diff --git a/cmd/config/config.go b/cmd/config/config.go index 3be4b3173..60b28885f 100644 --- a/cmd/config/config.go +++ b/cmd/config/config.go @@ -35,6 +35,7 @@ func NewConfigCommand(rootSettings *environment.AirshipCTLSettings) *cobra.Comma configRootCmd.AddCommand(NewSetAuthInfoCommand(rootSettings)) configRootCmd.AddCommand(NewGetAuthInfoCommand(rootSettings)) configRootCmd.AddCommand(NewUseContextCommand(rootSettings)) + configRootCmd.AddCommand(NewImportCommand(rootSettings)) return configRootCmd } diff --git a/cmd/config/import.go b/cmd/config/import.go new file mode 100644 index 000000000..456e3e0b1 --- /dev/null +++ b/cmd/config/import.go @@ -0,0 +1,58 @@ +/* + 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 + + https://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 config + +import ( + "fmt" + + "github.com/spf13/cobra" + + "opendev.org/airship/airshipctl/pkg/environment" +) + +const ( + useImportLong = ` +Merge the clusters, contexts, and users from an existing kubeConfig file into the airshipctl config file. +` + + useImportExample = ` +# Import from a kubeConfig file" +airshipctl config import $HOME/.kube/config +` +) + +// NewImportCommand creates a command that merges clusters, contexts, and +// users from a kubeConfig file into the airshipctl config file. +func NewImportCommand(rootSettings *environment.AirshipCTLSettings) *cobra.Command { + cmd := &cobra.Command{ + Use: "import ", + Short: "Merge information from a kubernetes config file", + Long: useImportLong[1:], + Example: useImportExample, + Args: cobra.ExactArgs(1), + RunE: func(cmd *cobra.Command, args []string) error { + kubeConfigPath := args[0] + err := rootSettings.Config.ImportFromKubeConfig(kubeConfigPath) + if err != nil { + return err + } + + fmt.Fprintf(cmd.OutOrStdout(), "Updated airship config with content imported from %q.\n", kubeConfigPath) + return nil + }, + } + + return cmd +} diff --git a/cmd/config/import_test.go b/cmd/config/import_test.go new file mode 100644 index 000000000..1e626c480 --- /dev/null +++ b/cmd/config/import_test.go @@ -0,0 +1,53 @@ +/* + +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 config_test + +import ( + "errors" + "testing" + + cmd "opendev.org/airship/airshipctl/cmd/config" + "opendev.org/airship/airshipctl/pkg/environment" + "opendev.org/airship/airshipctl/testutil" +) + +func TestConfigImport(t *testing.T) { + settings := &environment.AirshipCTLSettings{Config: testutil.DummyConfig()} + + cmdTests := []*testutil.CmdTest{ + { + Name: "config-import-with-help", + CmdLine: "--help", + Cmd: cmd.NewImportCommand(nil), + }, + { + Name: "config-import-no-args", + CmdLine: "", + Cmd: cmd.NewImportCommand(settings), + Error: errors.New("accepts 1 arg(s), received 0"), + }, + { + Name: "config-import-file-does-not-exist", + CmdLine: "foo", + Cmd: cmd.NewImportCommand(settings), + Error: errors.New("stat foo: no such file or directory"), + }, + } + + for _, tt := range cmdTests { + testutil.RunTest(t, tt) + } +} diff --git a/cmd/config/testdata/TestConfigGoldenOutput/config-cmd-with-help.golden b/cmd/config/testdata/TestConfigGoldenOutput/config-cmd-with-help.golden index 84d41a2d5..0dfeaf259 100644 --- a/cmd/config/testdata/TestConfigGoldenOutput/config-cmd-with-help.golden +++ b/cmd/config/testdata/TestConfigGoldenOutput/config-cmd-with-help.golden @@ -8,6 +8,7 @@ Available Commands: get-context Get context information from the airshipctl config get-credentials Get user credentials from the airshipctl config help Help about any command + import Merge information from a kubernetes config file init Generate initial configuration files for airshipctl set-cluster Manage clusters set-context Manage contexts diff --git a/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-file-does-not-exist.golden b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-file-does-not-exist.golden new file mode 100644 index 000000000..8e1a21907 --- /dev/null +++ b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-file-does-not-exist.golden @@ -0,0 +1,13 @@ +Error: stat foo: no such file or directory +Usage: + import [flags] + +Examples: + +# Import from a kubeConfig file" +airshipctl config import $HOME/.kube/config + + +Flags: + -h, --help help for import + diff --git a/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-no-args.golden b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-no-args.golden new file mode 100644 index 000000000..2bdb3dc3f --- /dev/null +++ b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-no-args.golden @@ -0,0 +1,13 @@ +Error: accepts 1 arg(s), received 0 +Usage: + import [flags] + +Examples: + +# Import from a kubeConfig file" +airshipctl