├── .gitignore ├── .vscode └── launch.json ├── LICENSE-2.0 ├── Makefile ├── README.md ├── SopsConfigMap.go ├── SopsSecret.go ├── kustomization.yaml ├── kustomize-enable.patch ├── kustomize.patch ├── kustomize_secrets.yaml ├── secrets.enc.yaml └── secrets.yaml /.gitignore: -------------------------------------------------------------------------------- 1 | sigs.k8s.io/ 2 | *.swp 3 | -------------------------------------------------------------------------------- /.vscode/launch.json: -------------------------------------------------------------------------------- 1 | { 2 | // Use IntelliSense to learn about possible attributes. 3 | // Hover to view descriptions of existing attributes. 4 | // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 5 | "version": "0.2.0", 6 | "configurations": [ 7 | { 8 | "name": "Launch", 9 | "type": "go", 10 | "request": "launch", 11 | "mode": "exec", 12 | "program": "/home/don/bin/kustomize", 13 | "env": {}, 14 | "args": ["build", "--enable_alpha_plugins", "/home/don/src-ag/tooling/deploy/overlays/gke-prod-yul/user-portal"] 15 | } 16 | ] 17 | } 18 | -------------------------------------------------------------------------------- /LICENSE-2.0: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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The text should be enclosed in the appropriate 185 | comment syntax for the file format. We also recommend that a 186 | file or class name and description of purpose be included on the 187 | same "printed page" as the copyright notice for easier 188 | identification within third-party archives. 189 | 190 | Copyright [yyyy] [name of copyright owner] 191 | 192 | Licensed under the Apache License, Version 2.0 (the "License"); 193 | you may not use this file except in compliance with the License. 194 | You may obtain a copy of the License at 195 | 196 | http://www.apache.org/licenses/LICENSE-2.0 197 | 198 | Unless required by applicable law or agreed to in writing, software 199 | distributed under the License is distributed on an "AS IS" BASIS, 200 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 201 | See the License for the specific language governing permissions and 202 | limitations under the License. 203 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | all: ~/bin/kustomize ~/.config/kustomize/plugin/kustomize-sops/v1/sopssecret/SopsSecret.so sigs.k8s.io/kustomize/go.mod 2 | 3 | sigs.k8s.io/kustomize/go.mod: 4 | export GO111MODULE=on 5 | mkdir -p sigs.k8s.io 6 | git clone https://github.com/kubernetes-sigs/kustomize.git sigs.k8s.io/kustomize 7 | (cd sigs.k8s.io/kustomize; git checkout 0707deae95e0659246b4da0a29a72949ac24b7c2) 8 | mkdir -p ~/.config/kustomize/plugin/kustomize-sops/v1/sopssecret 9 | ln -s $$PWD/SopsSecret.go $$PWD/sigs.k8s.io/kustomize/plugin/ 10 | patch -p1 < kustomize.patch 11 | patch -p1 < kustomize-enable.patch 12 | 13 | ~/.config/kustomize/plugin/kustomize-sops/v1/sopssecret/SopsSecret.so: ~/bin/kustomize SopsSecret.go 14 | (cd sigs.k8s.io/kustomize; go build -buildmode plugin -o ~/.config/kustomize/plugin/kustomize-sops/v1/sopssecret/SopsSecret.so plugin/SopsSecret.go) 15 | 16 | ~/bin/kustomize: sigs.k8s.io/kustomize/go.mod 17 | (cd sigs.k8s.io/kustomize; go build -o ~/bin/kustomize cmd/kustomize/main.go) 18 | 19 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## kustomize-sops 2 | 3 | This is a *very* simple wrapper to allow use of [sops](https://github.com/mozilla/sops) 4 | encoded secrets within [kustomize](https://github.com/kubernetes-sigs/kustomize). 