compat API: allow MacAddress on container config

docker-compose sets the mac address in the container config and not the
network endpoint config. This is ugly when you have more than one
network, in this case docker just chooses the first network.

Fixes #16411

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

pkg/api/handlers/compat/containers_create.go

@@ -287,6 +287,9 @@ func cliOpts(cc handlers.CreateContainerConfig, rtc *config.Config) (*entities.C
 		NoHosts:        rtc.Containers.NoHosts,
 	}
 
+	// sigh docker-compose sets the mac address on the container config instead on the per network endpoint config
+	containerMacAddress := cc.MacAddress
+
 	// network names
 	switch {
 	case len(cc.NetworkingConfig.EndpointsConfig) > 0:
@@ -331,6 +334,16 @@ func cliOpts(cc handlers.CreateContainerConfig, rtc *config.Config) (*entities.C
 						return nil, nil, fmt.Errorf("failed to parse the mac address %q", endpoint.MacAddress)
 					}
 					netOpts.StaticMAC = types.HardwareAddr(staticMac)
+				} else if len(containerMacAddress) > 0 {
+					// docker-compose only sets one mac address for the container on the container config
+					// If there are more than one network attached it will end up on the first one,
+					// which is not deterministic since we iterate a map. Not nice but this matches docker.
+					staticMac, err := net.ParseMAC(containerMacAddress)
+					if err != nil {
+						return nil, nil, fmt.Errorf("failed to parse the mac address %q", containerMacAddress)
+					}
+					netOpts.StaticMAC = types.HardwareAddr(staticMac)
+					containerMacAddress = ""
 				}
 			}
 

test/compose/ipam_set_ip/docker-compose.yml

@@ -2,6 +2,7 @@ version: "3.2"
 services:
   test:
     image: alpine
+    mac_address: 32:b5:b2:55:48:72
     networks:
       net1:
         ipv4_address: 10.123.0.253

test/compose/ipam_set_ip/tests.sh

@@ -5,4 +5,6 @@ if [ "$TEST_FLAVOR" = "compose_v2" ]; then
     ctr_name="ipam_set_ip-test-1"
 fi
 podman container inspect "$ctr_name" --format '{{ .NetworkSettings.Networks.ipam_set_ip_net1.IPAddress }}'
-like "$output" "10.123.0.253" "$testname : ip address is set"
+is "$output" "10.123.0.253" "$testname : ip address is set"
+podman container inspect "$ctr_name" --format '{{ .NetworkSettings.Networks.ipam_set_ip_net1.MacAddress }}'
+is "$output" "32:b5:b2:55:48:72" "$testname : mac address is set"