config import $HOME/.kube/config + + +Flags: + -h, --help help for import + diff --git a/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-with-help.golden b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-with-help.golden new file mode 100644 index 000000000..d4b0a866c --- /dev/null +++ b/cmd/config/testdata/TestConfigImportGoldenOutput/config-import-with-help.golden @@ -0,0 +1,13 @@ +Merge the clusters, contexts, and users from an existing kubeConfig file into the airshipctl config file. + +Usage: + import [flags] + +Examples: + +# Import from a kubeConfig file" +airshipctl config import $HOME/.kube/config + + +Flags: + -h, --help help for import diff --git a/pkg/config/config.go b/pkg/config/config.go index 5e1cb9e5c..00dcd9a62 100644 --- a/pkg/config/config.go +++ b/pkg/config/config.go @@ -764,6 +764,93 @@ func (c *Config) ModifyAuthInfo(authinfo *AuthInfo, theAuthInfo *AuthInfoOptions } } +// ImportFromKubeconfig absorbs the clusters, contexts and credentials from the +// given kubeConfig +func (c *Config) ImportFromKubeConfig(kubeConfigPath string) error { + _, err := os.Stat(kubeConfigPath) + if err != nil { + return err + } + + kubeConfig, err := clientcmd.LoadFromFile(kubeConfigPath) + if err != nil { + return err + } + c.importClusters(kubeConfig) + c.importContexts(kubeConfig) + c.importAuthInfos(kubeConfig) + return c.PersistConfig() +} + +func (c *Config) importClusters(importKubeConfig *clientcmdapi.Config) { + for clusterName, cluster := range importKubeConfig.Clusters { + clusterComplexName := NewClusterComplexNameFromKubeClusterName(clusterName) + if _, err := c.GetCluster(clusterComplexName.Name, clusterComplexName.Type); err == nil { + // err == nil implies that we were successfully able to + // get the cluster from the existing configuration. + // Since existing clusters takes precedence, skip this cluster + continue + } + + // Initialize the new cluster for the airship configuration + airshipCluster := NewCluster() + airshipCluster.NameInKubeconf = clusterComplexName.String() + // Store the reference to the KubeConfig Cluster in the Airship Config + airshipCluster.SetKubeCluster(cluster) + + // Update the airship configuration + if _, ok := c.Clusters[clusterComplexName.Name]; !ok { + c.Clusters[clusterComplexName.Name] = NewClusterPurpose() + } + c.Clusters[clusterComplexName.Name].ClusterTypes[clusterComplexName.Type] = airshipCluster + c.kubeConfig.Clusters[clusterComplexName.String()] = cluster + } +} + +func (c *Config) importContexts(importKubeConfig *clientcmdapi.Config) { + // TODO(howell): This function doesn't handle the case when an incoming + // context refers to a cluster that doesn't exist in the airship + // configuration. + for kubeContextName, kubeContext := range importKubeConfig.Contexts { + if _, ok := c.kubeConfig.Contexts[kubeContextName]; ok { + // Since existing contexts take precedence, skip this context + continue + } + + clusterComplexName := NewClusterComplexNameFromKubeClusterName(kubeContext.Cluster) + if kubeContext.Cluster != clusterComplexName.String() { + // If the name of cluster from the kubeConfig doesn't + // match the clusterComplexName, it needs to be updated + kubeContext.Cluster = clusterComplexName.String() + } + + airshipContext, ok := c.Contexts[kubeContextName] + if !ok { + airshipContext = NewContext() + } + airshipContext.NameInKubeconf = kubeContext.Cluster + airshipContext.Manifest = AirshipDefaultManifest + airshipContext.SetKubeContext(kubeContext) + + // Store the contexts in the airship configuration + c.Contexts[kubeContextName] = airshipContext + c.kubeConfig.Contexts[kubeContextName] = kubeContext + } +} + +func (c *Config) importAuthInfos(importKubeConfig *clientcmdapi.Config) { + for key, authinfo := range importKubeConfig.AuthInfos { + if _, ok := c.AuthInfos[key]; ok { + // Since existing credentials take precedence, skip this credential + continue + } + + c.AuthInfos[key] = NewAuthInfo() + c.AuthInfos[key].SetKubeAuthInfo(authinfo) + c.kubeConfig.AuthInfos[key] = authinfo + } +} + // CurrentContextBootstrapInfo returns bootstrap info for current context func (c *Config) CurrentContextBootstrapInfo() (*Bootstrap, error) { currentCluster, err := c.CurrentContextCluster() diff --git a/pkg/config/config_helper.go b/pkg/config/config_helper.go index 776d4bde8..0254e12d2 100644 --- a/pkg/config/config_helper.go +++ b/pkg/config/config_helper.go @@ -159,6 +159,5 @@ func RunUseContext(desiredContext string, airconfig *Config) error { return err } } - return nil } diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go index cfb0c76b7..aa37293eb 100644 --- a/pkg/config/config_test.go +++ b/pkg/config/config_test.go @@ -18,7 +18,9 @@ package config_test import ( "fmt" + "io/ioutil" "os" + "path/filepath" "testing" "github.com/stretchr/testify/assert" @@ -602,3 +604,141 @@ func TestNewClusterComplexNameFromKubeClusterName(t *testing.T) { }) } } + +func TestImport(t *testing.T) { + conf, cleanupConfig := testutil.InitConfig(t) + defer cleanupConfig(t) + + kubeDir, cleanupKubeConfig := testutil.TempDir(t, "airship-import-tests") + defer cleanupKubeConfig(t) + + kubeConfigPath := filepath.Join(kubeDir, "config") + //nolint: lll + kubeConfigContent := ` +apiVersion: v1 +clusters: +- cluster: + server: https://1.2.3.4:9000 + name: cluster_target +- cluster: + server: https://1.2.3.4:9001 + name: dummycluster_ephemeral +- cluster: + server: https://1.2.3.4:9002 + name: def_target +- cluster: + server: https://1.2.3.4:9003 + name: noncomplex +contexts: +- context: + cluster: cluster_target + user: cluster-admin + name: cluster-admin@cluster +- context: + cluster: dummycluster_ephemeral + user: kubernetes-admin + name: dummy_cluster +- context: + cluster: dummycluster_ephemeral + user: kubernetes-admin + name: def_target +- context: + cluster: noncomplex + user: kubernetes-admin + name: noncomplex +current-context: dummy_cluster +kind: Config +preferences: {} +users: +- name: cluster-admin + user: + client-certificate-data: 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+ client-key-data: 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+- name: kubernetes-admin + user: + client-certificate-data: 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+ client-key-data: 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+- name: def-user + user: + client-certificate-data: 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+` + err := ioutil.WriteFile(kubeConfigPath, []byte(kubeConfigContent), 0644) + require.NoError(t, err) + + err = conf.ImportFromKubeConfig(kubeConfigPath) + require.NoError(t, err) + + t.Run("importClusters", func(t *testing.T) { + // Verify that only 3 clusters have been added (original 5 plus 3 new clusters) + // This is important since the above kubeconfig actually has 4 + // clusters, but one was already defined in the airship config + assert.Len(t, conf.Clusters, 5+3) + + // verify that the new clusters have been added to the config + _, err := conf.GetCluster("cluster", config.Target) + assert.NoError(t, err) + _, err = conf.GetCluster("dummycluster", config.Ephemeral) + assert.NoError(t, err) + + // verify that the "noncomplex" cluster was added as a target cluster + _, err = conf.GetCluster("noncomplex", config.Target) + assert.NoError(t, err) + }) + + t.Run("importContexts", func(t *testing.T) { + // Verify that only 3 contexts have been added (original 3 plus 3 new contexts) + // This is important since the above kubeconfig actually has 4 + // contexts, but one was already defined in the airship config + assert.Len(t, conf.Contexts, 3+3) + + // verify that the new contexts have been added to the config + _, err := conf.GetContext("cluster-admin@cluster") + assert.NoError(t, err) + _, err = conf.GetContext("dummy_cluster") + assert.NoError(t, err) + + // verify that the "noncomplex" context refers to the proper target "noncomplex" cluster + noncomplex, err := conf.GetContext("noncomplex") + require.NoError(t, err) + assert.Equal(t, "noncomplex_target", noncomplex.NameInKubeconf) + }) + + t.Run("importAuthInfos", func(t *testing.T) { + // Verify that only 2 users have been added (original 3 plus 2 new users) + // This is important since the above kubeconfig actually has 3 + // users, but one was already defined in the airship config + assert.Len(t, conf.AuthInfos, 3+2) + + // verify that the new users have been added to the config + _, err := conf.GetAuthInfo("cluster-admin") + assert.NoError(t, err) + _, err = conf.GetAuthInfo("kubernetes-admin") + assert.NoError(t, err) + }) +} + +func TestImportErrors(t *testing.T) { + conf, cleanupConfig := testutil.InitConfig(t) + defer cleanupConfig(t) + + t.Run("nonexistent kubeConfig", func(t *testing.T) { + err := conf.ImportFromKubeConfig("./non/existent/file/path") + assert.Contains(t, err.Error(), "no such file or directory") + }) + + t.Run("malformed kubeConfig", func(t *testing.T) { + kubeDir, cleanupKubeConfig := testutil.TempDir(t, "airship-import-tests") + defer cleanupKubeConfig(t) + + kubeConfigPath := filepath.Join(kubeDir, "config") + //nolint: lll + kubeConfigContent := "malformed content" + + err := ioutil.WriteFile(kubeConfigPath, []byte(kubeConfigContent), 0644) + require.NoError(t, err) + + err = conf.ImportFromKubeConfig(kubeConfigPath) + assert.Contains(t, err.Error(), "json parse error") + }) +}