Pulumi & Kubernetes: Modify program
Now that we have an instance of our Pulumi program deployed, let’s update it to do something a little more interesting.
Replace the entire contents of index.jsindex.ts__main__.pymain.goProgram.csProgram.fsProgram.vbApp.javaPulumi.yaml
"use strict";
const pulumi = require("@pulumi/pulumi");
const k8s = require("@pulumi/kubernetes");
// Minikube does not implement services of type `LoadBalancer`; require the user to specify if we're
// running on minikube, and if so, create only services of type ClusterIP.
const config = new pulumi.Config();
const isMinikube = config.requireBoolean("isMinikube");
const appName = "nginx";
const appLabels = { app: appName };
const deployment = new k8s.apps.v1.Deployment(appName, {
spec: {
selector: { matchLabels: appLabels },
replicas: 1,
template: {
metadata: { labels: appLabels },
spec: { containers: [{ name: appName, image: "nginx" }] }
}
}
});
// Allocate an IP to the Deployment.
const frontend = new k8s.core.v1.Service(appName, {
metadata: { labels: deployment.spec.template.metadata.labels },
spec: {
type: isMinikube ? "ClusterIP" : "LoadBalancer",
ports: [{ port: 80, targetPort: 80, protocol: "TCP" }],
selector: appLabels
}
});
// When "done", this will print the public IP.
exports.ip = isMinikube
? frontend.spec.clusterIP
: frontend.status.loadBalancer.apply(
(lb) => lb.ingress[0].ip || lb.ingress[0].hostname
);
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Minikube does not implement services of type `LoadBalancer`; require the user to specify if we're
// running on minikube, and if so, create only services of type ClusterIP.
const config = new pulumi.Config();
const isMinikube = config.requireBoolean("isMinikube");
const appName = "nginx";
const appLabels = { app: appName };
const deployment = new k8s.apps.v1.Deployment(appName, {
spec: {
selector: { matchLabels: appLabels },
replicas: 1,
template: {
metadata: { labels: appLabels },
spec: { containers: [{ name: appName, image: "nginx" }] }
}
}
});
// Allocate an IP to the Deployment.
const frontend = new k8s.core.v1.Service(appName, {
metadata: { labels: deployment.spec.template.metadata.labels },
spec: {
type: isMinikube ? "ClusterIP" : "LoadBalancer",
ports: [{ port: 80, targetPort: 80, protocol: "TCP" }],
selector: appLabels
}
});
// When "done", this will print the public IP.
export const ip = isMinikube
? frontend.spec.clusterIP
: frontend.status.loadBalancer.apply(
(lb) => lb.ingress[0].ip || lb.ingress[0].hostname
);
"""
Creating a Kubernetes Deployment
"""
import pulumi
from pulumi_kubernetes.apps.v1 import Deployment
from pulumi_kubernetes.core.v1 import Service
# Minikube does not implement services of type `LoadBalancer`; require the user to specify if we're
# running on minikube, and if so, create only services of type ClusterIP.
config = pulumi.Config()
is_minikube = config.require_bool("isMinikube")
app_name = "nginx"
app_labels = { "app": app_name }
deployment = Deployment(
app_name,
spec={
"selector": { "match_labels": app_labels },
"replicas": 1,
"template": {
"metadata": { "labels": app_labels },
"spec": { "containers": [{ "name": app_name, "image": "nginx" }] }
}
})
# Allocate an IP to the Deployment.
frontend = Service(
app_name,
metadata={
"labels": deployment.spec["template"]["metadata"]["labels"],
},
spec={
"type": "ClusterIP" if is_minikube else "LoadBalancer",
"ports": [{ "port": 80, "target_port": 80, "protocol": "TCP" }],
"selector": app_labels,
})
