Merge pull request #5875 from rhatdan/network

Cleanup network option parsing

cmd/podman/common/createparse.go

@@ -1,7 +1,6 @@
 package common
 
 import (
-	"github.com/containers/libpod/cmd/podman/parse"
 	"github.com/containers/libpod/pkg/util"
 	"github.com/pkg/errors"
 )
@@ -17,27 +16,7 @@ func (c *ContainerCLIOpts) validate() error {
 	if _, err := util.ValidatePullType(c.Pull); err != nil {
 		return err
 	}
-	// Verify the additional hosts are in correct format
-	for _, host := range c.Net.AddHosts {
-		if _, err := parse.ValidateExtraHost(host); err != nil {
-			return err
-		}
-	}
 
-	if dnsSearches := c.Net.DNSSearch; len(dnsSearches) > 0 {
-		// Validate domains are good
-		for _, dom := range dnsSearches {
-			if dom == "." {
-				if len(dnsSearches) > 1 {
-					return errors.Errorf("cannot pass additional search domains when also specifying '.'")
-				}
-				continue
-			}
-			if _, err := parse.ValidateDomain(dom); err != nil {
-				return err
-			}
-		}
-	}
 	var imageVolType = map[string]string{
 		"bind":   "",
 		"tmpfs":  "",

cmd/podman/common/netflags.go

@@ -3,7 +3,9 @@ package common
 import (
 	"net"
 
+	"github.com/containers/libpod/cmd/podman/parse"
 	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 )
@@ -58,20 +60,60 @@ func NetFlagsToNetOptions(cmd *cobra.Command) (*entities.NetOptions, error) {
 	if err != nil {
 		return nil, err
 	}
-	servers, err := cmd.Flags().GetStringSlice("dns")
-	if err != nil {
-		return nil, err
-	}
-	for _, d := range servers {
-		if d == "none" {
-			opts.DNSHost = true
-			break
+	// Verify the additional hosts are in correct format
+	for _, host := range opts.AddHosts {
+		if _, err := parse.ValidateExtraHost(host); err != nil {
+			return nil, err
 		}
-		opts.DNSServers = append(opts.DNSServers, net.ParseIP(d))
 	}
-	opts.DNSSearch, err = cmd.Flags().GetStringSlice("dns-search")
-	if err != nil {
-		return nil, err
+
+	if cmd.Flags().Changed("dns") {
+		servers, err := cmd.Flags().GetStringSlice("dns")
+		if err != nil {
+			return nil, err
+		}
+		for _, d := range servers {
+			if d == "none" {
+				opts.UseImageResolvConf = true
+				if len(servers) > 1 {
+					return nil, errors.Errorf("%s is not allowed to be specified with other DNS ip addresses", d)
+				}
+				break
+			}
+			dns := net.ParseIP(d)
+			if dns == nil {
+				return nil, errors.Errorf("%s is not an ip address", d)
+			}
+			opts.DNSServers = append(opts.DNSServers, dns)
+		}
+	}
+
+	if cmd.Flags().Changed("dns-opt") {
+		options, err := cmd.Flags().GetStringSlice("dns-opt")
+		if err != nil {
+			return nil, err
+		}
+		opts.DNSOptions = options
+	}
+
+	if cmd.Flags().Changed("dns-search") {
+		dnsSearches, err := cmd.Flags().GetStringSlice("dns-search")
+		if err != nil {
+			return nil, err
+		}
+		// Validate domains are good
+		for _, dom := range dnsSearches {
+			if dom == "." {
+				if len(dnsSearches) > 1 {
+					return nil, errors.Errorf("cannot pass additional search domains when also specifying '.'")
+				}
+				continue
+			}
+			if _, err := parse.ValidateDomain(dom); err != nil {
+				return nil, err
+			}
+		}
+		opts.DNSSearch = dnsSearches
 	}
 
 	m, err := cmd.Flags().GetString("mac-address")
@@ -85,6 +127,7 @@ func NetFlagsToNetOptions(cmd *cobra.Command) (*entities.NetOptions, error) {
 		}
 		opts.StaticMAC = &mac
 	}
+
 	inputPorts, err := cmd.Flags().GetStringSlice("publish")
 	if err != nil {
 		return nil, err
@@ -95,6 +138,31 @@ func NetFlagsToNetOptions(cmd *cobra.Command) (*entities.NetOptions, error) {
 			return nil, err
 		}
 	}
+
+	ip, err := cmd.Flags().GetString("ip")
+	if err != nil {
+		return nil, err
+	}
+	if ip != "" {
+		staticIP := net.ParseIP(ip)
+		if staticIP == nil {
+			return nil, errors.Errorf("%s is not an ip address", ip)
+		}
+		opts.StaticIP = &staticIP
+	}
+
 	opts.NoHosts, err = cmd.Flags().GetBool("no-hosts")
+
+	if cmd.Flags().Changed("network") {
+		network, err := cmd.Flags().GetString("network")
+		if err != nil {
+			return nil, err
+		}
+
+		return nil, errors.Errorf("network %s is not yet supported", network)
+		// TODO How do I convert a string network to a Specgen.Namespace?
+		//		opts.Network = specgen.Namespace{NSMode: network}
+	}
+
 	return &opts, err
 }

cmd/podman/common/specgen.go

@@ -292,9 +292,12 @@ func FillOutSpecGen(s *specgen.SpecGenerator, c *ContainerCLIOpts, args []string
 	}
 	s.ShmSize = &shmSize
 	s.HostAdd = c.Net.AddHosts
-	s.DNSServer = c.Net.DNSServers
+	s.UseImageResolvConf = c.Net.UseImageResolvConf
+	s.DNSServers = c.Net.DNSServers
 	s.DNSSearch = c.Net.DNSSearch
-	s.DNSOption = c.Net.DNSOptions
+	s.DNSOptions = c.Net.DNSOptions
+	s.StaticIP = c.Net.StaticIP
+	s.StaticMAC = c.Net.StaticMAC
 
