Shell-operator and addon-operator progress: hooks like admission webhooks, Helm 3, OpenAPI, Go hooks and much more

Shell-operator addon-operator — Open Source- «» Kubernetes, 2019 . K8s-: ( Bash, Python ..) , Kubernetes API. (addon-operator) — « », — Helm- , shell-operator’.

shell-operator v1.0.0-beta.11 ( ), KubeCon EU’2020, , . ( , - , shell-operator , .)

shell-operator, addon-operator , .

shell-operator v1.0.0-rc1

shell-operator ValidatingWebhookConfiguration



— admission webhook. .. Kubernetes , - . : « repo.example.com». 204-validating-webhook. Shell-operator Kubernetes 1.16.

, ( shell- ):

function __config__(){
    cat <<EOF
configVersion: v1
kubernetesValidating:
- name: private-repo-policy.example.com
  namespace:
    labelSelector:
      matchLabels:
        # helm adds a 'name' label to a namespace it creates
        name: example-204
  rules:
  - apiGroups:   ["stable.example.com"]
    apiVersions: ["v1"]
    operations:  ["CREATE", "UPDATE"]
    resources:   ["crontabs"]
    scope:       "Namespaced"
EOF
}
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

— , action



:

{"group":"group_name_1", "action":"expire"}
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

, , . .

shell-operator :

1.

• . API-, .

  
  
  
  
  

  

• .

  
  
  
  
  

• read-only- , .

  
  
  
  
  

• (. shell_operator_hook_run_sys_cpu_seconds
  
  
  
  METRICS).

  
  
  
  
  

2.

• flant/shell-operator
  
  
  
  — AMD64, ARM ARM64 ( Raspberry Pi!).

  
  
  
  
  

• shell-operator
  
  
  
  Linux-.

  
  
  
  
  

• flant/shell-operator
  
  
  
  Bash, kubectl jq Alpine. , , Dockerfile .

  
  
  
  
  

• .git
  
  
  
  , .

  
  
  
  
  

• : Alpine 3.12, kubectl 1.19.4, Go 1.15.

  
  
  
  
  

• jq , libjq*, jq-1.6 (#206).

  
  
  
  
  

* , libjq-go — Open Source-, CGO bindings jq. shell-operator, — Xbus. enterprise-, NATS. , Open Source , .

3.

• (+x).

  
  
  
  
  

• CGO. shell-operator , jqFilter
  
  
  
  .

  
  
  
  
  

• shell_lib.sh
  
  
  
  , shell framework . KubeCon.

  
  
  
  
  

addon-operator

addon-operator , - .

— OpenAPI values. values, Helm, config values, ConfigMap .

, values (project



clusterName



), ( clusterHostname



discovery



):

# /global/openapi/config-values.yaml

type: object
additionalProperties: false
required:
  - project
  - clusterName
minProperties: 2
properties:
  project:
    type: string
  clusterName:
    type: string
  clusterHostname:
    type: string
  discovery:
    type: object
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

— . .

— Go. addon-operator, . 700-go-hooks.

Go :

package global_hooks

import "github.com/flant/addon-operator/sdk"

var _ = sdk.Register(&GoHook{})

type GoHook struct {
	sdk.CommonGoHook
}

func (h *GoHook) Metadata() sdk.HookMetadata {
	return h.CommonMetadataFromRuntime()
}

func (h *GoHook) Config() *sdk.HookConfig {
	return h.CommonGoHook.Config(&sdk.HookConfig{
		YamlConfig: `
configVersion: v1
onStartup: 10
`,
		MainHandler: h.Main,
	})
}

func (h *GoHook) Main(input *sdk.BindingInput) (*sdk.BindingOutput, error) {
	input.LogEntry.Infof("Start Global Go hook")
	return nil, nil
}
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

SDK - , — , — Tg- @kubeoperator.

addon-operator :

• Helm 3.

  
  
  
  
  

• «» « » — . endpoint readiness-: Pod addon-operator’ Ready, , .. « » .

  
  
  
  
  

• , ( enabled- ).

  
  
  
  
  

• Synchronization Kubernetes- , .

  
  
  
  
  

• shell-operator’: Alpine , , ..

  
  
  
  
  

• — METRICS.

  
  
  
  
  

addon-operator shell-operator, . OpenAPI, v1.0.0-rc1.

shell-operator

shell-operator , . :

• Confluent Kafka DevOps. « production-, streaming-, Apache Kafka Confluent Cloud». Kubernetes, . , (Confluent Cloud Operator Kafka Connect Operator) shell-operator. , , Kafka DevOps.

  
  
  
  
  

• edukates shell-operator, ( ).

  
  
  
  
  

• Docker Captain DNS- pod’ Traefik. shell-operator .

  
  
  
  
  

• Solution Architect Red Hat r53-operator — « », Ingress AWS Route 53.

  
  
  
  
  

shell-operator, GitHub Discussions : , . addon-operator — , .

Shell-operator addon-operator . , . shell-operator — conversion webhook « », .. kubectl , shell-operator (. #94, #239).

beta, rc1, shell-operator v1.0.0.

P.S. shell-operator 1000 GitHub, addon-operator — 250. , !

P.P.S.

:

• «Go? Bash! shell-operator ( KubeCon EU'2020)»;

  
  
  
  
  

• « Kubernetes- shell-operator: »;

  
  
  
  
  

• « Kubernetes- ? addon-operator»;

  
  
  
  
  

• « Kubernetes ( )»;

  
  
  
  
  

• « shell-operator: Kubernetes »;