Merge pull request #9237 from mheon/backports_300_RC3

Backports for v3.0,0-RC3

cmd/podman/common/completion.go

@@ -817,6 +817,7 @@ func AutocompleteNetworkFlag(cmd *cobra.Command, args []string, toComplete strin
 				"allow_host_loopback=": getBoolCompletion,
 				"cidr=":                nil,
 				"enable_ipv6=":         getBoolCompletion,
+				"mtu=":                 nil,
 				"outbound_addr=":       nil,
 				"outbound_addr6=":      nil,
 				"port_handler=": func(_ string) ([]string, cobra.ShellCompDirective) {

cmd/podman/common/volumes.go

@@ -353,6 +353,10 @@ func getBindMount(args []string) (spec.Mount, error) {
 			default:
 				return newMount, errors.Wrapf(util.ErrBadMntOption, "%s mount option must be 'private' or 'shared'", kv[0])
 			}
+		case "consistency":
+			// Often used on MACs and mistakenly on Linux platforms.
+			// Since Docker ignores this option so shall we.
+			continue
 		default:
 			return newMount, errors.Wrapf(util.ErrBadMntOption, kv[0])
 		}
@@ -437,6 +441,10 @@ func getTmpfsMount(args []string) (spec.Mount, error) {
 			}
 			newMount.Destination = filepath.Clean(kv[1])
 			setDest = true
+		case "consistency":
+			// Often used on MACs and mistakenly on Linux platforms.
+			// Since Docker ignores this option so shall we.
+			continue
 		default:
 			return newMount, errors.Wrapf(util.ErrBadMntOption, kv[0])
 		}
@@ -534,6 +542,10 @@ func getNamedVolume(args []string) (*specgen.NamedVolume, error) {
 			}
 			newVolume.Dest = filepath.Clean(kv[1])
 			setDest = true
+		case "consistency":
+			// Often used on MACs and mistakenly on Linux platforms.
+			// Since Docker ignores this option so shall we.
+			continue
 		default:
 			return nil, errors.Wrapf(util.ErrBadMntOption, kv[0])
 		}
@@ -581,6 +593,10 @@ func getImageVolume(args []string) (*specgen.ImageVolume, error) {
 			default:
 				return nil, errors.Wrapf(util.ErrBadMntOption, "invalid rw value %q", kv[1])
 			}
+		case "consistency":
+			// Often used on MACs and mistakenly on Linux platforms.
+			// Since Docker ignores this option so shall we.
+			continue
 		default:
 			return nil, errors.Wrapf(util.ErrBadMntOption, kv[0])
 		}

cmd/podman/pods/create.go

@@ -171,33 +171,6 @@ func create(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	createOptions.Net.Network = specgen.Namespace{}
-	if cmd.Flag("network").Changed {
-		netInput, err := cmd.Flags().GetString("network")
-		if err != nil {
-			return err
-		}
-		parts := strings.SplitN(netInput, ":", 2)
-
-		n := specgen.Namespace{}
-		switch {
-		case netInput == "bridge":
-			n.NSMode = specgen.Bridge
-		case netInput == "host":
-			n.NSMode = specgen.Host
-		case netInput == "slirp4netns", strings.HasPrefix(netInput, "slirp4netns:"):
-			n.NSMode = specgen.Slirp
-			if len(parts) > 1 {
-				createOptions.Net.NetworkOptions = make(map[string][]string)
-				createOptions.Net.NetworkOptions[parts[0]] = strings.Split(parts[1], ",")
-			}
-		default:
-			// Container and NS mode are presently unsupported
-			n.NSMode = specgen.Bridge
-			createOptions.Net.CNINetworks = strings.Split(netInput, ",")
-		}
-		createOptions.Net.Network = n
-	}
 	if len(createOptions.Net.PublishPorts) > 0 {
 		if !createOptions.Infra {
 			return errors.Errorf("you must have an infra container to publish port bindings to the host")

docs/source/markdown/podman-create.1.md

@@ -635,6 +635,7 @@ Valid _mode_ values are:
 - **private**: create a new namespace for the container (default)
 - **slirp4netns[:OPTIONS,...]**: use **slirp4netns**(1) to create a user network stack. This is the default for rootless containers. It is possible to specify these additional options:
   - **allow_host_loopback=true|false**: Allow the slirp4netns to reach the host loopback IP (`10.0.2.2`). Default is false.
+  - **mtu=MTU**: Specify the MTU to use for this network. (Default is `65520`).
   - **cidr=CIDR**: Specify ip range to use for this network. (Default is `10.0.2.0/24`).
   - **enable_ipv6=true|false**: Enable IPv6. Default is false. (Required for `outbound_addr6`).
   - **outbound_addr=INTERFACE**: Specify the outbound interface slirp should bind to (ipv4 traffic only).

