fix(podman): ensure initial env type matches container runtime [r8s-98] (#12259)

api/datastore/test_data/output_24_to_latest.json

@@ -769,6 +769,7 @@
         "GpuUseList": null,
         "HealthyContainerCount": 0,
         "ImageCount": 9,
+        "IsPodman": false,
         "NodeCount": 0,
         "RunningContainerCount": 5,
         "ServiceCount": 0,

api/docker/snapshot.go

@@ -267,6 +267,17 @@ func snapshotVersion(snapshot *portainer.DockerSnapshot, cli *client.Client) err
 	}
 
 	snapshot.SnapshotRaw.Version = version
-
+	snapshot.IsPodman = isPodman(version)
 	return nil
 }
+
+// isPodman checks if the version is for Podman by checking if any of the components contain "podman".
+// If it's podman, a component name should be "Podman Engine"
+func isPodman(version types.Version) bool {
+	for _, component := range version.Components {
+		if strings.Contains(strings.ToLower(component.Name), "podman") {
+			return true
+		}
+	}
+	return false
+}

api/internal/snapshot/snapshot.go

@@ -219,6 +219,10 @@ func (service *Service) snapshotDockerEndpoint(endpoint *portainer.Endpoint) err
 		return err
 	}
 
+	if err := validateContainerEngineCompatibility(endpoint, dockerSnapshot); err != nil {
+		return err
+	}
+
 	if dockerSnapshot != nil {
 		snapshot := &portainer.Snapshot{EndpointID: endpoint.ID, Docker: dockerSnapshot}
 
@@ -228,6 +232,20 @@ func (service *Service) snapshotDockerEndpoint(endpoint *portainer.Endpoint) err
 	return nil
 }
 
+func validateContainerEngineCompatibility(endpoint *portainer.Endpoint, dockerSnapshot *portainer.DockerSnapshot) error {
+	if endpoint.ContainerEngine == portainer.ContainerEngineDocker && dockerSnapshot.IsPodman {
+		err := errors.New("the Docker environment option doesn't support Podman environments. Please select the Podman option instead.")
+		log.Error().Err(err).Str("endpoint", endpoint.Name).Msg(err.Error())
+		return err
+	}
+	if endpoint.ContainerEngine == portainer.ContainerEnginePodman && !dockerSnapshot.IsPodman {
+		err := errors.New("the Podman environment option doesn't support Docker environments. Please select the Docker option instead.")
+		log.Error().Err(err).Str("endpoint", endpoint.Name).Msg(err.Error())
+		return err
+	}
+	return nil
+}
+
 func (service *Service) startSnapshotLoop() {
 	ticker := time.NewTicker(time.Duration(service.snapshotIntervalInSeconds) * time.Second)
 

api/portainer.go

@@ -214,6 +214,7 @@ type (
 		NodeCount               int               `json:"NodeCount"`
 		GpuUseAll               bool              `json:"GpuUseAll"`
 		GpuUseList              []string          `json:"GpuUseList"`
+		IsPodman                bool              `json:"IsPodman"`
 	}
 
 	// DockerContainerSnapshot is an extent of Docker's Container struct