You are viewing documentation for Cozystack v1.1. For the latest version, see the v1.2 documentation.

Go Types

Programmatic management of Cozystack resources using Go types

Go Types

Cozystack publishes its Kubernetes resource types as a Go module, enabling management of Cozystack resources from any Go code. The types are available at pkg.go.dev/github.com/cozystack/cozystack/api/apps/v1alpha1.

Installation

Add the dependency to your Go module:

go get github.com/cozystack/cozystack/api/apps/v1alpha1@v1.2.0

Use Cases

The Go types are useful for:

  • Building custom automation tools - Create scripts or applications that programmatically deploy and manage Cozystack resources
  • Integrating with external systems - Connect Cozystack with your own CI/CD pipelines, monitoring systems, or orchestration tools
  • Validating configurations - Use the types to validate resource specifications before applying them to the cluster
  • Generating documentation - Parse and analyze existing Cozystack resources
  • Building dashboards - Create custom UIs for Cozystack management

Available Packages

The module contains packages for each resource type, you can explore it for your specific version in pkg.go.dev/github.com/cozystack/cozystack/api/apps/v1alpha1

Simple Example

For basic usage, importing a specific package is straightforward:

package main

import (
	"fmt"

	"github.com/cozystack/cozystack/api/apps/v1alpha1/vmdisk"
)

func main() {
	// Create a VMDisk source from a named image
	image := vmdisk.SourceImage{Name: "ubuntu"}
	fmt.Printf("Source: %+v\n", image)
}

Complex Example

This example demonstrates creating and marshaling several Cozystack resource types:

package main

import (
	"encoding/json"
	"fmt"

	"github.com/cozystack/cozystack/api/apps/v1alpha1/postgresql"
	"github.com/cozystack/cozystack/api/apps/v1alpha1/vminstance"
	"github.com/cozystack/cozystack/api/apps/v1alpha1/redis"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/api/resource"
)

func main() {
	// Create a PostgreSQL config with users and databases
	pgConfig := postgresql.Config{
		TypeMeta: metav1.TypeMeta{
			APIVersion: "apps.cozystack.io/v1alpha1",
			Kind:       "Postgres",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      "my-app-db",
			Namespace: "tenant-myapp",
		},
		Spec: postgresql.ConfigSpec{
			Replicas: 3,
			Size:     resource.MustParse("50Gi"),
			Version:  postgresql.Version("v18"),
			Users: map[string]postgresql.User{
				"appuser": {
					Password:   "secretpassword",
					Replication: false,
				},
				"readonly": {
					Password: "readonlypass",
				},
			},
			Databases: map[string]postgresql.Database{
				"myapp": {
					Extensions: []string{"pg_trgm", "uuid-ossp"},
					Roles: postgresql.DatabaseRoles{
						Admin:    []string{"appuser"},
						Readonly: []string{"readonly"},
					},
				},
			},
			Backup: postgresql.Backup{
				Enabled:         true,
				DestinationPath: "s3://mybackups/postgres/",
				EndpointURL:     "http://minio:9000",
				RetentionPolicy: "30d",
				S3AccessKey:     "myaccesskey",
				S3SecretKey:     "mysecretkey",
				Schedule:        "0 2 * * * *",
			},
			Quorum: postgresql.Quorum{
				MinSyncReplicas: 1,
				MaxSyncReplicas: 1,
			},
			Postgresql: postgresql.PostgreSQL{
				Parameters: postgresql.PostgreSQLParameters{
					MaxConnections: 200,
				},
			},
		},
	}

	// Marshal to JSON for kubectl apply
	pgJSON, _ := json.MarshalIndent(pgConfig, "", "  ")
	fmt.Println(string(pgJSON))

	// Create a Redis config
	redisConfig := redis.Config{
		TypeMeta: metav1.TypeMeta{
			APIVersion: "apps.cozystack.io/v1alpha1",
			Kind:       "Redis",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      "cache",
			Namespace: "tenant-myapp",
		},
		Spec: redis.ConfigSpec{
			Replicas:        2,
			Size:            resource.MustParse("5Gi"),
			Version:         redis.Version("v8"),
			AuthEnabled:     true,
			ResourcesPreset: redis.ResourcesPreset("medium"),
		},
	}

	// Create a VMInstance with disks
	vmConfig := vminstance.Config{
		TypeMeta: metav1.TypeMeta{
			APIVersion: "apps.cozystack.io/v1alpha1",
			Kind:       "VMInstance",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      "my-vm",
			Namespace: "tenant-myapp",
		},
		Spec: vminstance.ConfigSpec{
			InstanceType:    "u1.medium",
			InstanceProfile: "ubuntu",
			RunStrategy:     vminstance.RunStrategy("Always"),
			External:        true,
			ExternalMethod:  vminstance.ExternalMethod("PortList"),
			ExternalPorts:   []int{22, 80, 443},
			Resources: vminstance.Resources{
				Cpu:     resource.MustParse("2"),
				Memory:  resource.MustParse("4Gi"),
				Sockets: resource.MustParse("1"),
			},
			Disks: []vminstance.Disk{
				{Bus: "sata", Name: "rootdisk"},
				{Bus: "sata", Name: "datadisk"},
			},
			Subnets: []vminstance.Subnet{
				{Name: "default"},
			},
			SshKeys: []string{
				"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQ...",
			},
			CloudInit: `#cloud-config
packages:
  - nginx`,
		},
	}
}

Deploying Resources

After creating your resource configurations, you can deploy them using:

  1. kubectl - Marshal to YAML and apply:

    yamlData, _ := json.Marshal(yourConfig)
// Use YAML marshaling library to convert to YAML

  2. Direct Kubernetes client - Use client-go:

    import (
  "k8s.io/client-go/kubernetes"
  "k8s.io/apimachinery/pkg/runtime"
)

scheme := runtime.NewScheme()
// Register your types with the scheme

Additional Resources

Last modified 2026-04-09: Refactor docs versions to major.minor variants (fcd521c)