Enable support to create app in any namespace

Before this PR, the Kube deployer was able to deploy an app only in the
default namespace. With this PR, the user can deploy an app in any
namespace. The custom namespace can be specified through config.

cmd/weaver-kube/deploy.go

@@ -112,6 +112,9 @@ func deploy(ctx context.Context, args []string) error {
 	if config.Image == "" {
 		return fmt.Errorf("No image name provided in config file. See `weaver kube deploy --help` for details")
 	}
+	if config.Namespace == "" {
+		config.Namespace = "default"
+	}
 	binListeners, err := bin.ReadListeners(app.Binary)
 	if err != nil {
 		return fmt.Errorf("cannot read listeners from binary %s: %w", app.Binary, err)

go.mod

@@ -3,7 +3,7 @@ module github.com/ServiceWeaver/weaver-kube
 go 1.21
 
 require (
-	github.com/ServiceWeaver/weaver v0.18.0
+	github.com/ServiceWeaver/weaver v0.18.1
 	github.com/google/uuid v1.3.0
 	go.opentelemetry.io/otel v1.16.0
 	go.opentelemetry.io/otel/exporters/jaeger v1.16.0

go.sum

@@ -39,8 +39,8 @@ github.com/DataDog/hyperloglog v0.0.0-20220804205443-1806d9b66146 h1:S5WsRc58vIe
 github.com/DataDog/hyperloglog v0.0.0-20220804205443-1806d9b66146/go.mod h1:hFPkswc42pKhRbeKDKXy05mRi7J1kJ2vMNbvd9erH0M=
 github.com/DataDog/mmh3 v0.0.0-20210722141835-012dc69a9e49 h1:EbzDX8HPk5uE2FsJYxD74QmMw0/3CqSKhEr6teh0ncQ=
 github.com/DataDog/mmh3 v0.0.0-20210722141835-012dc69a9e49/go.mod h1:SvsjzyJlSg0rKsqYgdcFxeEVflx3ZNAyFfkUHP0TxXg=
-github.com/ServiceWeaver/weaver v0.18.0 h1:b62r1E9mYnCaPEH+KOT34FsMjSZNLFSlXEnNLTR0pyM=
-github.com/ServiceWeaver/weaver v0.18.0/go.mod h1:/tJzitb+h8nLeHa4Mk7iIGU5ZV4OGB4C9IvIfD8n/1I=
+github.com/ServiceWeaver/weaver v0.18.1 h1:SE3YhFO58xm3zjYY1wF4Lbz928m27tmQdnbEsdagil4=
+github.com/ServiceWeaver/weaver v0.18.1/go.mod h1:/tJzitb+h8nLeHa4Mk7iIGU5ZV4OGB4C9IvIfD8n/1I=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230305170008-8188dc5388df h1:7RFfzj4SSt6nnvCPbCqijJi1nWCd+TqAT3bYCStRC18=
 github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230305170008-8188dc5388df/go.mod h1:pSwJ0fSY5KhvocuWSx4fz3BA8OrA1bQn+K1Eli3BRwM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=

internal/impl/babysitter.go

@@ -188,7 +188,7 @@ func (b *babysitter) watchPods(ctx context.Context, component string) error {
 	rs := replicaSet(component, b.cfg.Deployment)
 	name := name{b.cfg.Deployment.App.Name, rs, b.cfg.Deployment.Id[:8]}.DNSLabel()
 	opts := metav1.ListOptions{LabelSelector: fmt.Sprintf("depName=%s", name)}
-	watcher, err := b.clientset.CoreV1().Pods("default").Watch(ctx, opts)
+	watcher, err := b.clientset.CoreV1().Pods(b.cfg.Namespace).Watch(ctx, opts)
 	if err != nil {
 		return fmt.Errorf("watch pods for component %s: %w", component, err)
 	}