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Helm SDK doc section and examples
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--- | ||
title: "Community" | ||
weight: 7 | ||
weight: 8 | ||
--- | ||
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# Community Guides | ||
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--- | ||
title: "Frequently Asked Questions" | ||
weight: 8 | ||
weight: 9 | ||
aliases: [ | ||
"/docs/topics/faq/", | ||
"/docs/faq/" | ||
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--- | ||
title: "Go SDK" | ||
weight: 7 | ||
--- |
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--- | ||
title: "Examples" | ||
description: "Examples various features if the Helm SDK" | ||
weight: 2 | ||
--- | ||
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This document runs though a series of examples of using the Helm SDK. | ||
Intended to document various SDK functionalities. | ||
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The final example shows `main.go` driver ([link](#driver)). That runs the below actions and includes necessary helper functions. | ||
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The code for the examples lives in the [helm/helm-www/sdkexamples/](https://github.com/helm/helm-www/sdkexamples) directory. | ||
And is intended to be fully functional. | ||
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## Actions | ||
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### Install Action | ||
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This example installs the given chart/release, for the given version and values: | ||
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{{< highlightexamplego file="sdkexamples/install.go" >}} | ||
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### Upgrade Action | ||
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This example upgrades the given release, with the given chart, version and values: | ||
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{{< highlightexamplego file="sdkexamples/upgrade.go" >}} | ||
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### Uninstall Action | ||
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This example uninstalls the given release | ||
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{{< highlightexamplego file="sdkexamples/uninstall.go" >}} | ||
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### List Action | ||
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This example lists all released charts (in the currently configured namespace) | ||
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{{< highlightexamplego file="sdkexamples/list.go" >}} | ||
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### Pull Action | ||
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This example pulls a chart from an OCI repository | ||
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{{< highlightexamplego file="sdkexamples/pull.go" >}} | ||
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## Driver | ||
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The driver here shows the necessary auxillary functions needed for the Helm SDK actions to function. And shows the above examples in action, to pull, install, update, and uninstall the 'podinfo' chart from an OCI repository. | ||
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{{< highlightexamplego file="sdkexamples/main.go" >}} |
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--- | ||
title: "Introduction" | ||
description: "Introduces the Helm Go SDK" | ||
aliases: ["/docs/gosdk"] | ||
weight: 1 | ||
--- | ||
Helm's Go SDK enables custom software to leverage Helm charts and Helm's functionality for managing Kubernetes software deployment | ||
(In fact, the Helm CLI is effectively just one such tool!) | ||
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Currently, the SDK has been functionally separated from the Helm CLI. | ||
And the SDK can (and is) used by standalone tooling. | ||
The Helm project has committed to API stability for the SDK. | ||
As a warning, the SDK has some rough edges remaining from the initial work to separate the CLI and the SDK. Which the Helm project aims to improve and over time. | ||
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Full API documentation can be found at [https://pkg.go.dev/helm.sh/helm/v3](https://pkg.go.dev/helm.sh/helm/v3). | ||
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A brief overview of some of the main types of packages and a simple example follows below. | ||
See the [Examples](./examples.md) section for more examples and a more full featured 'driver'. | ||
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## Main package overview | ||
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- [pkg/action](https://pkg.go.dev/helm.sh/helm/v3/pkg/action): | ||
Contains the main “client” for performing Helm actions. | ||
This is the same package that the CLI is using underneath the hood. | ||
If you just need to perform basic Helm commands from another Go program, this package is for you | ||
- [pkg/chart](https://pkg.go.dev/helm.sh/helm/v3/pkg/chart), [pkg/chartutil](https://pkg.go.dev/helm.sh/helm/v3/pkg/chartutil): | ||
