Expand logging, and daemonless command support.

This adds more logging in certain places, and adds logging to the CLI.
It also allows for certain commands in the CLI to be used without a
daemon connection, namely `init`, which previously required the daemon
to be connected, but now does not since it doesnt need it.

internal/services/proxy/proxy.go

@@ -41,6 +41,7 @@ func (proxyManager *ProxyManager) ListenAndServe(host string) error {
 
 // Stops forwarding traffic to a deployment
 func (proxyManager *ProxyManager) RemoveDeployment(host string) {
+	proxyManager.logger.Debugw("Removing proxy", zap.String("host", host))
 	proxyManager.Delete(host)
 }
 
@@ -65,25 +66,20 @@ func (proxyManager *ProxyManager) ServeHTTP(w http.ResponseWriter, r *http.Reque
 }
 
 type Proxy struct {
-	forwardingFor  url.URL
-	proxyFunc      *httputil.ReverseProxy
-	gracePeriod    time.Duration
-	activeRequests int64
+	forwardingFor   url.URL
+	proxyFunc       *httputil.ReverseProxy
+	shutdownTimeout time.Duration
+	activeRequests  int64
 }
 
-// type DeploymentProxy struct {
-// 	deployment     *models.Deployment
-// 	proxy          *httputil.ReverseProxy
-// 	gracePeriod    time.Duration
-// 	activeRequests int64
-// }
+const PROXY_SHUTDOWN_TIMEOUT = 30 * time.Second
 
 // Creates a proxy for a given deployment
 func NewDeploymentProxy(forwardingFor url.URL) (*Proxy, error) {
 	proxy := &Proxy{
-		forwardingFor:  forwardingFor,
-		gracePeriod:    time.Second * 30,
-		activeRequests: 0,
+		forwardingFor:   forwardingFor,
+		shutdownTimeout: PROXY_SHUTDOWN_TIMEOUT,
+		activeRequests:  0,
 	}
 
 	proxy.proxyFunc = &httputil.ReverseProxy{
@@ -111,17 +107,22 @@ func NewDeploymentProxy(forwardingFor url.URL) (*Proxy, error) {
 }
 
 // Drains connections from a proxy
-func (p *Proxy) GracefulShutdown(shutdownFunc func()) {
-	ctx, cancel := context.WithTimeout(context.Background(), p.gracePeriod)
+func (p *Proxy) GracefulShutdown(logger *zap.SugaredLogger, shutdownFunc func()) {
+	logger.Debugw("Shutting down proxy", zap.String("host", p.forwardingFor.Host))
+
+	ctx, cancel := context.WithTimeout(context.Background(), p.shutdownTimeout)
 	defer cancel()
 
 	done := false
 	for !done {
 		select {
 		case <-ctx.Done():
+			logger.Debugw("Proxy shutdown timed out", zap.String("host", p.forwardingFor.Host))
+
 			done = true
 		default:
 			if atomic.LoadInt64(&p.activeRequests) == 0 {
+				logger.Debugw("Proxy shutdown completed successfully", zap.String("host", p.forwardingFor.Host))
 				done = true
 			}