docs/source/markdown/podman-run.1.md

@@ -671,6 +671,7 @@ Valid _mode_ values are:
 - **private**: create a new namespace for the container (default)
 - **slirp4netns[:OPTIONS,...]**: use **slirp4netns**(1) to create a user network stack. This is the default for rootless containers. It is possible to specify these additional options:
   - **allow_host_loopback=true|false**: Allow the slirp4netns to reach the host loopback IP (`10.0.2.2`). Default is false.
+  - **mtu=MTU**: Specify the MTU to use for this network. (Default is `65520`).
   - **cidr=CIDR**: Specify ip range to use for this network. (Default is `10.0.2.0/24`).
   - **enable_ipv6=true|false**: Enable IPv6. Default is false. (Required for `outbound_addr6`).
   - **outbound_addr=INTERFACE**: Specify the outbound interface slirp should bind to (ipv4 traffic only).

libpod/container.go

@@ -1073,6 +1073,18 @@ func networkDisabled(c *Container) (bool, error) {
 	return false, nil
 }
 
+func (c *Container) HostNetwork() bool {
+	if c.config.CreateNetNS || c.config.NetNsCtr != "" {
+		return false
+	}
+	for _, ns := range c.config.Spec.Linux.Namespaces {
+		if ns.Type == spec.NetworkNamespace {
+			return false
+		}
+	}
+	return true
+}
+
 // ContainerState returns containerstate struct
 func (c *Container) ContainerState() (*ContainerState, error) {
 	if !c.batched {

libpod/container_internal_linux.go

@@ -213,6 +213,7 @@ func (c *Container) resolveWorkDir() error {
 			// we need to return the full error.
 			return errors.Wrapf(err, "error detecting workdir %q on container %s", workdir, c.ID())
 		}
+		return nil
 	}
 
 	// Ensure container entrypoint is created (if required).

libpod/kube.go

@@ -49,6 +49,7 @@ func (p *Pod) GenerateForKube() (*v1.Pod, []v1.ServicePort, error) {
 	}
 
 	extraHost := make([]v1.HostAlias, 0)
+	hostNetwork := false
 	if p.HasInfraContainer() {
 		infraContainer, err := p.getInfraContainer()
 		if err != nil {
@@ -69,9 +70,9 @@ func (p *Pod) GenerateForKube() (*v1.Pod, []v1.ServicePort, error) {
 			return nil, servicePorts, err
 		}
 		servicePorts = containerPortsToServicePorts(ports)
-
+		hostNetwork = p.config.InfraContainer.HostNetwork
 	}
-	pod, err := p.podWithContainers(allContainers, ports)
+	pod, err := p.podWithContainers(allContainers, ports, hostNetwork)
 	if err != nil {
 		return nil, servicePorts, err
 	}
@@ -167,13 +168,14 @@ func containersToServicePorts(containers []v1.Container) []v1.ServicePort {
 	return sps
 }
 
-func (p *Pod) podWithContainers(containers []*Container, ports []v1.ContainerPort) (*v1.Pod, error) {
+func (p *Pod) podWithContainers(containers []*Container, ports []v1.ContainerPort, hostNetwork bool) (*v1.Pod, error) {
 	deDupPodVolumes := make(map[string]*v1.Volume)
 	first := true
 	podContainers := make([]v1.Container, 0, len(containers))
+	dnsInfo := v1.PodDNSConfig{}
 	for _, ctr := range containers {
 		if !ctr.IsInfra() {
-			ctr, volumes, err := containerToV1Container(ctr)
+			ctr, volumes, _, err := containerToV1Container(ctr)
 			if err != nil {
 				return nil, err
 			}
@@ -196,17 +198,33 @@ func (p *Pod) podWithContainers(containers []*Container, ports []v1.ContainerPor
 				vol := vol
 				deDupPodVolumes[vol.Name] = &vol
 			}
+		} else {
+			_, _, infraDNS, err := containerToV1Container(ctr)
+			if err != nil {
+				return nil, err
+			}
+			if infraDNS != nil {
+				if servers := infraDNS.Nameservers; len(servers) > 0 {
+					dnsInfo.Nameservers = servers
+				}
+				if searches := infraDNS.Searches; len(searches) > 0 {
+					dnsInfo.Searches = searches
+				}
+				if options := infraDNS.Options; len(options) > 0 {
+					dnsInfo.Options = options
+				}
+			}
 		}
 	}
 	podVolumes := make([]v1.Volume, 0, len(deDupPodVolumes))
 	for _, vol := range deDupPodVolumes {
 		podVolumes = append(podVolumes, *vol)
 	}
 