# When "done", this will print the public IP.
result = None
if is_minikube:
result = frontend.spec.apply(lambda v: v["cluster_ip"] if "cluster_ip" in v else None)
else:
ingress = frontend.status.load_balancer.apply(lambda v: v["ingress"][0] if "ingress" in v else "output<string>")
result = ingress.apply(lambda v: v["ip"] if v and "ip" in v else (v["hostname"] if v and "hostname" in v else "output<string>"))
pulumi.export("ip", result)
package main
import (
appsv1 "github.com/pulumi/pulumi-kubernetes/sdk/v4/go/kubernetes/apps/v1"
corev1 "github.com/pulumi/pulumi-kubernetes/sdk/v4/go/kubernetes/core/v1"
metav1 "github.com/pulumi/pulumi-kubernetes/sdk/v4/go/kubernetes/meta/v1"
"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
"github.com/pulumi/pulumi/sdk/v3/go/pulumi/config"
)
func main() {
pulumi.Run(func(ctx *pulumi.Context) error {
isMinikube := config.GetBool(ctx, "isMinikube")
appName := "nginx"
appLabels := pulumi.StringMap{
"app": pulumi.String(appName),
}
deployment, err := appsv1.NewDeployment(ctx, appName, &appsv1.DeploymentArgs{
Spec: appsv1.DeploymentSpecArgs{
Selector: &metav1.LabelSelectorArgs{
MatchLabels: appLabels,
},
Replicas: pulumi.Int(1),
Template: &corev1.PodTemplateSpecArgs{
Metadata: &metav1.ObjectMetaArgs{
Labels: appLabels,
},
Spec: &corev1.PodSpecArgs{
Containers: corev1.ContainerArray{
corev1.ContainerArgs{
Name: pulumi.String("nginx"),
Image: pulumi.String("nginx"),
}},
},
},
},
})
if err != nil {
return err
}
feType := "LoadBalancer"
if isMinikube {
feType = "ClusterIP"
}
template := deployment.Spec.ApplyT(func(v appsv1.DeploymentSpec) *corev1.PodTemplateSpec {
return &v.Template
}).(corev1.PodTemplateSpecPtrOutput)
meta := template.ApplyT(func(v *corev1.PodTemplateSpec) *metav1.ObjectMeta { return v.Metadata }).(metav1.ObjectMetaPtrOutput)
frontend, _ := corev1.NewService(ctx, appName, &corev1.ServiceArgs{
Metadata: meta,
Spec: &corev1.ServiceSpecArgs{
Type: pulumi.String(feType),
Ports: &corev1.ServicePortArray{
&corev1.ServicePortArgs{
Port: pulumi.Int(80),
TargetPort: pulumi.Int(80),
Protocol: pulumi.String("TCP"),
},
},
Selector: appLabels,
},
})
var ip pulumi.StringOutput
if isMinikube {
ip = frontend.Spec.ApplyT(func(val corev1.ServiceSpec) string {
if val.ClusterIP != nil {
return *val.ClusterIP
}
return ""
}).(pulumi.StringOutput)
} else {
ip = frontend.Status.ApplyT(func(val *corev1.ServiceStatus) string {
if val.LoadBalancer.Ingress != nil && len(val.LoadBalancer.Ingress) > 0 {
ingress := val.LoadBalancer.Ingress[0]
if ingress.Ip != nil {
return *ingress.Ip
}
if ingress.Hostname != nil {
return *ingress.Hostname
}
}
return ""
}).(pulumi.StringOutput)
}
ctx.Export("ip", ip)
return nil
})
}
Add missing go module requirements:
$ go mod tidy
using Pulumi;
using Pulumi.Kubernetes.Core.V1;
using Pulumi.Kubernetes.Types.Inputs.Core.V1;
using Pulumi.Kubernetes.Types.Inputs.Apps.V1;
using Pulumi.Kubernetes.Types.Inputs.Meta.V1;
using System.Collections.Generic;
return await Deployment.RunAsync(() =>
{
var config = new Pulumi.Config();
var isMinikube = config.GetBoolean("isMinikube") ?? false;
var appName = "nginx";
var appLabels = new InputMap<string>
{
{ "app", appName },
};
var deployment = new Pulumi.Kubernetes.Apps.V1.Deployment(appName, new DeploymentArgs
{
Spec = new DeploymentSpecArgs
{
Selector = new LabelSelectorArgs
{
MatchLabels = appLabels,
},
Replicas = 1,
Template = new PodTemplateSpecArgs
{
Metadata = new ObjectMetaArgs
{
Labels = appLabels,
},
Spec = new PodSpecArgs
{
Containers =
{
new ContainerArgs
{
Name = appName,
Image = "nginx",
Ports =
{
new ContainerPortArgs
{
ContainerPortValue = 80
},
},
},
},
},
},
},
});
var frontend = new Service(appName, new ServiceArgs
{
Metadata = new ObjectMetaArgs
{
Labels = deployment.Spec.Apply(spec =>
spec.Template.Metadata.Labels
