument("--engine", type=EngineEnum.argparse, choices=list(EngineEnum),
+ help="specify which container engine to use")
subparsers = parser.add_subparsers(title="subcommands", help=None)
for cls in SubCommand.__subclasses__():
cmd = cls()
@@ -608,6 +640,7 @@ def main():
cmd.args(subp)
subp.set_defaults(cmdobj=cmd)
args, argv = parser.parse_known_args()
+ USE_ENGINE = args.engine
return args.cmdobj.run(args, argv)
Add a --engine option to select either docker, podman or auto. Among other advantages, podman allows to run rootless & daemonless containers, fortunately sharing compatible CLI with docker. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> --- tests/docker/docker.py | 43 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 5 deletions(-)