5 | 6 | It assumes that there exists a single `secrets.enc.yaml` file, and in it there is a 7 | 1-deep YAML representation of `SECRET: VALUE`. 8 | 9 | Assume you had a _raw_ secrets as secrets.yaml: 10 | 11 | ``` 12 | CAT: ferocious 13 | DOG: tame 14 | ``` 15 | 16 | You would then encrypt it something like: 17 | 18 | ``` 19 | sops --encrypt --gcp-kms projects/MYPROJECT/locations/global/keyRings/sops/cryptoKeys/sops-key secrets.yaml > secrets.enc.yaml 20 | ``` 21 | 22 | You would use a `kustomization.yaml` file as: 23 | 24 | ``` 25 | --- 26 | apiVersion: kustomize-sops/v1 27 | kind: SopsSecret 28 | name: my-secret 29 | namespace: bar 30 | source: secrets.enc.yaml 31 | metadata: 32 | name: not-used 33 | keys: 34 | - CAT 35 | ``` 36 | 37 | If keys is empty (e.g. `keys: []`), then all keys are imported. 38 | 39 | And then running `kustomize build --enable_alpha_plugins .` would yield: 40 | 41 | ``` 42 | apiVersion: v1 43 | data: 44 | CAT: ZmVyb2Npb3Vz 45 | kind: Secret 46 | metadata: 47 | name: my-secret-hkbkhc8h2b 48 | namespace: bar 49 | type: Opaque 50 | ``` 51 | 52 | You may wish to try: 53 | `type: kubernetes.io/dockerconfigjson` if using a docker config. 54 | 55 | 56 | More information is in the [blog](https://www.agilicus.com/safely-secure-secrets-a-sops-plugin-for-kustomize/) post. 57 | 58 | ### Install Pre-requisites 59 | 60 | ### Build & Install plugin 61 | 62 | This is a bit complex since Go plugins are *unbelievably* brittle, all packages in both sides must be identical. 63 | Effectively they must be built in the same tree at the same time. 64 | 65 | To build, run `make`. Note: the result is both `kustomize` and the plugin, you must use the `kustomize` 66 | that this builds. 67 | 68 | It will output two files: 69 | ``` 70 | ~/bin/kustomize 71 | ~/.config/kustomize/plugin/kustomize-sops/v1/sopssecret/SopsSecret.so 72 | ``` 73 | 74 | If you have ~/bin on your path, it should work from here. 75 | 76 | I have build this with 77 | ``` 78 | $ go version 79 | go version go1.13.7 linux/amd64 80 | ``` 81 | 82 | I am not sure how sensitive it is to changes. 83 | 84 | ### Test/Run 85 | 86 | ``` 87 | kustomize build --enable_alpha_plugins . 88 | ``` 89 | 90 | ### Setup encrypted secrets 91 | 92 | ``` 93 | gcloud auth application-default login 94 | gcloud kms keyrings create sops --location global 95 | gcloud kms keys create sops-key --location global --keyring sops --purpose encryption 96 | gcloud kms keys list --location global --keyring sops 97 | # NAME PURPOSE LABELS PRIMARY_ID PRIMARY_STATE 98 | # projects/MYPROJECT/locations/global/keyRings/sops/cryptoKeys/sops-key ENCRYPT_DECRYPT 1 ENABLED 99 | 100 | sops --encrypt --gcp-kms projects/MYPROJECT/locations/global/keyRings/sops/cryptoKeys/sops-key secrets.yaml > secrets.enc.yaml 101 | ``` 102 | 103 | ### Notes 104 | 105 | The interface in `kustomize` for plugins is extremely brittle. They effectively 106 | don't work unless compiled at the same time as kustomize. 