-	return addContainersAndVolumesToPodObject(podContainers, podVolumes, p.Name()), nil
+	return addContainersAndVolumesToPodObject(podContainers, podVolumes, p.Name(), &dnsInfo, hostNetwork), nil
 }
 
-func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.Volume, podName string) *v1.Pod {
+func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.Volume, podName string, dnsOptions *v1.PodDNSConfig, hostNetwork bool) *v1.Pod {
 	tm := v12.TypeMeta{
 		Kind:       "Pod",
 		APIVersion: "v1",
@@ -225,8 +243,12 @@ func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.
 		CreationTimestamp: v12.Now(),
 	}
 	ps := v1.PodSpec{
-		Containers: containers,
-		Volumes:    volumes,
+		Containers:  containers,
+		Volumes:     volumes,
+		HostNetwork: hostNetwork,
+	}
+	if dnsOptions != nil {
+		ps.DNSConfig = dnsOptions
 	}
 	p := v1.Pod{
 		TypeMeta:   tm,
@@ -241,75 +263,111 @@ func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.
 func simplePodWithV1Containers(ctrs []*Container) (*v1.Pod, error) {
 	kubeCtrs := make([]v1.Container, 0, len(ctrs))
 	kubeVolumes := make([]v1.Volume, 0)
+	hostNetwork := true
+	podDNS := v1.PodDNSConfig{}
 	for _, ctr := range ctrs {
-		kubeCtr, kubeVols, err := containerToV1Container(ctr)
+		if !ctr.HostNetwork() {
+			hostNetwork = false
+		}
+		kubeCtr, kubeVols, ctrDNS, err := containerToV1Container(ctr)
 		if err != nil {
 			return nil, err
 		}
 		kubeCtrs = append(kubeCtrs, kubeCtr)
 		kubeVolumes = append(kubeVolumes, kubeVols...)
-	}
-	return addContainersAndVolumesToPodObject(kubeCtrs, kubeVolumes, strings.ReplaceAll(ctrs[0].Name(), "_", "")), nil
 
+		// Combine DNS information in sum'd structure
+		if ctrDNS != nil {
+			// nameservers
+			if servers := ctrDNS.Nameservers; servers != nil {
+				if podDNS.Nameservers == nil {
+					podDNS.Nameservers = make([]string, 0)
+				}
+				for _, s := range servers {
+					if !util.StringInSlice(s, podDNS.Nameservers) { // only append if it does not exist
+						podDNS.Nameservers = append(podDNS.Nameservers, s)
+					}
+				}
+			}
+			// search domains
+			if domains := ctrDNS.Searches; domains != nil {
+				if podDNS.Searches == nil {
+					podDNS.Searches = make([]string, 0)
+				}
+				for _, d := range domains {
+					if !util.StringInSlice(d, podDNS.Searches) { // only append if it does not exist
+						podDNS.Searches = append(podDNS.Searches, d)
+					}
+				}
+			}
+			// dns options
+			if options := ctrDNS.Options; options != nil {
+				if podDNS.Options == nil {
+					podDNS.Options = make([]v1.PodDNSConfigOption, 0)
+				}
+				podDNS.Options = append(podDNS.Options, options...)
+			}
+		} // end if ctrDNS
+	}
+	return addContainersAndVolumesToPodObject(kubeCtrs, kubeVolumes, strings.ReplaceAll(ctrs[0].Name(), "_", ""), &podDNS, hostNetwork), nil
 }
 
