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support loading starlib in starlark fn
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Mengqi Yu
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Sep 8, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| diff --git a/app.yaml b/app.yaml | ||
| index b6ca925..d697d2f 100644 | ||
| --- a/app.yaml | ||
| +++ b/app.yaml | ||
| @@ -5,7 +5,7 @@ metadata: | ||
| annotations: | ||
| last-applied: '{"spec":{"replicas":3}}' | ||
| spec: | ||
| - replicas: 1 | ||
| + replicas: 4 | ||
| template: | ||
| spec: | ||
| containers: |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| .expected | ||
| results |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| apiVersion: kpt.dev/v1 | ||
| kind: Kptfile | ||
| metadata: | ||
| name: example | ||
| pipeline: | ||
| mutators: | ||
| - image: gcr.io/kpt-fn/starlark:unstable | ||
| configPath: fn-config.yaml |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| # starlark: Load Library | ||
|
|
||
| ### Overview | ||
|
|
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| In this example, we are going to demonstrate how to load a library in the | ||
| [`starlark`] function. | ||
|
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| ### Fetch the example package | ||
|
|
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| Get the example package by running the following commands: | ||
|
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| ```shell | ||
| $ kpt pkg get https://github.com/GoogleContainerTools/kpt-functions-catalog.git/examples/starlark-load-library | ||
| ``` | ||
|
|
||
| We are going to use the following `Kptfile` and `fn-config.yaml` to configure | ||
| the function: | ||
|
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| ```yaml | ||
| apiVersion: kpt.dev/v1 | ||
| kind: Kptfile | ||
| metadata: | ||
| name: example | ||
| pipeline: | ||
| mutators: | ||
| - image: gcr.io/kpt-fn/starlark:unstable | ||
| configPath: fn-config.yaml | ||
| ``` | ||
| ```yaml | ||
| # fn-config.yaml | ||
| apiVersion: fn.kpt.dev/v1alpha1 | ||
| kind: StarlarkRun | ||
| metadata: | ||
| name: set-namespace-to-prod | ||
| source: | | ||
| load('encoding/json.star', 'json') | ||
| def updateReplicas(resources): | ||
| for resource in resources: | ||
| if resource["kind"] == "Deployment": | ||
| obj = json.decode(resource["metadata"]["annotations"]["last-applied"]) | ||
| resource["spec"]["replicas"] = obj["spec"]["replicas"]+1 | ||
| updateReplicas(ctx.resource_list["items"]) | ||
| ``` | ||
| We load the json library by `load('encoding/json.star', 'json')`. Then we invoke | ||
| the `json.decode` method to deserialize the content from an annotation. | ||
|
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| ### Function invocation | ||
|
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| Invoke the function by running the following commands: | ||
|
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||
| ```shell | ||
| $ kpt fn render starlark-load-library | ||
| ``` | ||
|
|
||
| ### Expected result | ||
|
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| Check the `.spec.replicas` field should have been updated to 4. | ||
|
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||
| [`starlark`]: https://catalog.kpt.dev/starlark/v0.1/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| apiVersion: apps/v1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: my-nginx | ||
| annotations: | ||
| last-applied: '{"spec":{"replicas":3}}' | ||
| spec: | ||
| replicas: 1 | ||
| template: | ||
| spec: | ||
| containers: | ||
| - name: nginx | ||
| image: nginx:1.14.1 | ||
| ports: | ||
| - containerPort: 80 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| apiVersion: fn.kpt.dev/v1alpha1 | ||
| kind: StarlarkRun | ||
| metadata: | ||
| name: set-namespace-to-prod | ||
| source: | | ||
| load('encoding/json.star', 'json') | ||
| def updateReplicas(resources): | ||
| for resource in resources: | ||
| if resource["kind"] == "Deployment": | ||
| obj = json.decode(resource["metadata"]["annotations"]["last-applied"]) | ||
| resource["spec"]["replicas"] = obj["spec"]["replicas"]+1 | ||
| updateReplicas(ctx.resource_list["items"]) |
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54 changes: 54 additions & 0 deletions
54
functions/go/starlark/third_party/sigs.k8s.io/kustomize/kyaml/fn/runtime/starlark/loadlib.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package starlark | ||
|
|
||
| import ( | ||
| "github.com/qri-io/starlib/bsoup" | ||
| "github.com/qri-io/starlib/encoding/base64" | ||
| "github.com/qri-io/starlib/encoding/csv" | ||
| "github.com/qri-io/starlib/encoding/json" | ||
| "github.com/qri-io/starlib/encoding/yaml" | ||
| "github.com/qri-io/starlib/geo" | ||
| "github.com/qri-io/starlib/hash" | ||
| "github.com/qri-io/starlib/html" | ||
| "github.com/qri-io/starlib/http" | ||
| "github.com/qri-io/starlib/math" | ||
| "github.com/qri-io/starlib/re" | ||
| "github.com/qri-io/starlib/time" | ||
| "github.com/qri-io/starlib/xlsx" | ||
| "github.com/qri-io/starlib/zipfile" | ||
| "go.starlark.net/starlark" | ||
| ) | ||
|
|
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| // load loads starlark libraries from https://github.com/qri-io/starlib#packages. | ||
| func load(_ *starlark.Thread, module string) (starlark.StringDict, error) { | ||
| switch module { | ||
| case bsoup.ModuleName: | ||
| return bsoup.LoadModule() | ||
| case base64.ModuleName: | ||
| return base64.LoadModule() | ||
| case csv.ModuleName: | ||
| return csv.LoadModule() | ||
| case json.ModuleName: | ||
| return starlark.StringDict{"json": json.Module}, nil | ||
| case yaml.ModuleName: | ||
| return yaml.LoadModule() | ||
| case geo.ModuleName: | ||
| return geo.LoadModule() | ||
| case hash.ModuleName: | ||
| return hash.LoadModule() | ||
| case html.ModuleName: | ||
| return html.LoadModule() | ||
| case http.ModuleName: | ||
| return http.LoadModule() | ||
| case math.ModuleName: | ||
| return starlark.StringDict{"math": math.Module}, nil | ||
| case re.ModuleName: | ||
| return re.LoadModule() | ||
| case time.ModuleName: | ||
| return starlark.StringDict{"time": time.Module}, nil | ||
| case xlsx.ModuleName: | ||
| return xlsx.LoadModule() | ||
| case zipfile.ModuleName: | ||
| return zipfile.LoadModule() | ||
| } | ||
| return nil, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| 7fb55e20cd4f03912c7a77682ecaea1bd46a03a43b542908b917d21e3fe90c50 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| { | ||
| "registry-1.docker.io": { | ||
| "Seed": "tORtWHykzW3E1tslm0aGVw==" | ||
| } | ||
| } |
Empty file.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| exitCode: 0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| .expected | ||
| results |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| apiVersion: kpt.dev/v1 | ||
| kind: Kptfile | ||
| metadata: | ||
| name: example | ||
| pipeline: | ||
| mutators: | ||
| - image: gcr.io/kpt-fn/starlark:unstable | ||
| configPath: fn-config.yaml |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| apiVersion: apps/v1 | ||
| kind: ConfigMap | ||
| metadata: | ||
| name: my-nginx | ||
| data: | ||
| foo: bar |
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