Methods and helpers used for loading and manipulating charts | ||
- [pkg/chart](https://pkg.go.dev/helm.sh/helm/v3/pkg/cli) and its subpackages: | ||
Contains all the handlers for the standard Helm environment variables and its subpackages contain output and values file handling | ||
- [pkg/release](https://pkg.go.dev/helm.sh/helm/v3/pkg/release): | ||
Defines the `Release` object and statuses | ||
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There are many more packages besides these, so go check out the documentation for more information! | ||
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### Simple example | ||
This is a simple example of doing a `helm list` using the Go SDK. | ||
See the [Examples](./examples.md) section for more full featured examples. | ||
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```go | ||
package main | ||
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import ( | ||
"log" | ||
"os" | ||
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"helm.sh/helm/v3/pkg/action" | ||
"helm.sh/helm/v3/pkg/cli" | ||
) | ||
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func main() { | ||
settings := cli.New() | ||
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actionConfig := new(action.Configuration) | ||
// You can pass an empty string instead of settings.Namespace() to list | ||
// all namespaces | ||
if err := actionConfig.Init(settings.RESTClientGetter(), settings.Namespace(), os.Getenv("HELM_DRIVER"), log.Printf); err != nil { | ||
log.Printf("%+v", err) | ||
os.Exit(1) | ||
} | ||
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client := action.NewList(actionConfig) | ||
// Only list deployed | ||
client.Deployed = true | ||
results, err := client.Run() | ||
if err != nil { | ||
log.Printf("%+v", err) | ||
os.Exit(1) | ||
} | ||
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for _, rel := range results { | ||
log.Printf("%+v", rel) | ||
} | ||
} | ||
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``` | ||
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## Compatibility | ||
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The Helm SDK explicitly follows the Helm backwards compatibility guarantees: | ||
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<https://github.com/helm/community/blob/main/hips/hip-0004.md> | ||
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That is, break changes will only be made over major versions. |
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{{- transform.Highlight (os.ReadFile (.Get "file")) "go" }} |
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# Helm Go SDK examples | ||
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This directory implements various Go SDK examples and a "driver". | ||
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These examples are fully working, and can be run by: | ||
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``` | ||
# cd helm-www/sdkexamples | ||
$ go run ./... | ||
``` |
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module github.com/helm/helm-www/sdkexamples | ||
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go 1.21.5 | ||
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require ( | ||
github.com/pkg/errors v0.9.1 | ||
helm.sh/helm v2.17.0+incompatible | ||
helm.sh/helm/v3 v3.13.3 | ||
) | ||
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require ( | ||
github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24 // indirect | ||
github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect | ||
github.com/BurntSushi/toml v1.3.2 // indirect | ||
github.com/MakeNowJust/heredoc v1.0.0 // indirect | ||
github.com/Masterminds/goutils v1.1.1 // indirect | ||
github.com/Masterminds/semver v1.5.0 // indirect | ||
github.com/Masterminds/semver/v3 v3.2.1 // indirect | ||
github.com/Masterminds/sprig/v3 v3.2.3 // indirect | ||
github.com/Masterminds/squirrel v1.5.4 // indirect | ||
github.com/Microsoft/hcsshim v0.11.0 // indirect | ||
github.com/asaskevich/govalidator v0.0.0-20200428143746-21a406dcc535 // indirect | ||
github.com/beorn7/perks v1.0.1 // indirect | ||
github.com/cespare/xxhash/v2 v2.2.0 // indirect | ||
github.com/chai2010/gettext-go v1.0.2 // indirect | ||
github.com/containerd/containerd v1.7.6 // indirect | ||
github.com/cyphar/filepath-securejoin v0.2.4 // indirect | ||
github.com/davecgh/go-spew v1.1.1 // indirect | ||
github.com/docker/cli v24.0.6+incompatible // indirect | ||
github.com/docker/distribution v2.8.2+incompatible // indirect | ||
github.com/docker/docker v24.0.7+incompatible // indirect | ||
github.com/docker/docker-credential-helpers v0.7.0 // indirect | ||
github.com/docker/go-connections v0.4.0 // indirect | ||
github.com/docker/go-metrics v0.0.1 // indirect | ||
github.com/docker/go-units v0.5.0 // indirect | ||
github.com/emicklei/go-restful/v3 v3.10.1 // indirect | ||
github.com/evanphx/json-patch v5.6.0+incompatible // indirect | ||
github.com/exponent-io/jsonpath v0.0.0-20151013193312-d6023ce2651d // indirect | ||
github.com/fatih/color v1.13.0 // indirect | ||
github.com/ghodss/yaml v1.0.0 // indirect | ||
github.com/go-errors/errors v1.4.2 // indirect | ||
github.com/go-gorp/gorp/v3 v3.1.0 // indirect | ||
github.com/go-logr/logr v1.2.4 // indirect | ||