 // containerToV1Container converts information we know about a libpod container
 // to a V1.Container specification.
-func containerToV1Container(c *Container) (v1.Container, []v1.Volume, error) {
+func containerToV1Container(c *Container) (v1.Container, []v1.Volume, *v1.PodDNSConfig, error) {
 	kubeContainer := v1.Container{}
 	kubeVolumes := []v1.Volume{}
 	kubeSec, err := generateKubeSecurityContext(c)
 	if err != nil {
-		return kubeContainer, kubeVolumes, err
+		return kubeContainer, kubeVolumes, nil, err
 	}
 
 	if len(c.config.Spec.Linux.Devices) > 0 {
 		// TODO Enable when we can support devices and their names
 		kubeContainer.VolumeDevices = generateKubeVolumeDeviceFromLinuxDevice(c.Spec().Linux.Devices)
-		return kubeContainer, kubeVolumes, errors.Wrapf(define.ErrNotImplemented, "linux devices")
+		return kubeContainer, kubeVolumes, nil, errors.Wrapf(define.ErrNotImplemented, "linux devices")
 	}
 
 	if len(c.config.UserVolumes) > 0 {
 		// TODO When we until we can resolve what the volume name should be, this is disabled
 		// Volume names need to be coordinated "globally" in the kube files.
 		volumeMounts, volumes, err := libpodMountsToKubeVolumeMounts(c)
 		if err != nil {
-			return kubeContainer, kubeVolumes, err
+			return kubeContainer, kubeVolumes, nil, err
 		}
 		kubeContainer.VolumeMounts = volumeMounts
 		kubeVolumes = append(kubeVolumes, volumes...)
 	}
 
 	envVariables, err := libpodEnvVarsToKubeEnvVars(c.config.Spec.Process.Env)
 	if err != nil {
-		return kubeContainer, kubeVolumes, err
+		return kubeContainer, kubeVolumes, nil, err
 	}
 
 	portmappings, err := c.PortMappings()
 	if err != nil {
-		return kubeContainer, kubeVolumes, err
+		return kubeContainer, kubeVolumes, nil, err
 	}
 	ports, err := ocicniPortMappingToContainerPort(portmappings)
 	if err != nil {
-		return kubeContainer, kubeVolumes, err
+		return kubeContainer, kubeVolumes, nil, err
 	}
 
-	containerCommands := c.Command()
-	kubeContainer.Name = removeUnderscores(c.Name())
+	// Handle command and arguments.
+	if ep := c.Entrypoint(); len(ep) > 0 {
+		// If we have an entrypoint, set the container's command as
+		// arguments.
+		kubeContainer.Command = ep
+		kubeContainer.Args = c.Command()
+	} else {
+		kubeContainer.Command = c.Command()
+	}
 
+	kubeContainer.Name = removeUnderscores(c.Name())
 	_, image := c.Image()
 	kubeContainer.Image = image
 	kubeContainer.Stdin = c.Stdin()
 
-	// prepend the entrypoint of the container to command
-	if ep := c.Entrypoint(); len(c.Entrypoint()) > 0 {
-		ep = append(ep, containerCommands...)
-		containerCommands = ep
-	}
-	kubeContainer.Command = containerCommands
-	// TODO need to figure out how we handle command vs entry point.  Kube appears to prefer entrypoint.
-	// right now we just take the container's command
-	//container.Args = args
 	kubeContainer.WorkingDir = c.WorkingDir()
 	kubeContainer.Ports = ports
 	// This should not be applicable
@@ -355,7 +413,38 @@ func containerToV1Container(c *Container) (v1.Container, []v1.Volume, error) {
 		}
 	}
 
-	return kubeContainer, kubeVolumes, nil
+	// Obtain the DNS entries from the container
+	dns := v1.PodDNSConfig{}
+
+	// DNS servers
+	if servers := c.config.DNSServer; len(servers) > 0 {
+		dnsServers := make([]string, 0)
+		for _, server := range servers {
+			dnsServers = append(dnsServers, server.String())
+		}
+		dns.Nameservers = dnsServers
+	}
+
+	// DNS search domains
+	if searches := c.config.DNSSearch; len(searches) > 0 {
+		dns.Searches = searches
+	}
+
+	// DNS options
+	if options := c.config.DNSOption; len(options) > 0 {
+		dnsOptions := make([]v1.PodDNSConfigOption, 0)
+		for _, option := range options {
+			// the option can be "k:v" or just "k", no delimiter is required
+			opts := strings.SplitN(option, ":", 2)
+			dnsOpt := v1.PodDNSConfigOption{
+				Name:  opts[0],
+				Value: &opts[1],
+			}
+			dnsOptions = append(dnsOptions, dnsOpt)
+		}
+		dns.Options = dnsOptions
+	}
+	return kubeContainer, kubeVolumes, &dns, nil
 }
 
 // ocicniPortMappingToContainerPort takes an ocicni portmapping and converts