support advanced network configuration via cli

Rework the --network parse logic to support multiple networks with
specific network configuration settings.
--network can now be set multiple times. For bridge network mode the
following options have been added:
  - **alias=name**: Add network-scoped alias for the container.
  - **ip=IPv4**: Specify a static ipv4 address for this container.
  - **ip=IPv6**: Specify a static ipv6 address for this container.
  - **mac=MAC**: Specify a static mac address address for this container.
  - **interface_name**: Specify a name for the created network interface inside the container.

So now you can set --network bridge:ip=10.88.0.10,mac=44:33:22:11:00:99
for the default bridge network as well as for network names.
This is better than using --ip because we can set the ip per network
without any confusion which network the ip address should be assigned
to.
The --ip, --mac-address and --network-alias options are still supported
but --ip or --mac-address can only be set when only one network is set.
This limitation already existed previously.

The ability to specify a custom network interface name is new
Fixes #11534

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

1 files changed, 1 insertions, 8 deletions

diff --git a/cmd/podman/common/create_opts.go b/cmd/podman/common/create_opts.go
index 8f0cd1be6..990c1c063 100644
--- a/cmd/podman/common/create_opts.go
+++ b/cmd/podman/common/create_opts.go
@@ -156,18 +156,11 @@ func ContainerCreateToContainerCLIOpts(cc handlers.CreateContainerConfig, rtc *c
 	}
 
 	// netMode
-	nsmode, networks, err := specgen.ParseNetworkNamespace(string(cc.HostConfig.NetworkMode), true)
+	nsmode, networks, netOpts, err := specgen.ParseNetworkFlag([]string{string(cc.HostConfig.NetworkMode)})
 	if err != nil {
 		return nil, nil, err
 	}
 
-	var netOpts map[string][]string
-	parts := strings.SplitN(string(cc.HostConfig.NetworkMode), ":", 2)
-	if len(parts) > 1 {
-		netOpts = make(map[string][]string)
-		netOpts[parts[0]] = strings.Split(parts[1], ",")
-	}
-
 	// network
 	// Note: we cannot emulate compat exactly here. we only allow specifics of networks to be
 	// defined when there is only one network.