core: move project to golang

starting migration from bash to go, starting with
basic ceph commands and getting mons endpoint

Signed-off-by: subhamkrai <srai@redhat.com>

.github/workflows/go-test.yaml

@@ -0,0 +1,39 @@
+name: Plugin Go test
+on:
+  pull_request:
+
+defaults:
+  run:
+    # reference: https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#using-a-specific-shell
+    shell: bash --noprofile --norc -eo pipefail -x {0}
+
+jobs:
+  with-krew:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: setup golang
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.19
+
+      - name: setup cluster
+        uses: ./.github/workflows/cluster-setup
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: build the binary
+        run: |
+          make build
+          sudo cp kubectl-rook-ceph /usr/local/bin/kubectl-rook_ceph
+
+      - name: Test plugin with ceph commands
+        run: |
+          sleep 60s
+          kubectl rook-ceph ceph status
+          kubectl rook-ceph mons
+          kubectl rook-ceph rbd ls replicapool

Makefile

@@ -0,0 +1,26 @@
+# Copyright 2016 The Rook Authors. All rights reserved.
+#
+# 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.
+
+
+build:
+	gofmt -w $(shell find . -type f -name '*.go')
+	@echo
+	env GOOS=$(shell go env GOOS) GOARCH=$(shell go env GOARCH) go build -o kubectl-rook-ceph  cmd/main.go
+
+clean:
+	rm kubectl-rook-ceph
+
+help :
+	@echo "build : Create go binary."
+	@echo "clean : Remove go binary file."

cmd/commands/ceph.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2023 The Rook Authors. All rights reserved.
+
+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 command
+
+import (
+	k8sutil "github.com/kubectl-rook-ceph/pkg/k8sutil"
+
+	"github.com/spf13/cobra"
+)
+
+// CephCmd represents the ceph command
+var CephCmd = &cobra.Command{
+	Use:                "ceph",
+	Short:              "call a 'ceph' CLI command with arbitrary args",
+	DisableFlagParsing: true,
+	Args:               cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		k8sutil.RunCommandInOperatorPod(cmd.Use, args, OperatorNamespace, CephClusterNamespace)
+	},
+}

cmd/commands/mons.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2023 The Rook Authors. All rights reserved.
+
+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 command
+
+import (
+	"github.com/kubectl-rook-ceph/pkg/mons"
+	"github.com/spf13/cobra"
+)
+
+// MonCmd represents the mons command
+var MonCmd = &cobra.Command{
+	Use:                "mons",
+	Short:              "Output mon endpoints",
+	DisableFlagParsing: true,
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args) == 0 {
+			mons.GetMonEndpoint(CephClusterNamespace)
+		}
+	},
+}

cmd/commands/rbd.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2023 The Rook Authors. All rights reserved.
+
+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 command
+
+import (
+	k8sutil "github.com/kubectl-rook-ceph/pkg/k8sutil"
+
+	"github.com/spf13/cobra"
+)
+
+// RbdCmd represents the rbd command
+var RbdCmd = &cobra.Command{
+	Use:                "rbd",
+	Short:              "call a 'rbd' CLI command with arbitrary args",
+	DisableFlagParsing: true,
+	Args:               cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		k8sutil.RunCommandInOperatorPod(cmd.Use, args, OperatorNamespace, CephClusterNamespace)
+	},
+}

cmd/commands/root.go

@@ -0,0 +1,55 @@
+/*
+Copyright 2023 The Rook Authors. All rights reserved.
+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 command
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var (
+	KubeConfig           string
+	OperatorNamespace    string
+	CephClusterNamespace string
+)
+
+// rookCmd represents the rook command
+var RootCmd = &cobra.Command{
+	Use:   "rook-ceph",
+	Short: "kubectl rook-ceph provides common management and troubleshooting tools for Ceph.",
+	Args:  cobra.MinimumNArgs(1),
+}
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	cobra.CheckErr(RootCmd.Execute())
+}
+
+func init() {
+
+	// Define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// rookCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// rookCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+	RootCmd.PersistentFlags().StringVar(&KubeConfig, "kubeconfig", "", "kubernetes config path")
+	RootCmd.PersistentFlags().StringVar(&OperatorNamespace, "opeator-namespace", "rook-ceph", "Kubernetes namespace where rook operator is running")
+	RootCmd.PersistentFlags().StringVar(&CephClusterNamespace, "namespace", "rook-ceph", "Kubernetes namespace where ceph cluster is created")
+}

cmd/main.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2023 The Rook Authors. All rights reserved.
+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 command "github.com/kubectl-rook-ceph/cmd/commands"
+
+func main() {
+	addcommands()
+	command.RootCmd.Execute()
+}
+
+func addcommands() {
+	command.RootCmd.AddCommand(
+		command.CephCmd,
+		command.MonCmd,
+		command.RbdCmd,
+	)
+}

go.mod

@@ -0,0 +1,52 @@
+module github.com/kubectl-rook-ceph
+
+go 1.19
+
+require (
+	github.com/sirupsen/logrus v1.9.0
+	github.com/spf13/cobra v1.6.1
+	k8s.io/api v0.26.0
+	k8s.io/apimachinery v0.26.0
+	k8s.io/client-go v0.26.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful/v3 v3.9.0 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.20.0 // indirect
+	github.com/go-openapi/swag v0.19.14 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/gnostic v0.5.7-v3refs // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/inconshreveable/mousetrap v1.0.1 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mailru/easyjson v0.7.6 // indirect
+	github.com/moby/spdystream v0.2.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/net v0.5.0 // indirect
+	golang.org/x/oauth2 v0.0.0-20220223155221-ee480838109b // indirect
+	golang.org/x/sys v0.4.0 // indirect
+	golang.org/x/term v0.4.0 // indirect
+	golang.org/x/text v0.6.0 // indirect
+	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/klog/v2 v2.80.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280 // indirect
+	k8s.io/utils v0.0.0-20221107191617-1a15be271d1d // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
+)