),
},
Spec = new ServiceSpecArgs
{
Type = isMinikube
? "ClusterIP"
: "LoadBalancer",
Selector = appLabels,
Ports = new ServicePortArgs
{
Port = 80,
TargetPort = 80,
Protocol = "TCP",
},
}
});
var ip = isMinikube
? frontend.Spec.Apply(spec => spec.ClusterIP)
: frontend.Status.Apply(status =>
{
var ingress = status.LoadBalancer.Ingress[0];
return ingress.Ip ?? ingress.Hostname;
});
return new Dictionary<string, object?>
{
["ip"] = ip
};
});
package myproject;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.kubernetes.apps_v1.Deployment;
import com.pulumi.kubernetes.apps_v1.DeploymentArgs;
import com.pulumi.kubernetes.apps_v1.inputs.DeploymentSpecArgs;
import com.pulumi.kubernetes.core_v1.*;
import com.pulumi.kubernetes.core_v1.ServiceArgs;
import com.pulumi.kubernetes.core_v1.enums.ServiceSpecType;
import com.pulumi.kubernetes.core_v1.inputs.*;
import com.pulumi.kubernetes.meta_v1.inputs.LabelSelectorArgs;
import com.pulumi.kubernetes.meta_v1.inputs.ObjectMetaArgs;
import java.util.Map;
public class App {
public static void main(String[] args) {
Pulumi.run(ctx -> {
var config = ctx.config();
var isMinikube = config.requireBoolean("isMinikube");
var labels = Map.of("app", "nginx");
var deployment = new Deployment("nginx", DeploymentArgs.builder()
.spec(DeploymentSpecArgs.builder()
.selector(LabelSelectorArgs.builder()
.matchLabels(labels)
.build())
.replicas(1)
.template(PodTemplateSpecArgs.builder()
.metadata(ObjectMetaArgs.builder()
.labels(labels)
.build())
.spec(PodSpecArgs.builder()
.containers(ContainerArgs.builder()
.name("nginx")
.image("nginx")
.ports(ContainerPortArgs.builder()
.containerPort(80)
.build())
.build())
.build())
.build())
.build())
.build());
var name = deployment.metadata()
.applyValue(m -> m.orElseThrow().name().orElse(""));
var frontend = new Service("nginx", ServiceArgs.builder()
.metadata(ObjectMetaArgs.builder()
.labels(deployment.spec().applyValue(spec -> spec.get().template().metadata().get().labels()))
.build())
.spec(ServiceSpecArgs.builder()
.type(isMinikube ? ServiceSpecType.ClusterIP : ServiceSpecType.LoadBalancer)
.selector(labels)
.ports(ServicePortArgs.builder()
.port(80)
.targetPort(80)
.protocol("TCP")
.build())
.build())
.build());
ctx.export("ip", isMinikube
? frontend.spec().applyValue(spec -> spec.get().clusterIP())
: Output.tuple(frontend.status(), frontend.spec()).applyValue(t -> {
var status = t.t1;
var spec = t.t2;
var ingress = status.get().loadBalancer().get().ingress().get(0);
return ingress.ip().orElse(ingress.hostname().orElse(spec.get().clusterIP().get()));
})
);
});
}
}
name: quickstart
runtime: yaml
description: A minimal Kubernetes Pulumi YAML program
variables:
appLabels:
app: nginx
resources:
deployment:
type: kubernetes:apps/v1:Deployment
properties:
spec:
selector:
matchLabels: ${appLabels}
replicas: 1
template:
metadata:
labels: ${appLabels}
spec:
containers:
- name: nginx
image: nginx
service:
type: kubernetes:core/v1:Service
properties:
metadata:
labels: ${appLabels}
spec:
type: ClusterIP
selector: ${appLabels}
ports:
- port: 80
targetPort: 80
protocol: TCP
outputs:
ip: ${service.spec.clusterIP}
Our program now creates a service to access the NGINX deployment, and requires a new config value to indicate whether the program is being deployed to Minikube or not.
The configuration value can be set for the stack using pulumi config set isMinikube <true|false> command.
If you are currently using Minikube, set isMinikube to true, otherwise, set isMinikube to false as shown in the following command.
$ pulumi config set isMinikube false
Next, we’ll deploy the changes.
Thank you for your feedback!
If you have a question about how to use Pulumi, reach out in Community Slack.
Open an issue on GitHub to report a problem or suggest an improvement.
