Add create secret git command

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/create_secret.go

@@ -0,0 +1,52 @@
+/*
+Copyright 2020 The Flux 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"
+
+	"github.com/spf13/cobra"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/yaml"
+)
+
+var createSecretCmd = &cobra.Command{
+	Use:   "secret",
+	Short: "Create or update Kubernetes secrets",
+	Long:  "The create source sub-commands generate Kubernetes secrets specific to Flux.",
+}
+
+func init() {
+	createCmd.AddCommand(createSecretCmd)
+}
+
+func exportSecret(secret corev1.Secret) error {
+	secret.TypeMeta = metav1.TypeMeta{
+		APIVersion: "v1",
+		Kind:       "Secret",
+	}
+
+	data, err := yaml.Marshal(secret)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("---")
+	fmt.Println(resourceToString(data))
+	return nil
+}

cmd/flux/create_secret_git.go

@@ -0,0 +1,173 @@
+/*
+Copyright 2020 The Flux 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 (
+	"context"
+	"crypto/elliptic"
+	"fmt"
+	"net/url"
+
+	"github.com/spf13/cobra"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"github.com/fluxcd/flux2/internal/flags"
+	"github.com/fluxcd/flux2/internal/utils"
+)
+
+var createSecretGitCmd = &cobra.Command{
+	Use:   "git [name]",
+	Short: "Create or update a Kubernetes secret for Git authentication",
+	Long: `
+The create secret git command generates a Kubernetes secret with Git credentials.
+For Git over SSH, the host and SSH keys are automatically generated and stored in the secret.
+For Git over HTTP/S, the provided basic authentication credentials are stored in the secret.`,
+	Example: `  # Create a Git SSH authentication secret using an ECDSA P-521 curve public key
+
+  flux create secret git podinfo-auth \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+    --ssh-key-algorithm=ecdsa \
+    --ssh-ecdsa-curve=p521
+
+  # Create a secret for a Git repository using basic authentication
+  flux create secret git podinfo-auth \
+    --url=https://github.com/stefanprodan/podinfo \
+    --username=username \
+    --password=password
+
+  # Create a Git SSH secret on disk and print the deploy key
+  flux create secret git podinfo-auth \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+	--export > podinfo-auth.yaml
+
+  yq read podinfo-auth.yaml 'data."identity.pub"' | base64 --decode
+
+  # Create a Git SSH secret on disk and encrypt it with Mozilla SOPS
+  flux create secret git podinfo-auth \
+    --namespace=apps \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+	--export > podinfo-auth.yaml
+
+  sops --encrypt --encrypted-regex '^(data|stringData)$' \
+    --in-place podinfo-auth.yaml
+`,
+	RunE: createSecretGitCmdRun,
+}
+
+var (
+	secretGitURL          string
+	secretGitUsername     string
+	secretGitPassword     string
+	secretGitKeyAlgorithm flags.PublicKeyAlgorithm = "rsa"
+	secretGitRSABits      flags.RSAKeyBits         = 2048
+	secretGitECDSACurve                            = flags.ECDSACurve{Curve: elliptic.P384()}
+)
+
+func init() {
+	createSecretGitCmd.Flags().StringVar(&secretGitURL, "url", "", "git address, e.g. ssh://git@host/org/repository")
+	createSecretGitCmd.Flags().StringVarP(&secretGitUsername, "username", "u", "", "basic authentication username")
+	createSecretGitCmd.Flags().StringVarP(&secretGitPassword, "password", "p", "", "basic authentication password")
+	createSecretGitCmd.Flags().Var(&secretGitKeyAlgorithm, "ssh-key-algorithm", sourceGitKeyAlgorithm.Description())
+	createSecretGitCmd.Flags().Var(&secretGitRSABits, "ssh-rsa-bits", sourceGitRSABits.Description())
+	createSecretGitCmd.Flags().Var(&secretGitECDSACurve, "ssh-ecdsa-curve", sourceGitECDSACurve.Description())
+
+	createSecretCmd.AddCommand(createSecretGitCmd)
+}
+
+func createSecretGitCmdRun(cmd *cobra.Command, args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("secret name is required")
+	}
+	name := args[0]
+
+	if secretGitURL == "" {
+		return fmt.Errorf("url is required")
+	}
+
+	u, err := url.Parse(secretGitURL)
+	if err != nil {
+		return fmt.Errorf("git URL parse failed: %w", err)
+	}
+
+	secretLabels, err := parseLabels()
+	if err != nil {
+		return err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	secret := corev1.Secret{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:      name,
+			Namespace: namespace,
+			Labels:    secretLabels,
+		},
+	}
+
+	switch u.Scheme {
+	case "ssh":
+		pair, err := generateKeyPair(ctx)
+		if err != nil {
+			return err
+		}
+
+		hostKey, err := scanHostKey(ctx, u)
+		if err != nil {
+			return err
+		}
+
+		secret.Data = map[string][]byte{
+			"identity":     pair.PrivateKey,
+			"identity.pub": pair.PublicKey,
+			"known_hosts":  hostKey,
+		}
+
+		if !export {
+			logger.Generatef("deploy key: %s", string(pair.PublicKey))
+		}
+	case "http", "https":
+		if sourceGitUsername == "" || sourceGitPassword == "" {
+			return fmt.Errorf("for Git over HTTP/S the username and password are required")
+		}
+
+		// TODO: add cert data when it's implemented in source-controller
+		secret.Data = map[string][]byte{
+			"username": []byte(secretGitUsername),
+			"password": []byte(secretGitPassword),
+		}
+	default:
+		return fmt.Errorf("git URL scheme '%s' not supported, can be: ssh, http and https", u.Scheme)
+	}
+
+	if export {
+		return exportSecret(secret)
+	}
+
+	kubeClient, err := utils.KubeClient(kubeconfig, kubecontext)
+	if err != nil {
+		return err
+	}
+
+	if err := upsertSecret(ctx, kubeClient, secret); err != nil {
+		return err
+	}
+	logger.Actionf("secret '%s' created in '%s' namespace", name, namespace)
+
+	return nil
+}

