Initial commit

.gitignore

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+# IntelliJ config
+.idea/
+
+# Build artifact
+kubectl-actuator-plugin

LICENSE

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+¯\_(ツ)_/¯

README.md

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+# kubectl-actuator-plugin
+
+## Purpose
+
+This kubectl cli plugin enables you to interact with the Spring Boot Actuator component.
+
+## Functionality
+
+Retrieving the logger configuration if an application:
+```
+❯ kubectl actuator logger get --pod ms-aks-dev-ms-asset-manager-66d5ff5f66-czp7w
+LOGGER                                               LEVEL
+ROOT                                                 INFO
+com.azure.core.amqp                                  WARN
+com.azure.messaging.eventhubs                        WARN
+com.deviceinsight.ms                                 INFO
+org.apache.catalina.startup.DigesterFactory          ERROR
+org.apache.catalina.util.LifecycleBase               ERROR
+org.apache.coyote.http11.Http11NioProtocol           WARN
+org.apache.sshd.common.util.SecurityUtils            WARN
+org.apache.tomcat.util.net.NioSelectorPool           WARN
+org.eclipse.jetty.util.component.AbstractLifeCycle   ERROR
+org.hibernate.validator.internal.util.Version        WARN
+org.springframework.boot.actuate.endpoint.jmx        WARN
+```
+
+Setting the level of a logger:
+```
+❯ kubectl actuator logger set --pod ms-aks-dev-ms-asset-manager-66d5ff5f66-czp7w com.deviceinsight.ms INFO
+```
+
+## Installation
+Right now there is no binary build available, so you have to build the plugin yourself:
+
+```
+❯ git clone git@gitlab.device-insight.com:mwa/kubectl-actuator-plugin.git
+❯ cd kubectl-actuator-plugin/
+❯ go build
+❯ cp -p kubectl-actuator-plugin ~/.local/bin/kubectl-actuator
+❯ kubectl actuator --help
+```
+
+## TODO
+* Code cleanup
+* Investigate why command line completion is not working
+  * Provide autocomplete support for logger and log levels
+* Validate log level options
+* Support deployments and statefulsets
+* Make Actuator port and URL configurable via pod labels
+* Support other actuator components

cmd/kubectl-actuator.go

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+package cmd
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+	"gitlab.device-insight.com/mwa/kubectl-actuator-plugin/pkg/cmd"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	"os"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "kubectl-actuator",
+	Short: "Control your Spring Boot applications via Actuator",
+}
+
+var loggerCmd = &cobra.Command{
+	Use:   "logger",
+	Short: "Inspect and manipulate your applications loggers",
+}
+
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	configFlags := genericclioptions.NewConfigFlags(true)
+
+	// Add k8s config flags and hide them
+	configFlags.AddFlags(rootCmd.PersistentFlags())
+	rootCmd.PersistentFlags().VisitAll(func(flag *pflag.Flag) {
+		flag.Hidden = true
+	})
+
+	rootCmd.AddCommand(loggerCmd)
+	loggerCmd.AddCommand(
+		cmd.NewLoggerGetCommand(configFlags),
+		cmd.NewLoggerSetCommand(configFlags),
+	)
+}

go.mod

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+module gitlab.device-insight.com/mwa/kubectl-actuator-plugin
+
+go 1.17
+
+require (
+	github.com/go-resty/resty/v2 v2.7.0
+	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de
+	github.com/pkg/errors v0.9.1
+	github.com/spf13/cobra v1.3.0
+	github.com/spf13/pflag v1.0.5
+	k8s.io/api v0.0.0-20220114212057-37c9308dad1e
+	k8s.io/apimachinery v0.0.0-20220114211744-3c16f3dcfb0b
+	k8s.io/cli-runtime v0.0.0-20220114215615-28aad093b364
+	k8s.io/client-go v0.0.0-20220114212508-092b54e6e535
+)
+
+require (
+	github.com/PuerkitoBio/purell v1.1.1 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
+	github.com/go-errors/errors v1.0.1 // indirect
+	github.com/go-logr/logr v1.2.0 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.19.5 // 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/btree v1.0.1 // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/google/uuid v1.1.2 // indirect
+	github.com/googleapis/gnostic v0.5.5 // indirect
+	github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7 // indirect
+	github.com/imdario/mergo v0.3.5 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // 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/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 // indirect
+	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	github.com/xlab/treeprint v0.0.0-20181112141820-a009c3971eca // indirect
+	go.starlark.net v0.0.0-20200306205701-8dd3e2ee1dd5 // indirect
+	golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect
+	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
+	golang.org/x/sys v0.0.0-20211205182925-97ca703d548d // indirect
+	golang.org/x/term v0.0.0-20210615171337-6886f2dfbf5b // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	k8s.io/klog/v2 v2.40.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20211115234752-e816edb12b65 // indirect
+	k8s.io/utils v0.0.0-20211208161948-7d6a63dca704 // indirect
+	sigs.k8s.io/json v0.0.0-20211208200746-9f7c6b3444d2 // indirect
+	sigs.k8s.io/kustomize/api v0.10.1 // indirect
+	sigs.k8s.io/kustomize/kyaml v0.13.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.1 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)
+
+replace (
+	k8s.io/api => k8s.io/api v0.0.0-20220114212057-37c9308dad1e
+	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20220114211744-3c16f3dcfb0b
+	k8s.io/cli-runtime => k8s.io/cli-runtime v0.0.0-20220114215615-28aad093b364
+	k8s.io/client-go => k8s.io/client-go v0.0.0-20220114212508-092b54e6e535
+)