github.com/go-logr/stdr v1.2.2 // indirect | ||
github.com/go-openapi/jsonpointer v0.19.6 // indirect | ||
github.com/go-openapi/jsonreference v0.20.2 // indirect | ||
github.com/go-openapi/swag v0.22.3 // indirect | ||
github.com/gobwas/glob v0.2.3 // indirect | ||
github.com/gogo/protobuf v1.3.2 // indirect | ||
github.com/golang/protobuf v1.5.3 // indirect | ||
github.com/google/btree v1.0.1 // indirect | ||
github.com/google/gnostic-models v0.6.8 // indirect | ||
github.com/google/go-cmp v0.5.9 // indirect | ||
github.com/google/gofuzz v1.2.0 // indirect | ||
github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect | ||
github.com/google/uuid v1.3.0 // indirect | ||
github.com/gorilla/mux v1.8.0 // indirect | ||
github.com/gosuri/uitable v0.0.4 // indirect | ||
github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7 // indirect | ||
github.com/hashicorp/errwrap v1.1.0 // indirect | ||
github.com/hashicorp/go-multierror v1.1.1 // indirect | ||
github.com/huandu/xstrings v1.4.0 // indirect | ||
github.com/imdario/mergo v0.3.13 // indirect | ||
github.com/inconshreveable/mousetrap v1.1.0 // indirect | ||
github.com/jmoiron/sqlx v1.3.5 // indirect | ||
github.com/josharian/intern v1.0.0 // indirect | ||
github.com/json-iterator/go v1.1.12 // indirect | ||
github.com/klauspost/compress v1.16.0 // indirect | ||
github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect | ||
github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect | ||
github.com/lib/pq v1.10.9 // indirect | ||
github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect | ||
github.com/mailru/easyjson v0.7.7 // indirect | ||
github.com/mattn/go-colorable v0.1.13 // indirect | ||
github.com/mattn/go-isatty v0.0.17 // indirect | ||
github.com/mattn/go-runewidth v0.0.9 // indirect | ||
github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect | ||
github.com/mitchellh/copystructure v1.2.0 // indirect | ||
github.com/mitchellh/go-wordwrap v1.0.1 // indirect | ||
github.com/mitchellh/reflectwalk v1.0.2 // indirect | ||
github.com/moby/locker v1.0.1 // indirect | ||
github.com/moby/spdystream v0.2.0 // indirect | ||
github.com/moby/term v0.5.0 // 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/morikuni/aec v1.0.0 // indirect | ||
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect | ||
github.com/opencontainers/go-digest v1.0.0 // indirect | ||
github.com/opencontainers/image-spec v1.1.0-rc5 // indirect | ||
github.com/peterbourgon/diskv v2.0.1+incompatible // indirect | ||
github.com/prometheus/client_golang v1.16.0 // indirect | ||
github.com/prometheus/client_model v0.4.0 // indirect | ||
github.com/prometheus/common v0.44.0 // indirect | ||
github.com/prometheus/procfs v0.10.1 // indirect | ||
github.com/rubenv/sql-migrate v1.5.2 // indirect | ||
github.com/russross/blackfriday/v2 v2.1.0 // indirect | ||
github.com/shopspring/decimal v1.3.1 // indirect | ||
github.com/sirupsen/logrus v1.9.3 // indirect | ||
github.com/spf13/cast v1.5.0 // indirect | ||
github.com/spf13/cobra v1.7.0 // indirect | ||
github.com/spf13/pflag v1.0.5 // indirect | ||
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect | ||
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect | ||
github.com/xeipuuv/gojsonschema v1.2.0 // indirect | ||
github.com/xlab/treeprint v1.2.0 // indirect | ||
go.opentelemetry.io/otel v1.14.0 // indirect | ||
go.opentelemetry.io/otel/trace v1.14.0 // indirect | ||
go.starlark.net v0.0.0-20230525235612-a134d8f9ddca // indirect | ||
golang.org/x/crypto v0.14.0 // indirect | ||
golang.org/x/net v0.17.0 // indirect | ||
golang.org/x/oauth2 v0.8.0 // indirect | ||
golang.org/x/sync v0.3.0 // indirect | ||
golang.org/x/sys v0.13.0 // indirect | ||
golang.org/x/term v0.13.0 // indirect | ||
golang.org/x/text v0.13.0 // indirect | ||
golang.org/x/time v0.3.0 // indirect | ||
golang.org/x/tools v0.12.1-0.20230825192346-2191a27a6dc5 // indirect | ||
google.golang.org/appengine v1.6.7 // indirect | ||
google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 // indirect | ||
google.golang.org/grpc v1.56.3 // indirect | ||
google.golang.org/protobuf v1.31.0 // indirect | ||
gopkg.in/inf.v0 v0.9.1 // indirect | ||
gopkg.in/yaml.v2 v2.4.0 // indirect | ||
gopkg.in/yaml.v3 v3.0.1 // indirect | ||
k8s.io/api v0.28.4 // indirect | ||
k8s.io/apiextensions-apiserver v0.28.4 // indirect | ||
k8s.io/apimachinery v0.28.4 // indirect | ||
k8s.io/apiserver v0.28.4 // indirect | ||
k8s.io/cli-runtime v0.28.4 // indirect | ||
k8s.io/client-go v0.28.4 // indirect | ||
k8s.io/component-base v0.28.4 // indirect | ||
k8s.io/helm v2.17.0+incompatible // indirect | ||
k8s.io/klog/v2 v2.100.1 // indirect | ||
k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 // indirect | ||
k8s.io/kubectl v0.28.4 // indirect | ||
k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 // indirect | ||
oras.land/oras-go v1.2.4 // indirect | ||
sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect | ||
sigs.k8s.io/kustomize/api v0.13.5-0.20230601165947-6ce0bf390ce3 // indirect | ||
sigs.k8s.io/kustomize/kyaml v0.14.3-0.20230601165947-6ce0bf390ce3 // indirect | ||
sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect | ||
sigs.k8s.io/yaml v1.3.0 // indirect | ||
) |
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