docs/cmd/flux_create.md

@@ -33,6 +33,7 @@ The create sub-commands generate sources and resources.
 * [flux create helmrelease](flux_create_helmrelease.md)	 - Create or update a HelmRelease resource
 * [flux create kustomization](flux_create_kustomization.md)	 - Create or update a Kustomization resource
 * [flux create receiver](flux_create_receiver.md)	 - Create or update a Receiver resource
+* [flux create secret](flux_create_secret.md)	 - Create or update Kubernetes secrets
 * [flux create source](flux_create_source.md)	 - Create or update sources
 * [flux create tenant](flux_create_tenant.md)	 - Create or update a tenant
 

docs/cmd/flux_create_secret.md

@@ -0,0 +1,32 @@
+## flux create secret
+
+Create or update Kubernetes secrets
+
+### Synopsis
+
+The create source sub-commands generate Kubernetes secrets specific to Flux.
+
+### Options
+
+```
+  -h, --help   help for secret
+```
+
+### Options inherited from parent commands
+
+```
+      --context string      kubernetes context to use
+      --export              export in YAML format to stdout
+      --interval duration   source sync interval (default 1m0s)
+      --kubeconfig string   path to the kubeconfig file (default "~/.kube/config")
+      --label strings       set labels on the resource (can specify multiple labels with commas: label1=value1,label2=value2)
+  -n, --namespace string    the namespace scope for this operation (default "flux-system")
+      --timeout duration    timeout for this operation (default 5m0s)
+      --verbose             print generated objects
+```
+
+### SEE ALSO
+
+* [flux create](flux_create.md)	 - Create or update sources and resources
+* [flux create secret git](flux_create_secret_git.md)	 - Create or update a Kubernetes secret for Git authentication
+

docs/cmd/flux_create_secret_git.md

@@ -0,0 +1,78 @@
+## flux create secret git
+
+Create or update a Kubernetes secret for Git authentication
+
+### Synopsis
+
+
+The create secret git command generates a Kubernetes secret with Git credentials.
+For Git over SSH, the host and SSH keys are automatically generated and stored in the secret.
+For Git over HTTP/S, the provided basic authentication credentials are stored in the secret.
+
+```
+flux create secret git [name] [flags]
+```
+
+### Examples
+
+```
+  # Create a Git SSH authentication secret using an ECDSA P-521 curve public key
+
+  flux create secret git podinfo-auth \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+    --ssh-key-algorithm=ecdsa \
+    --ssh-ecdsa-curve=p521
+
+  # Create a secret for a Git repository using basic authentication
+  flux create secret git podinfo-auth \
+    --url=https://github.com/stefanprodan/podinfo \
+    --username=username \
+    --password=password
+
+  # Create a Git SSH secret on disk and print the deploy key
+  flux create secret git podinfo-auth \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+	--export > podinfo-auth.yaml
+
+  yq read podinfo-auth.yaml 'data."identity.pub"' | base64 --decode
+
+  # Create a Git SSH secret on disk and encrypt it with Mozilla SOPS
+  flux create secret git podinfo-auth \
+    --namespace=apps \
+    --url=ssh://git@github.com/stefanprodan/podinfo \
+	--export > podinfo-auth.yaml
+
+  sops --encrypt --encrypted-regex '^(data|stringData)$' \
+    --in-place podinfo-auth.yaml
+
+```
+
+### Options
+
+```
+  -h, --help                                   help for git
+  -p, --password string                        basic authentication password
+      --ssh-ecdsa-curve ecdsaCurve             SSH ECDSA public key curve (p256, p384, p521) (default p384)
+      --ssh-key-algorithm publicKeyAlgorithm   SSH public key algorithm (rsa, ecdsa, ed25519) (default rsa)
+      --ssh-rsa-bits rsaKeyBits                SSH RSA public key bit size (multiplies of 8) (default 2048)
+      --url string                             git address, e.g. ssh://git@host/org/repository
+  -u, --username string                        basic authentication username
+```
+
+### Options inherited from parent commands
+
+```
+      --context string      kubernetes context to use
+      --export              export in YAML format to stdout
+      --interval duration   source sync interval (default 1m0s)
+      --kubeconfig string   path to the kubeconfig file (default "~/.kube/config")
+      --label strings       set labels on the resource (can specify multiple labels with commas: label1=value1,label2=value2)
+  -n, --namespace string    the namespace scope for this operation (default "flux-system")
+      --timeout duration    timeout for this operation (default 5m0s)
+      --verbose             print generated objects
+```
+
+### SEE ALSO
+
+* [flux create secret](flux_create_secret.md)	 - Create or update Kubernetes secrets
+

mkdocs.yml

@@ -96,6 +96,8 @@ nav:
     - Create alert: cmd/flux_create_alert.md
     - Create receiver: cmd/flux_create_receiver.md
     - Create tenant: cmd/flux_create_tenant.md
+    - Create secret: cmd/flux_create_secret.md
+    - Create secret git: cmd/flux_create_secret_git.md
     - Delete: cmd/flux_delete.md
     - Delete kustomization: cmd/flux_delete_kustomization.md
     - Delete helmrelease: cmd/flux_delete_helmrelease.md