update container state structure

This commit replaces the now deprecated `configs.HookState` struct
with `*specs.State` structure in aim of achieving compatibility
with the latest version of runc and libcontainer (as of this commit,
v1.0.0-rc92).

Signed-off-by: Alexander Jung <a.jung@lancs.ac.uk>

Author: nderjung

go.mod

@@ -8,8 +8,7 @@ require (
 	github.com/genuinetools/pkg v0.0.0-20180910213200-1c141f661797
 	github.com/godbus/dbus v4.1.0+incompatible // indirect
 	github.com/onsi/gomega v1.4.2 // indirect
-	github.com/opencontainers/runc v0.0.0-20180920170208-00dc70017d22
-	github.com/opencontainers/runtime-spec v1.0.1 // indirect
+	github.com/opencontainers/runtime-spec v1.0.1
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/sirupsen/logrus v1.0.6
 	github.com/stretchr/testify v1.2.2 // indirect

go.sum

@@ -20,8 +20,6 @@ github.com/onsi/ginkgo v1.6.0 h1:Ix8l273rp3QzYgXSR+c8d1fTG7UPgYkOSELPhiY/YGw=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/gomega v1.4.2 h1:3mYCb7aPxS/RU7TI1y4rkEn1oKmPRjNJLNEXgw7MH2I=
 github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/opencontainers/runc v0.0.0-20180920170208-00dc70017d22 h1:7SedAwoOg6rLvFs91xPmi3NTkhyqqA2zABaqZ2tgf/U=
-github.com/opencontainers/runc v0.0.0-20180920170208-00dc70017d22/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runtime-spec v1.0.1 h1:wY4pOY8fBdSIvs9+IDHC55thBuEulhzfSgKeC1yFvzQ=
 github.com/opencontainers/runtime-spec v1.0.1/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

main.go

@@ -12,7 +12,7 @@ import (
 	"github.com/genuinetools/netns/network"
 	"github.com/genuinetools/netns/version"
 	"github.com/genuinetools/pkg/cli"
-	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 )
 
@@ -81,12 +81,12 @@ func main() {
 
 	// Set the main program action.
 	p.Action = func(ctx context.Context, args []string) error {
-		hook, err := readHookData()
+		s, err := readHookData()
 		if err != nil {
 			return err
 		}
 
-		ip, err := client.Create(hook, brOpt, staticip)
+		ip, err := client.Create(s, brOpt, staticip)
 		if err != nil {
 			return err
 		}
@@ -103,20 +103,20 @@ func main() {
 	p.Run()
 }
 
-// readHookData decodes stdin as HookState.
-func readHookData() (hook configs.HookState, err error) {
+// readHookData decodes stdin as *spec.State.
+func readHookData() (s *specs.State, err error) {
 	// Read hook data from stdin.
 	b, err := ioutil.ReadAll(os.Stdin)
 	if err != nil {
-		return hook, fmt.Errorf("reading hook data from stdin failed: %v", err)
+		return s, fmt.Errorf("reading hook data from stdin failed: %v", err)
 	}
 
 	// Umarshal the hook state.
-	if err := json.Unmarshal(b, &hook); err != nil {
-		return hook, fmt.Errorf("unmarshaling stdin as HookState failed: %v", err)
+	if err := json.Unmarshal(b, &s); err != nil {
+		return s, fmt.Errorf("unmarshaling stdin as specs.State failed: %v", err)
 	}
 
-	logrus.Debugf("hooks state: %#v", hook)
+	logrus.Debugf("hooks state: %#v", s)
 
-	return hook, nil
+	return s, nil
 }

network/create.go

@@ -7,16 +7,16 @@ import (
 
 	"github.com/genuinetools/netns/bridge"
 	"github.com/genuinetools/netns/netutils"
-	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
 	"github.com/vishvananda/netns"
 	bolt "go.etcd.io/bbolt"
 )
 
 // Create returns a container IP that was created with the given bridge name,
-// the settings from the HookState passed, and the bridge options.
-func (c *Client) Create(hook configs.HookState, brOpt bridge.Opt, staticip string) (net.IP, error) {
+// the settings from the spec.State passed, and the bridge options.
+func (c *Client) Create(s *specs.State, brOpt bridge.Opt, staticip string) (net.IP, error) {
 	var nsip net.IP
 	// Open the database.
 	if err := c.openDB(false); err != nil {
@@ -32,9 +32,9 @@ func (c *Client) Create(hook configs.HookState, brOpt bridge.Opt, staticip strin
 	}
 
 	// Create and attach local name to the bridge.
-	localVethPair, err := c.vethPair(hook.Pid, c.opt.BridgeName)
+	localVethPair, err := c.vethPair(s.Pid, c.opt.BridgeName)
 	if err != nil {
-		return nil, fmt.Errorf("getting vethpair for pid %d failed: %v", hook.Pid, err)
+		return nil, fmt.Errorf("getting vethpair for pid %d failed: %v", s.Pid, err)
 	}
 	if err := netlink.LinkAdd(localVethPair); err != nil {
 		return nil, fmt.Errorf("create veth pair named [ %#v ] failed: %v", localVethPair, err)
@@ -47,8 +47,8 @@ func (c *Client) Create(hook configs.HookState, brOpt bridge.Opt, staticip strin
 	}
 
 	// Put peer interface into the network namespace of specified PID.
-	if err := netlink.LinkSetNsPid(peer, hook.Pid); err != nil {
-		return nil, fmt.Errorf("adding peer interface to network namespace of pid %d failed: %v", hook.Pid, err)
+	if err := netlink.LinkSetNsPid(peer, s.Pid); err != nil {
+		return nil, fmt.Errorf("adding peer interface to network namespace of pid %d failed: %v", s.Pid, err)
 	}
 
 	// Bring the veth pair up.
@@ -83,7 +83,7 @@ func (c *Client) Create(hook configs.HookState, brOpt bridge.Opt, staticip strin
 	if staticip != "" {
 		nsip = net.ParseIP(staticip)
 	} else {
-		nsip, err = c.AllocateIP(hook.Pid)
+		nsip, err = c.AllocateIP(s.Pid)
 	}
 
 	if err != nil {
@@ -96,7 +96,7 @@ func (c *Client) Create(hook configs.HookState, brOpt bridge.Opt, staticip strin
 	}
 
 	// Configure the interface in the network namespace.
-	if err := c.configureInterface(localVethPair.PeerName, hook.Pid, newIP, ip.String()); err != nil {
+	if err := c.configureInterface(localVethPair.PeerName, s.Pid, newIP, ip.String()); err != nil {
 		return nil, err
 	}
 

network/create_test.go

@@ -8,7 +8,7 @@ import (
 	"testing"
 
 	"github.com/genuinetools/netns/bridge"
-	"github.com/opencontainers/runc/libcontainer/configs"
+	"github.com/opencontainers/runtime-spec/specs-go"
 )
 
 func TestCreateNetwork(t *testing.T) {
@@ -27,7 +27,7 @@ func TestCreateNetwork(t *testing.T) {
 	}
 	defer os.RemoveAll(defaultStateDir)
 
-	ip, err := c.Create(configs.HookState{
+	ip, err := c.Create(specs.State{
 		Pid: process.Pid,
 	}, bridge.Opt{
 		IPAddr: defaultBridgeIP,