107 | 108 | See [kustomize-plugins](https://github.com/Agilicus/kustomize-plugins/) for exec-based 109 | plugins that achieve the same purpose as above, but are not as brittle. 110 | 111 | The patch... see https://github.com/kubernetes-sigs/kustomize/pull/1075#issuecomment-504551553 112 | -------------------------------------------------------------------------------- /SopsConfigMap.go: -------------------------------------------------------------------------------- 1 | // Copyright 2019 Agilicus Incorporated 2 | // SPDX-License-Identifier: Apache-2.0 3 | 4 | package main 5 | 6 | import ( 7 | "log" 8 | "path/filepath" 9 | 10 | "go.mozilla.org/sops/decrypt" 11 | "sigs.k8s.io/kustomize/v3/pkg/ifc" 12 | "sigs.k8s.io/kustomize/v3/pkg/resmap" 13 | "sigs.k8s.io/kustomize/v3/pkg/types" 14 | "sigs.k8s.io/yaml" 15 | ) 16 | 17 | type plugin struct { 18 | ldr ifc.Loader 19 | rf *resmap.Factory 20 | types.GeneratorOptions `json:"generatorOptions,omitempty" yaml:"generatorOptions,omitempty"` 21 | types.ConfigMapArgs 22 | 23 | Name string `json:"name,omitempty" yaml:"name,omitempty"` 24 | Namespace string `json:"namespace,omitempty" yaml:"namespace,omitempty"` 25 | Source string `json:"source,omitempty" yaml:"source,omitempty"` 26 | // List of keys to use in database lookups 27 | Keys []string `json:"keys,omitempty" yaml:"keys,omitempty"` 28 | } 29 | 30 | // KustomizePlugin ... 31 | //noinspection GoUnusedGlobalVariable 32 | //nolint: golint 33 | var KustomizePlugin plugin 34 | 35 | func (p *plugin) Config( 36 | ldr ifc.Loader, rf *resmap.Factory, c []byte) error { 37 | p.ConfigMapArgs = types.ConfigMapArgs{} 38 | p.GeneratorOptions = types.GeneratorOptions{} 39 | p.rf = rf 40 | p.ldr = ldr 41 | return yaml.Unmarshal(c, p) 42 | } 43 | 44 | // (root string, args []string) (map[string]string, error) { 45 | func (p *plugin) Generate() (resmap.ResMap, error) { 46 | args := types.ConfigMapArgs{} 47 | args.Name = p.Name 48 | args.Namespace = p.Namespace 49 | args.GeneratorArgs.Behavior = "merge" 50 | 51 | if len(p.Source) == 0 { 52 | p.Source = "secrets.enc.yaml" 53 | } 54 | 55 | secret := make(map[string]string) 56 | secretFile := filepath.Join(p.ldr.Root(), p.Source) 57 | 58 | v, err := decrypt.File(secretFile, "yaml") 59 | if err != nil { 60 | log.Fatalf("error: cannot decode file %s :: %v", secretFile, err) 61 | } 62 | err = yaml.Unmarshal([]byte(v), &secret) 63 | if err != nil { 64 | log.Fatalf("error: cannot unmarshal %s as yaml :: %v", secretFile, err) 65 | } 66 | 67 | if len(p.Keys) == 0 { 68 | for k := range secret { 69 | p.Keys = append(p.Keys, k) 70 | } 71 | } 72 | 73 | for _, k := range p.Keys { 74 | v, ok := secret[k] 75 | if ok { 76 | args.LiteralSources = append(args.LiteralSources, k+"="+v) 77 | } else { 78 | log.Fatalf("error: key <%s> not present in %s\n", k, secretFile) 79 | } 80 | } 81 | 82 | return p.rf.FromConfigMapArgs(p.ldr, &p.GeneratorOptions, args) 83 | } 84 | -------------------------------------------------------------------------------- /SopsSecret.go: -------------------------------------------------------------------------------- 1 | // Copyright 2019 Agilicus Incorporated 2 | // SPDX-License-Identifier: Apache-2.0 3 | 4 | package main 5 | 6 | import ( 7 | "go.mozilla.org/sops/decrypt" 8 | "log" 9 | "path/filepath" 10 | "sigs.k8s.io/kustomize/v3/pkg/ifc" 11 | "sigs.k8s.io/kustomize/v3/pkg/resmap" 12 | "sigs.k8s.io/kustomize/v3/pkg/types" 13 | "sigs.k8s.io/yaml" 14 | ) 15 | 16 | type plugin struct { 17 | ldr ifc.Loader 18 | rf *resmap.Factory 19 | types.GeneratorOptions `json:"generatorOptions,omitempty" yaml:"generatorOptions,omitempty"` 20 | types.SecretArgs 21 | 22 | Name string `json:"name,omitempty" yaml:"name,omitempty"` 23 | Namespace string `json:"namespace,omitempty" yaml:"namespace,omitempty"` 24 | Source string `json:"source,omitempty" yaml:"source,omitempty"` 25 | // List of keys to use in database lookups 26 | Keys []string `json:"keys,omitempty" yaml:"keys,omitempty"` 27 | } 28 | 29 | //noinspection GoUnusedGlobalVariable 30 | //nolint: golint 31 | var KustomizePlugin plugin 32 | 33 | func (p *plugin) Config( 34 | ldr ifc.Loader, rf *resmap.Factory, c []byte) error { 35 | p.SecretArgs = types.SecretArgs{} 36 | p.GeneratorOptions = types.GeneratorOptions{} 37 | p.rf = rf 38 | p.ldr = ldr 39 | return yaml.Unmarshal(c, p) 40 | } 41 | 42 | // (root string, args []string) (map[string]string, error) { 43 | func (p *plugin) Generate() (resmap.ResMap, error) { 44 | args := types.SecretArgs{} 45 | args.Name = p.Name 46 | args.Type = p.Type 47 | args.Namespace = p.Namespace 48 | args.GeneratorArgs.Behavior = "merge" 49 | 50 | if len(p.Source) == 0 { 51 | p.Source = "secrets.enc.yaml" 52 | } 53 | 54 | secret := make(map[string]string) 55 | secret_file := filepath.Join(p.ldr.Root(), p.Source) 56 | 57 | v, err := decrypt.File(secret_file, "yaml") 58 | if err != nil { 59 | log.Fatalf("error: cannot decode file %s :: %v", secret_file, err) 60 | } 61 | err = yaml.Unmarshal([]byte(v), &secret) 62 | if err != nil { 63 | log.Fatalf("error: cannot unmarshal %s as yaml :: %v", secret_file, err) 64 | } 65 | 66 | if len(p.Keys) == 0 { 67 | for k := range secret { 68 | p.Keys = append(p.Keys, k) 69 | } 70 | } 71 | 72 | for _, k := range p.Keys { 73 | v, ok := secret[k] 74 | if ok { 75 | args.LiteralSources = append(args.LiteralSources, k+"="+v) 76 | } else { 77 | log.Fatalf("error: key <%s> not present in %s\n", k, secret_file) 78 | } 79 | } 80 | 81 | return p.rf.FromSecretArgs(p.ldr, &p.GeneratorOptions, args) 82 | } 83 | -------------------------------------------------------------------------------- /kustomization.yaml: -------------------------------------------------------------------------------- 1 | --- 2 | 3 | generators: 4 | - kustomize_secrets.yaml 5 | -------------------------------------------------------------------------------- /kustomize-enable.patch: -------------------------------------------------------------------------------- 1 | diff --git a/pkg/plugins/config.go b/pkg/plugins/config.go 2 | index 80d82ecc..2f88637d 100644 3 | --- a/sigs.k8s.io/kustomize/pkg/plugins/config.go 4 | +++ b/sigs.k8s.io/kustomize/pkg/plugins/config.go 