 	// deferred, must be added on libpod side
 	//var ImageVolumes map[string]struct{}

pkg/domain/entities/pods.go

@@ -134,7 +134,7 @@ func (p PodCreateOptions) ToPodSpecGen(s *specgen.PodSpecGenerator) {
 	s.StaticMAC = p.Net.StaticMAC
 	s.PortMappings = p.Net.PublishPorts
 	s.CNINetworks = p.Net.CNINetworks
-	if p.Net.DNSHost {
+	if p.Net.UseImageResolvConf {
 		s.NoManageResolvConf = true
 	}
 	s.DNSServer = p.Net.DNSServers

pkg/domain/entities/types.go

@@ -32,17 +32,17 @@ type VolumeDeleteReport struct{ Report }
 // NetOptions reflect the shared network options between
 // pods and containers
 type NetOptions struct {
-	AddHosts     []string
-	CNINetworks  []string
-	DNSHost      bool
-	DNSOptions   []string
-	DNSSearch    []string
-	DNSServers   []net.IP
-	Network      specgen.Namespace
-	NoHosts      bool
-	PublishPorts []ocicni.PortMapping
-	StaticIP     *net.IP
-	StaticMAC    *net.HardwareAddr
+	AddHosts           []string
+	CNINetworks        []string
+	UseImageResolvConf bool
+	DNSOptions         []string
+	DNSSearch          []string
+	DNSServers         []net.IP
+	Network            specgen.Namespace
+	NoHosts            bool
+	PublishPorts       []ocicni.PortMapping
+	StaticIP           *net.IP
+	StaticMAC          *net.HardwareAddr
 }
 
 // All CLI inspect commands and inspect sub-commands use the same options

pkg/specgen/container_validate.go

@@ -91,13 +91,13 @@ func (s *SpecGenerator) Validate() error {
 	}
 	// useimageresolveconf conflicts with dnsserver, dnssearch, dnsoption
 	if s.UseImageResolvConf {
-		if len(s.DNSServer) > 0 {
+		if len(s.DNSServers) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSServer")
 		}
 		if len(s.DNSSearch) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSSearch")
 		}
-		if len(s.DNSOption) > 0 {
+		if len(s.DNSOptions) > 0 {
 			return exclusiveOptions("UseImageResolvConf", "DNSOption")
 		}
 	}

pkg/specgen/generate/namespaces.go

@@ -145,20 +145,19 @@ func GenerateNamespaceContainerOpts(s *specgen.SpecGenerator, rt *libpod.Runtime
 	if len(s.DNSSearch) > 0 {
 		options = append(options, libpod.WithDNSSearch(s.DNSSearch))
 	}
-	if len(s.DNSServer) > 0 {
-		// TODO I'm not sure how we are going to handle this given the input
-		if len(s.DNSServer) == 1 { //&& strings.ToLower(s.DNSServer[0].) == "none" {
-			options = append(options, libpod.WithUseImageResolvConf())
-		} else {
-			var dnsServers []string
-			for _, d := range s.DNSServer {
-				dnsServers = append(dnsServers, d.String())
-			}
-			options = append(options, libpod.WithDNS(dnsServers))
+
+	if s.UseImageResolvConf {
+		options = append(options, libpod.WithUseImageResolvConf())
+	} else {
+		var dnsServers []string
+		for _, d := range s.DNSServers {
+			dnsServers = append(dnsServers, d.String())
 		}
+		options = append(options, libpod.WithDNS(dnsServers))
 	}
-	if len(s.DNSOption) > 0 {
-		options = append(options, libpod.WithDNSOption(s.DNSOption))
+
+	if len(s.DNSOptions) > 0 {
+		options = append(options, libpod.WithDNSOption(s.DNSOptions))
 	}
 	if s.StaticIP != nil {
 		options = append(options, libpod.WithStaticIP(*s.StaticIP))

pkg/specgen/specgen.go

@@ -319,24 +319,24 @@ type ContainerNetworkConfig struct {
 	// by Podman, but instead sourced from the image.
 	// Conflicts with DNSServer, DNSSearch, DNSOption.
 	UseImageResolvConf bool `json:"use_image_resolve_conf,omitempty"`
-	// DNSServer is a set of DNS servers that will be used in the
+	// DNSServers is a set of DNS servers that will be used in the
 	// container's resolv.conf, replacing the host's DNS Servers which are
 	// used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
-	DNSServer []net.IP `json:"dns_server,omitempty"`
+	DNSServers []net.IP `json:"dns_server,omitempty"`
 	// DNSSearch is a set of DNS search domains that will be used in the
 	// container's resolv.conf, replacing the host's DNS search domains
 	// which are used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
 	DNSSearch []string `json:"dns_search,omitempty"`
-	// DNSOption is a set of DNS options that will be used in the
+	// DNSOptions is a set of DNS options that will be used in the
 	// container's resolv.conf, replacing the host's DNS options which are
 	// used by default.
 	// Conflicts with UseImageResolvConf.
 	// Optional.
-	DNSOption []string `json:"dns_option,omitempty"`
+	DNSOptions []string `json:"dns_option,omitempty"`
 	// UseImageHosts indicates that /etc/hosts should not be managed by
 	// Podman, and instead sourced from the image.
 	// Conflicts with HostAdd.