Build & enable ctr with k3s server

cmd/ctr/main.go

-/*
-   Copyright The containerd Authors.
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
-*/
-
 package main
 
-import (
-	"fmt"
-	"os"
-
-	"github.com/containerd/containerd/cmd/ctr/app"
-	"github.com/containerd/containerd/pkg/seed"
-	"github.com/urfave/cli"
-)
-
-func init() {
-	seed.WithTimeAndRand()
-}
+import "github.com/rancher/k3s/pkg/ctr"
 
 func main() {
-	app := app.New()
-	for i, flag := range app.Flags {
-		if sFlag, ok := flag.(cli.StringFlag); ok {
-			if sFlag.Name == "address, a" {
-				sFlag.Value = "/run/k3s/containerd/containerd.sock"
-				app.Flags[i] = sFlag
-			} else if sFlag.Name == "namespace, n" {
-				sFlag.Value = "k8s.io"
-				app.Flags[i] = sFlag
-			}
-		}
-	}
-
-	if err := app.Run(os.Args); err != nil {
-		fmt.Fprintf(os.Stderr, "ctr: %s\n", err)
-		os.Exit(1)
-	}
+	ctr.Main()
 }

cmd/k3s/main.go

@@ -27,8 +27,8 @@ func main() {
 		cmds.NewServerCommand(wrap("k3s-server", os.Args)),
 		cmds.NewAgentCommand(wrap("k3s-agent", os.Args)),
 		cmds.NewKubectlCommand(externalCLIAction("kubectl")),
-		//cmds.NewCtrCommand(externalCLIAction("ctr")),
 		cmds.NewCRICTL(externalCLIAction("crictl")),
+		cmds.NewCtrCommand(externalCLIAction("ctr")),
 	}
 
 	err := app.Run(os.Args)

cmd/server/main.go

@@ -9,9 +9,11 @@ import (
 	"github.com/rancher/k3s/pkg/cli/agent"
 	"github.com/rancher/k3s/pkg/cli/cmds"
 	"github.com/rancher/k3s/pkg/cli/crictl"
+	"github.com/rancher/k3s/pkg/cli/ctr"
 	"github.com/rancher/k3s/pkg/cli/kubectl"
 	"github.com/rancher/k3s/pkg/cli/server"
 	"github.com/rancher/k3s/pkg/containerd"
+	ctr2 "github.com/rancher/k3s/pkg/ctr"
 	kubectl2 "github.com/rancher/k3s/pkg/kubectl"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -21,6 +23,7 @@ func init() {
 	reexec.Register("containerd", containerd.Main)
 	reexec.Register("kubectl", kubectl2.Main)
 	reexec.Register("crictl", crictl2.Main)
+	reexec.Register("ctr", ctr2.Main)
 }
 
 func main() {
@@ -37,6 +40,7 @@ func main() {
 		cmds.NewAgentCommand(agent.Run),
 		cmds.NewKubectlCommand(kubectl.Run),
 		cmds.NewCRICTL(crictl.Run),
+		cmds.NewCtrCommand(ctr.Run),
 	}
 
 	err := app.Run(os.Args)

pkg/cli/ctr/ctr.go

+package ctr
+
+import (
+	"github.com/rancher/k3s/pkg/ctr"
+	"github.com/urfave/cli"
+)
+
+func Run(ctx *cli.Context) error {
+	ctr.Main()
+	return nil
+}

pkg/ctr/main.go

+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package ctr
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/containerd/containerd/cmd/ctr/app"
+	"github.com/containerd/containerd/pkg/seed"
+	"github.com/urfave/cli"
+)
+
+func Main() {
+	main()
+}
+
+func main() {
+	seed.WithTimeAndRand()
+	app := app.New()
+	for i, flag := range app.Flags {
+		if sFlag, ok := flag.(cli.StringFlag); ok {
+			if sFlag.Name == "address, a" {
+				sFlag.Value = "/run/k3s/containerd/containerd.sock"
+				app.Flags[i] = sFlag
+			} else if sFlag.Name == "namespace, n" {
+				sFlag.Value = "k8s.io"
+				app.Flags[i] = sFlag
+			}
+		}
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, "ctr: %s\n", err)
+		os.Exit(1)
+	}
+}

scripts/build

@@ -23,7 +23,7 @@ if [ -z "$GOARM" ] && [ "arm" = "$(go env GOARCH)" ]; then
     GOARM=7
 fi
 
-rm -f bin/k3s-agent bin/hyperkube bin/containerd bin/cni ./bin/runc bin/containerd-shim bin/k3s-server bin/kubectl bin/crictl
+rm -f bin/k3s-agent bin/hyperkube bin/containerd bin/cni ./bin/runc bin/containerd-shim bin/k3s-server bin/kubectl bin/crictl bin/ctr
 # echo Building agent
 # CGO_ENABLED=1 go build -tags "$TAGS" -ldflags "$LDFLAGS $STATIC" -o bin/k3s-agent ./cmd/agent/main.go
 echo Building server
@@ -32,6 +32,7 @@ ln -s containerd ./bin/k3s-agent
 ln -s containerd ./bin/k3s-server
 ln -s containerd ./bin/kubectl
 ln -s containerd ./bin/crictl
+ln -s containerd ./bin/ctr
 echo Building hyperkube
 CGO_ENABLED=1 go build -tags "$TAGS" -ldflags "$LDFLAGS $STATIC_SQLITE" -o bin/hyperkube ./vendor/k8s.io/kubernetes/cmd/hyperkube/
 #echo Building ctr