Step by Step Guide to Building a PagerDuty API Integration in Go

Introduction

Hey there, fellow developer! Ready to supercharge your incident management with PagerDuty? Let's dive into building a slick API integration using Go. PagerDuty's API is a powerhouse for automating incident response, and we're about to harness that power with some clean Go code.

Prerequisites

Before we jump in, make sure you've got:

• Go installed (you're a Go dev, right?)
• A PagerDuty account with an API key (if not, go grab one real quick)

Setting up the project

Let's kick things off:

mkdir pagerduty-integration
cd pagerduty-integration
go mod init github.com/yourusername/pagerduty-integration

Now, let's grab the PagerDuty Go client:

go get github.com/PagerDuty/go-pagerduty

Authentication

Time to get that API key working for us:

package main

import (
    "github.com/PagerDuty/go-pagerduty"
)

func main() {
    client := pagerduty.NewClient("YOUR_API_KEY")
    // We're in business!
}

Basic API Operations

Let's flex those API muscles:

Listing incidents

opts := pagerduty.ListIncidentsOptions{
    Status: "triggered,acknowledged",
    Limit:  10,
}
if incidents, err := client.ListIncidents(opts); err != nil {
    log.Fatal(err)
} else {
    for _, incident := range incidents.Incidents {
        fmt.Printf("Incident ID: %s, Title: %s\n", incident.Id, incident.Title)
    }
}

Creating an incident

incident := pagerduty.CreateIncidentOptions{
    Title:       "The server is on fire!",
    ServiceID:   "YOUR_SERVICE_ID",
    UrgencyRule: "high",
}
if _, err := client.CreateIncident("YOUR_USER_EMAIL", &incident); err != nil {
    log.Fatal(err)
}

Updating an incident status

if err := client.AcknowledgeIncident("YOUR_USER_EMAIL", "INCIDENT_ID"); err != nil {
    log.Fatal(err)
}

Advanced Features

Implementing pagination

var allIncidents []pagerduty.Incident
opts := pagerduty.ListIncidentsOptions{Limit: 100}

for {
    if incidents, err := client.ListIncidents(opts); err != nil {
        log.Fatal(err)
    } else {
        allIncidents = append(allIncidents, incidents.Incidents...)
        if !incidents.More {
            break
        }
        opts.Offset = incidents.Offset + incidents.Limit
    }
}

Error handling and retries

func retryableRequest(f func() error) error {
    maxRetries := 3
    for i := 0; i < maxRetries; i++ {
        err := f()
        if err == nil {
            return nil
        }
        if i == maxRetries-1 {
            return err
        }
        time.Sleep(time.Second * time.Duration(i+1))
    }
    return nil
}

// Usage
err := retryableRequest(func() error {
    _, err := client.CreateIncident("YOUR_USER_EMAIL", &incident)
    return err
})

Webhooks Integration

Set up a simple HTTP server to listen for webhooks:

http.HandleFunc("/webhook", func(w http.ResponseWriter, r *http.Request) {
    body, _ := ioutil.ReadAll(r.Body)
    var event pagerduty.WebhookPayload
    if err := json.Unmarshal(body, &event); err != nil {
        http.Error(w, "Invalid payload", http.StatusBadRequest)
        return
    }
    // Process the event
    fmt.Printf("Received event: %s\n", event.Messages[0].Event)
    w.WriteHeader(http.StatusOK)
})
http.ListenAndServe(":8080", nil)

Testing

Here's a quick unit test example:

func TestListIncidents(t *testing.T) {
    client := pagerduty.NewClient("MOCK_API_KEY")
    opts := pagerduty.ListIncidentsOptions{Limit: 1}
    incidents, err := client.ListIncidents(opts)
    assert.NoError(t, err)
    assert.Equal(t, 1, len(incidents.Incidents))
}

Best Practices

• Respect rate limits: PagerDuty caps at 900 requests per minute. Implement a rate limiter if needed.
• Log everything: It'll save your bacon when debugging.
• Monitor your integration: Set up alerts for failed API calls or unprocessed webhooks.

Conclusion

And there you have it! You've just built a robust PagerDuty integration in Go. From basic operations to advanced features, you're now equipped to automate your incident management like a pro. Remember, the PagerDuty API docs are your friend for diving deeper. Now go forth and code some awesome automations!

Happy coding, and may your incidents be few and far between! 🚀