feat: some safety checks

docker/docker.go

@@ -14,6 +14,7 @@ import (
 
 	"net/http"
 
+	"github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/api/types/network"
 	"github.com/docker/docker/api/types/swarm"
 	"github.com/docker/docker/client"
@@ -149,6 +150,7 @@ func listServices(w http.ResponseWriter, r *http.Request){
 	}
 
 
+	SERVICES:
 	for _, service := range list{
 		var settings map[string]string = service.Spec.Labels; 
 		
@@ -159,12 +161,30 @@ func listServices(w http.ResponseWriter, r *http.Request){
 
 		targetVolumes := strings.Split(settings["blazena.volumes"], ",");
 
+		var validVolumeNames []string;
+		for _, mnt := range service.Spec.TaskTemplate.ContainerSpec.Mounts{
+			if mnt.Type != mount.TypeVolume {
+				continue
+			}
+			validVolumeNames = append(validVolumeNames, mnt.Source);
+		}
+
 		if !contains(validNodeHostnames, settings["blazena.node"]) {
-			errMsg := "node with hostname:'"+ settings["blazena.node"] +"' does not exist.";
+			errMsg := "Node with hostname:'"+ settings["blazena.node"] +"' does not exist.";
 			slog.Warn("Invalid Service Config!", slog.String("serviceId", service.ID), slog.String("errMessage", errMsg));
+			continue SERVICES;
+		}
+
+		for _, volume := range targetVolumes{
+			if contains(validVolumeNames, volume){
 				continue;
 			}
 
+			errMsg := "Volume name '"+ volume + "' is not in the service spec!";
+			slog.Warn("Invalid Service Config!", slog.String("serviceId", service.ID), slog.String("errMessage", errMsg));
+			continue SERVICES;
+		}
+
 		services = append(services, aService{
 			ServiceId: service.ID,
 			VolumeNames: targetVolumes,

host/exchangeKeys.go

@@ -1,10 +1,13 @@
 package host
 
 import (
+	"bytes"
 	"encoding/json"
 	"io"
+	"log/slog"
 	"net/http"
-	"bytes"
+	"os"
+
 	cfg "github.com/rony5394/blazena/config"
 );
 
@@ -19,12 +22,15 @@ func exchangeKeys(Config cfg.Config, sshKeyPem string)string{
 
 	if err != nil {
 		panic("Failed to marshal body."+ err.Error());
+		slog.Error("Failed to marshal body.", slog.Any("propagatedError", err), slog.String("note", "Input for this marshal operation is that ssh pk. So the kebab is going on!"))
+		os.Exit(42);
 	}
 
 	rq, err := http.NewRequest("POST", Config.DockerManagerBaseUrl + "/keys", bytes.NewBuffer(bodyEncoded)); 
 
 	if err != nil{
-		panic("Failed to create http request"+ err.Error());
+		slog.Error("Failed to create request", slog.Any("propagatedError", err), slog.String("note", "not send just create the object"));
+		os.Exit(1);
 	}
 
 	rq.Header.Set("Authorization", "Bearer "+ token);
@@ -32,7 +38,8 @@ func exchangeKeys(Config cfg.Config, sshKeyPem string)string{
 	rs, err := http.DefaultClient.Do(rq);
 
 	if err != nil{
-		panic("Failed to send http request"+ err.Error());
+		slog.Error("Failed to send http request", slog.Any("propagatedError", err));
+		os.Exit(1);
 	}
 
 	defer rs.Body.Close();
@@ -40,7 +47,8 @@ func exchangeKeys(Config cfg.Config, sshKeyPem string)string{
 	rsBodyRaw, err := io.ReadAll(rs.Body);
 
 	if err != nil{
-		panic("Failed to read response's body!"+err.Error());
+		slog.Error("Failed to read response body!" , slog.Any("propagatedError", err));
+		os.Exit(1);
 	}
 
 	var rsBody struct{
@@ -49,7 +57,8 @@ func exchangeKeys(Config cfg.Config, sshKeyPem string)string{
 
 	err = json.Unmarshal(rsBodyRaw, &rsBody);
 	if err != nil{
-		panic("Failed to unmarshal rsBodyRaw!"+ err.Error());
+		slog.Error("Failed to unmarshal rsBodyRaw!", slog.Any("propagatedError", err));
+		os.Exit(1);
 	}
 
 

host/host.go

@@ -102,6 +102,8 @@ func Run(Config cfg.Config) {
 		slog.Error("Failed to shutdown docker api!");
 		os.Exit(1);
 	}
+
+	slog.Info("Finished whole backup run.");
 }
 
 func getServices(Config cfg.Config)[]aService{

main.go

@@ -8,6 +8,18 @@ import (
 	"log/slog"
 );
 
+/*
+	If the exit code is X then it means Y:
+
+	| X  | Y                                                                                        |
+	|----|------------------------------------------------------------------------------------------|
+	| 0  | Everything should be good, normal exit.                                                  |
+	| 1  | Some common error, but that still mean it is going to crash.                             |
+	| 3  | Ask yourself if you are not using dev version in prod. If not then spam the developer.   |
+	| 42 | WHAT THE ACTUAL ***** IS HAPPENING. or assume something is very wrong in the app itself. |
+	| 69 | [INSERT HERE]                                                                            |
+*/
+
 func main() {
 	if(len(os.Args) < 2){
 		panic("Usage: blazena <mode>");