fix: linux/arm64 support (#562)

Adds everything necessary to not only ensure OTF runs on linux/arm64 but
can be tested on linux/arm64 too.

Fixes #311

.goreleaser.yml

@@ -70,19 +70,70 @@ dockers:
   ids:
   - otfd
   image_templates:
-  - "leg100/otfd:latest"
-  - "leg100/otfd:{{ .Version }}"
+  - "leg100/otfd:latest-amd64"
+  - "leg100/otfd:{{ .Version }}-amd64"
   skip_push: auto
   dockerfile: Dockerfile
+  use: buildx
+  build_flag_templates:
+  - "--pull"
+  - "--platform=linux/amd64"
+- goos: linux
+  goarch: arm64
+  ids:
+  - otfd
+  image_templates:
+  - "leg100/otfd:latest-arm64"
+  - "leg100/otfd:{{ .Version }}-arm64"
+  skip_push: auto
+  dockerfile: Dockerfile
+  use: buildx
+  build_flag_templates:
+  - "--pull"
+  - "--platform=linux/arm64"
 - goos: linux
   goarch: amd64
   ids:
   - otf-agent
   image_templates:
-  - "leg100/otf-agent:latest"
-  - "leg100/otf-agent:{{ .Version }}"
+  - "leg100/otf-agent:latest-amd64"
+  - "leg100/otf-agent:{{ .Version }}-amd64"
+  skip_push: auto
+  dockerfile: Dockerfile.agent
+  use: buildx
+  build_flag_templates:
+  - "--pull"
+  - "--platform=linux/amd64"
+- goos: linux
+  goarch: arm64
+  ids:
+  - otf-agent
+  image_templates:
+  - "leg100/otf-agent:latest-arm64"
+  - "leg100/otf-agent:{{ .Version }}-arm64"
   skip_push: auto
   dockerfile: Dockerfile.agent
+  use: buildx
+  build_flag_templates:
+  - "--pull"
+  - "--platform=linux/arm64"
+docker_manifests:
+- name_template: 'leg100/otfd:latest'
+  image_templates:
+  - "leg100/otfd:latest-amd64"
+  - "leg100/otfd:latest-arm64"
+- name_template: 'leg100/otfd:{{ .Version }}'
+  image_templates:
+  - "leg100/otfd:{{ .Version }}-amd64"
+  - "leg100/otfd:{{ .Version }}-arm64"
+- name_template: 'leg100/otf-agent:latest'
+  image_templates:
+  - "leg100/otf-agent:latest-amd64"
+  - "leg100/otf-agent:latest-arm64"
+- name_template: 'leg100/otf-agent:{{ .Version }}'
+  image_templates:
+  - "leg100/otf-agent:{{ .Version }}-amd64"
+  - "leg100/otf-agent:{{ .Version }}-arm64"
 release:
   footer: |
     ## Docker images

internal/integration/main_test.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"runtime"
 	"testing"
 
 	"github.com/leg100/otf/internal"
@@ -72,15 +73,19 @@ func doMain(m *testing.M) (int, error) {
 	defer unset()
 
 	// get pubsub emulator host and set environment variable
-	pubsub, err := testcompose.GetHost(testcompose.PubSub)
-	if err != nil {
-		return 0, fmt.Errorf("getting squid host: %w", err)
-	}
-	unset, err = setenv("PUBSUB_EMULATOR_HOST", pubsub)
-	if err != nil {
-		return 0, err
+	//
+	// NOTE: gcp pub sub emulator only runs on amd64
+	if runtime.GOARCH == "amd64" {
+		pubsub, err := testcompose.GetHost(testcompose.PubSub)
+		if err != nil {
+			return 0, fmt.Errorf("getting pub sub emulator host: %w", err)
+		}
+		unset, err = setenv("PUBSUB_EMULATOR_HOST", pubsub)
+		if err != nil {
+			return 0, err
+		}
+		defer unset()
 	}
-	defer unset()
 
 	// The otfd daemon spawned in an integration test uses a self-signed cert.
 	// The following environment variable instructs any Go program spawned in a

internal/integration/notification_gcppubsub_test.go

@@ -3,6 +3,7 @@ package integration
 import (
 	"context"
 	"encoding/json"
+	"runtime"
 	"testing"
 
 	"cloud.google.com/go/pubsub"
@@ -18,6 +19,9 @@ import (
 // TestIntegration_NotificationGCPPubSub demonstrates run events triggering the
 // sending of notifications to a GCP pub-sub topic.
 func TestIntegration_NotificationGCPPubSub(t *testing.T) {
+	if runtime.GOARCH != "amd64" {
+		t.Skip("gcp pubsub emulator only runs on amd64")
+	}
 	testutils.SkipIfEnvUnspecified(t, "PUBSUB_EMULATOR_HOST")
 
 	integrationTest(t)

internal/notifications/client_gcppubsub_test.go

@@ -4,12 +4,13 @@ import (
 	"testing"
 
 	"github.com/leg100/otf/internal"
-	"github.com/leg100/otf/internal/testutils"
 	"github.com/stretchr/testify/require"
 )
 
 func TestPubSubClient_New(t *testing.T) {
-	testutils.SkipIfEnvUnspecified(t, "PUBSUB_EMULATOR_HOST")
+	// PUBSUB_EMULATOR_HOST is not actually used but ensures the check for valid
+	// google credentials is skipped.
+	t.Setenv("PUBSUB_EMULATOR_HOST", "foobar")
 
 	tests := []struct {
 		name string

internal/testcompose/testcompose.go

@@ -6,6 +6,7 @@ import (
 	"bytes"
 	"fmt"
 	"os/exec"
+	"runtime"
 	"strconv"
 	"strings"
 )
@@ -27,7 +28,11 @@ var ports = map[Service]int{
 func Up() error {
 	// --wait implies -d, which detaches the containers
 	args := []string{"compose", "-p", "otf", "up", "--wait", "--wait-timeout", "60"}
-	args = append(args, string(Postgres), string(Squid), string(PubSub))
+	args = append(args, string(Postgres), string(Squid))
+	// gcp pub sub emulator only runs on amd64
+	if runtime.GOARCH == "amd64" {
+		args = append(args, string(PubSub))
+	}
 	cmd := exec.Command("docker", args...)
 
 	var buferr bytes.Buffer