CLI Check (#2341)

* added checks for kubernetes-version, fission-services and fission-version

* refactor kuberntes and fission version check

pkg/fission-cli/cmd/check/check.go

@@ -0,0 +1,50 @@
+/*
+Copyright 2022 The Fission 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 check
+
+import (
+	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
+	"github.com/fission/fission/pkg/fission-cli/cmd"
+	flagkey "github.com/fission/fission/pkg/fission-cli/flag/key"
+	"github.com/fission/fission/pkg/healthcheck"
+)
+
+type CheckSubCommand struct {
+	cmd.CommandActioner
+}
+
+func Check(input cli.Input) error {
+	return (&CheckSubCommand{}).do(input)
+}
+
+func (opts *CheckSubCommand) do(input cli.Input) error {
+
+	kubeContext := input.String(flagkey.KubeContext)
+
+	checks := []healthcheck.CategoryID{}
+
+	if input.IsSet(flagkey.PreCheckOnly) {
+		checks = append(checks, healthcheck.Kubernetes)
+	} else {
+		checks = append(checks, healthcheck.FissionServices, healthcheck.FissionVersion)
+	}
+
+	hc := healthcheck.NewHealthChecker(checks, &healthcheck.Options{
+		KubeContext:   kubeContext,
+		FissionClient: opts.Client(),
+	})
+
+	healthcheck.RunChecks(hc)
+	return nil
+}

pkg/fission-cli/cmd/check/command.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2022 The Fission 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 check
+
+import (
+	"github.com/spf13/cobra"
+
+	wrapper "github.com/fission/fission/pkg/fission-cli/cliwrapper/driver/cobra"
+	"github.com/fission/fission/pkg/fission-cli/flag"
+)
+
+func Commands() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "check",
+		Short: "Check the fission installation for potential problems",
+		Long:  `Check the fission installation for potential problems.`,
+		RunE:  wrapper.Wrapper(Check),
+	}
+	wrapper.SetFlags(command, flag.FlagSet{
+		Optional: []flag.Flag{flag.PreCheckOnly},
+	})
+
+	return command
+}

pkg/fission-cli/flag/flag.go

@@ -74,6 +74,8 @@ var (
 
 	ClientOnly = Flag{Type: Bool, Name: flagkey.ClientOnly, Usage: "If set, the CLI won't connect to remote server"}
 
+	PreCheckOnly = Flag{Type: Bool, Name: flagkey.PreCheckOnly, Usage: "Only run pre-installation checks, to determine if fission can be installed"}
+
 	KubeContext = Flag{Type: String, Name: flagkey.KubeContext, Usage: "Kubernetes context to be used for the execution of Fission commands", DefaultValue: ""}
 
 	IgnoreNotFound = Flag{Type: Bool, Name: flagkey.IgnoreNotFound, Usage: "Treat \"resource not found\" as a successful delete.", DefaultValue: false}

pkg/fission-cli/flag/key/key.go

@@ -22,6 +22,8 @@ const (
 	ClientOnly  = "client-only"
 	KubeContext = "kube-context"
 
+	PreCheckOnly = "pre"
+
 	resourceName = "name"
 	force        = "force"
 	Output       = "output"