A Helm3 HTTP Wrapper With Go SDK

• 中文文档

helm-wrapper is a helm3 HTTP wrapper with helm Go SDK. With helm-wrapper, you can use HTTP RESTFul API do something like helm commondline (install/uninstall/upgrade/get/list/rollback...).

Support API

• If there are some APIs (release related) need to support multiple clusters,you can use the parameters below

Params	Description
kube_context	Support distinguish multiple clusters by thekube_context
kube_config	Support distinguish multiple clusters by thekube_config

• helm install
  • POST
  • /api/namespaces/:namespace/releases/:release?chart=<chartName>

POST Body:

{
    "dry_run": false,           // `--dry-run`
    "disable_hooks": false,     // `--no-hooks`
    "wait": false,              // `--wait`
    "timeout": "5m0s",          // `--timeout`
    "devel": false,             // `--false`
    "description": "",          // `--description`
    "atomic": false,            // `--atomic`
    "skip_crds": false,         // `--skip-crds`
    "sub_notes": false,         // `--render-subchart-notes`
    "create_namespace": false,  // `--create-namespace`
    "dependency_update": false, // `--dependency-update`
    "values": "",               // `--values`
    "set": [],                  // `--set`
    "set_string": [],           // `--set-string`
    "ca_file": "",              // `--ca-file`
    "cert_file": "",            // `--cert-file`
    "key_file": "",             // `--key-file`
    "insecure_skip_verify": false, // `--insecure-skip-verify`
    "keyring": "",              // `--keyring`
    "password": "",             // `--password`
    "repo": "",                 // `--repo`
    "username": "",             // `--username`
    "verify": false,            // `--verify`
    "version": ""               // `--version`
}

"values" -> helm install --values option

• helm uninstall

  • DELETE
  • /api/namespaces/:namespace/releases/:release

• helm upgrade

  • PUT
  • /api/namespaces/:namespace/releases/:release?chart=<chartName>

PUT Body:

{
    "dry_run": false,           // `--dry-run`
    "disable_hooks": false,     // `--no-hooks`
    "wait": false,              // `--wait`
    "timeout": "5m0s",          // `--timeout`
    "devel": false,             // `--false`
    "description": "",          // `--description`
    "atomic": false,            // `--atomic`
    "skip_crds": false,         // `--skip-crds`
    "sub_notes": false,         // `--render-subchart-notes`
    "force": false,             // `--force`
    "install": false,           // `--install`
    "recreate": false,          // `--recreate`
    "reuse_values": false,      // `--reuse-values`
    "cleanup_on_fail": false,   // `--cleanup-on-fail`
    "values": "",               // `--values`
    "set": [],                  // `--set`
    "set_string": [],           // `--set-string`
    "ca_file": "",              // `--ca-file`
    "cert_file": "",            // `--cert-file`
    "key_file": "",             // `--key-file`
    "insecure_skip_verify": false, // `--insecure-skip-verify`
    "keyring": "",              // `--keyring`
    "password": "",             // `--password`
    "repo": "",                 // `--repo`
    "username": "",             // `--username`
    "verify": false,            // `--verify`
    "version": ""               // `--version`
}

"values" -> helm install --values option

• helm rollback
  • PUT
  • /api/namespaces/:namespace/releases/:release/versions/:reversion

PUT Body (optional):

{
    "dry_run": false,           // `--dry-run`
    "disable_hooks": false,     // `--no-hooks`
    "wait": false,              // `--wait`
    "timeout": "5m0s",          // `--timeout`
    "force": false,             // `--force`
    "recreate": false,          // `--recreate`
    "cleanup_on_fail": false,   // `--cleanup-on-fail`
    "history_max":              // `--history-max` int
}

• helm list
  • GET
  • /api/namespaces/:namespace/releases

Params	Helm list equivalent	Default
all	--all	false
all_namespaces	--all-namespaces	false
by_date	--date	false
sort_reverse	--reverse	false
limit	--max	no limit
offset	--offset	no offset
filter	--filter	""
uninstalled	--uninstalled	false
uninstalling	--uninstalling	false
superseded	--superseded	false
failed	--failed	false
deployed	--deployed	false
pending	--pending	false

• helm get
  • GET
  • /api/namespaces/:namespace/releases/:release

Params	Description
info	support hooks/manifest/notes/values, default values
output	get values output format (only info==values), support json/yaml, default json

• helm release history

  • GET
  • /api/namespaces/:namespace/releases/:release/histories

• helm show

  • GET
  • /api/charts

Params	Description
chart	chart name, required
info	support all/readme/values/chart, default all
version	--version

• helm search repo
  • GET
  • /api/repositories/charts

Params	Description
keyword	search keyword，required
version	chart version
versions	if "true", all versions

• helm repo list

  • GET
  • /api/repositories

• helm repo update

  • PUT
  • /api/repositories

• helm env

  • GET
  • /api/envs

• upload chart

  • POST
  • /api/charts/upload

Params	Description
chart	upload chart file, with suffix .tgz

• list local charts

  • GET
  • /api/charts/upload

• helm version

  • GET
  • /api/version

Response Body:

{
"code": 0,
    "data": {
        "version": "v3.6",
        "go_version": "go1.17.7"
    }
}

Notes: helm-wrapper is Alpha status, no more test

Response

type respBody struct {
    Code  int         `json:"code"` // 0 or 1, 0 is ok, 1 is error
    Data  interface{} `json:"data,omitempty"`
    Error string      `json:"error,omitempty"`
}

Build & Run

Build

make build
make build-linux    // build helm-wrapper Linux binary
docker build -t helm-wrapper .   // build docker image with helm-wrapper

helm-wrapper help

$ helm-wrapper -h
Usage of helm-wrapper:
      --addr string                      server listen addr (default "0.0.0.0")
      --alsologtostderr                  log to standard error as well as files
      --config string                    helm wrapper config (default "config.yaml")
      --debug                            enable verbose output
      --kube-context string              name of the kubeconfig context to use
      --kubeconfig string                path to the kubeconfig file
      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
      --log_dir string                   If non-empty, write log files in this directory
      --logtostderr                      log to standard error instead of files (default true)
  -n, --namespace string                 namespace scope for this request
      --port string                      server listen port (default "8080")
      --registry-config string           path to the registry config file (default "/root/.config/helm/registry.json")
      --repository-cache string          path to the file containing cached repository indexes (default "/root/.cache/helm/repository")
      --repository-config string         path to the file containing repository names and URLs (default "/root/.config/helm/repositories.yaml")
      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
  -v, --v Level                          log level for V logs
      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
pflag: help requested

• --config helm-wrapper configuration:

$ cat config-example.yaml
uploadPath: /tmp/charts
helmRepos:
  - name: bitnami
    url: https://charts.bitnami.com/bitnami

• --kubeconfig default kubeconfig path is ~/.kube/config.About kubeconfig, you can see Configure Access to Multiple Clusters.

Run

$ ./helm-wrapper --config </path/to/config.yaml> --kubeconfig </path/to/kubeconfig>

Deploy in Kubernetes Cluster

replace deployment/deployment.yaml with helm-wrapper image, then:

kubectl create -f ./deployment 

Noets: with deployment/rbac.yaml, you not need --kubeconfig