5 | @@ -49,5 +49,5 @@ func NotEnabledErr(name string) error { 6 | func AddFlagEnablePlugins(set *pflag.FlagSet, v *bool) { 7 | set.BoolVar( 8 | v, flagEnablePluginsName, 9 | - false, flagEnablePluginsHelp) 10 | + true, flagEnablePluginsHelp) 11 | } 12 | -------------------------------------------------------------------------------- /kustomize.patch: -------------------------------------------------------------------------------- 1 | diff --git a/pkg/target/kusttarget.go b/pkg/target/kusttarget.go 2 | index a26fdce6..4bbbfe35 100644 3 | --- a/sigs.k8s.io/kustomize/pkg/target/kusttarget.go 4 | +++ b/sigs.k8s.io/kustomize/pkg/target/kusttarget.go 5 | @@ -278,7 +278,10 @@ func (kt *KustTarget) runGenerators( 6 | } 7 | err = ra.AppendAll(resMap) 8 | if err != nil { 9 | - return errors.Wrapf(err, "merging from generator %v", g) 10 | + err1 := ra.AbsorbAll(resMap) 11 | + if err1 != nil { 12 | + return errors.Wrapf(err, "merging from generator %v", g) 13 | + } 14 | } 15 | } 16 | return nil 17 | diff --git a/go.mod b/go.mod 18 | index c1944f22..5aa12b64 100644 19 | --- a/sigs.k8s.io/kustomize/go.mod 20 | +++ b/sigs.k8s.io/kustomize/go.mod 21 | @@ -29,4 +29,5 @@ require ( 22 | k8s.io/klog v0.3.3 // indirect 23 | k8s.io/kube-openapi v0.0.0-20190603182131-db7b694dc208 24 | sigs.k8s.io/yaml v1.1.0 25 | + go.mozilla.org/sops 3.4.0 26 | ) 27 | -------------------------------------------------------------------------------- /kustomize_secrets.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: kustomize-sops/v1 2 | kind: SopsSecret 3 | name: my-secret 4 | namespace: bar 5 | source: secrets.enc.yaml 6 | metadata: 7 | name: not-used 8 | keys: 9 | - CAT 10 | -------------------------------------------------------------------------------- /secrets.enc.yaml: -------------------------------------------------------------------------------- 1 | CAT: ENC[AES256_GCM,data:G5cic4ApHK/a,iv:mFrUJMGQb5uhvK4gflmL8UArTttqsZKOFK4mgIxqCFs=,tag:87wAKvCyGIBYRypbRhEynw==,type:str] 2 | DOG: ENC[AES256_GCM,data:sZuFbQ==,iv:EZJQq8AyI62tixAPO2c8SHYQrpF3NxXTqK9LOEnbnXo=,tag:oZX1IYxIMbExgp4LdEP92Q==,type:str] 3 | sops: 4 | kms: [] 5 | gcp_kms: 6 | - resource_id: projects/agilicus-dev/locations/global/keyRings/sops/cryptoKeys/sops-key 7 | created_at: '2019-04-19T22:28:17Z' 8 | enc: CiQAn3WNJrIKUJZRx+M5AJ6xUUL1P7vXvJCdligtgUpk8uKZTvkSSQAcYInFUsMeQERiCaa4eg4GJMSfqc+mJ4dm0m4EHHnRXVXyzxseBahOWN5TVYvcNMCqX1AMa+zM2eZlalbJ/8NMetCnGUyyOjU= 9 | azure_kv: [] 10 | lastmodified: '2019-04-19T22:28:18Z' 11 | mac: ENC[AES256_GCM,data:U2ED0m/UL09e8g3V+Qz2WczYzCRw55POME3sjTfVTZCs3eh/Jy+ri2xJChz3RoK6VZWxBD7iBI23RzSL/AyKv8HJGDAxQVIZJdDMIdd2t86NU+Y4Z+CBKQ1LMY2u71DCNczWmwEGF2UW8xQjGwLCzddMXuKvsgv/Ea2nNbk1Bb8=,iv:oV7u0hXEgamsL7OFIfUPo+DNn+DunDTAXl8i7lHzWA4=,tag:8iFapUgIiOIqbFF1DJYzEA==,type:str] 12 | pgp: [] 13 | unencrypted_suffix: _unencrypted 14 | version: 3.3.0 15 | -------------------------------------------------------------------------------- /secrets.yaml: -------------------------------------------------------------------------------- 1 | CAT: ferocious 2 | DOG: tame 3 | --------------------------------------------------------------------------------