X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FN2VC.git;a=blobdiff_plain;f=n2vc%2Fk8s_helm_base_conn.py;h=149b064ba5ed57fb5fbccac5ae7705eba074d07f;hp=1aa95d2b163aee10c1cc721ddf7d32e97c7fa17d;hb=60a3a96717d7c36ba7a65573da59a6bc039f5e28;hpb=095392b4b80e0b63c66282f283c1139ec0536750

diff --git a/n2vc/k8s_helm_base_conn.py b/n2vc/k8s_helm_base_conn.py
index 1aa95d2..149b064 100644
--- a/n2vc/k8s_helm_base_conn.py
+++ b/n2vc/k8s_helm_base_conn.py
@@ -21,16 +21,17 @@
 ##
 import abc
 import asyncio
+from typing import Union
 import random
 import time
 import shlex
 import shutil
 import stat
-import subprocess
 import os
 import yaml
 from uuid import uuid4
 
+from n2vc.config import EnvironConfig
 from n2vc.exceptions import K8sException
 from n2vc.k8s_conn import K8sConnector
 
@@ -42,6 +43,7 @@ class K8sHelmBaseConnector(K8sConnector):
     ################################### P U B L I C ####################################
     ####################################################################################
     """
+
     service_account = "osm"
 
     def __init__(
@@ -68,6 +70,7 @@ class K8sHelmBaseConnector(K8sConnector):
 
         self.log.info("Initializing K8S Helm connector")
 
+        self.config = EnvironConfig()
         # random numbers for release name generation
         random.seed(time.time())
 
@@ -82,17 +85,26 @@ class K8sHelmBaseConnector(K8sConnector):
         self._helm_command = helm_command
         self._check_file_exists(filename=helm_command, exception_if_not_exists=True)
 
+        # obtain stable repo url from config or apply default
+        self._stable_repo_url = self.config.get("stablerepourl")
+        if self._stable_repo_url == "None":
+            self._stable_repo_url = None
+
     @staticmethod
     def _get_namespace_cluster_id(cluster_uuid: str) -> (str, str):
         """
         Parses cluster_uuid stored at database that can be either 'namespace:cluster_id' or only
         cluster_id for backward compatibility
         """
-        namespace, _, cluster_id = cluster_uuid.rpartition(':')
+        namespace, _, cluster_id = cluster_uuid.rpartition(":")
         return namespace, cluster_id
 
     async def init_env(
-            self, k8s_creds: str, namespace: str = "kube-system", reuse_cluster_uuid=None
+        self,
+        k8s_creds: str,
+        namespace: str = "kube-system",
+        reuse_cluster_uuid=None,
+        **kwargs,
     ) -> (str, bool):
         """
         It prepares a given K8s cluster environment to run Charts
@@ -102,6 +114,7 @@ class K8sHelmBaseConnector(K8sConnector):
         :param namespace: optional namespace to be used for helm. By default,
             'kube-system' will be used
         :param reuse_cluster_uuid: existing cluster uuid for reuse
+        :param kwargs: Additional parameters (None yet)
         :return: uuid of the K8s cluster and True if connector has installed some
             software in the cluster
         (on error, an exception will be raised)
@@ -114,7 +127,9 @@ class K8sHelmBaseConnector(K8sConnector):
             cluster_id = str(uuid4())
         cluster_uuid = "{}:{}".format(namespace, cluster_id)
 
-        self.log.debug("Initializing K8S Cluster {}. namespace: {}".format(cluster_id, namespace))
+        self.log.debug(
+            "Initializing K8S Cluster {}. namespace: {}".format(cluster_id, namespace)
+        )
 
         paths, env = self._init_paths_env(
             cluster_name=cluster_id, create_if_not_exist=True
@@ -135,33 +150,63 @@ class K8sHelmBaseConnector(K8sConnector):
         return cluster_uuid, n2vc_installed_sw
 
     async def repo_add(
-            self, cluster_uuid: str, name: str, url: str, repo_type: str = "chart"
+        self, cluster_uuid: str, name: str, url: str, repo_type: str = "chart"
     ):
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
-        self.log.debug("Cluster {}, adding {} repository {}. URL: {}".format(
-            cluster_id, repo_type, name, url))
+        self.log.debug(
+            "Cluster {}, adding {} repository {}. URL: {}".format(
+                cluster_id, repo_type, name, url
+            )
+        )
+
+        # init_env
+        paths, env = self._init_paths_env(
+            cluster_name=cluster_id, create_if_not_exist=True
+        )
 
         # sync local dir
         self.fs.sync(from_path=cluster_id)
 
+        # helm repo add name url
+        command = "env KUBECONFIG={} {} repo add {} {}".format(
+            paths["kube_config"], self._helm_command, name, url
+        )
+        self.log.debug("adding repo: {}".format(command))
+        await self._local_async_exec(
+            command=command, raise_exception_on_error=True, env=env
+        )
+
+        # helm repo update
+        command = "env KUBECONFIG={} {} repo update {}".format(
+            paths["kube_config"], self._helm_command, name
+        )
+        self.log.debug("updating repo: {}".format(command))
+        await self._local_async_exec(
+            command=command, raise_exception_on_error=False, env=env
+        )
+
+        # sync fs
+        self.fs.reverse_sync(from_path=cluster_id)
+
+    async def repo_update(self, cluster_id: str, name: str, repo_type: str = "chart"):
+        self.log.debug(
+            "Cluster {}, updating {} repository {}".format(cluster_id, repo_type, name)
+        )
+
         # init_env
         paths, env = self._init_paths_env(
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
         # helm repo update
-        command = "{} repo update".format(
-            self._helm_command
-        )
+        command = "{} repo update {}".format(self._helm_command, name)
         self.log.debug("updating repo: {}".format(command))
-        await self._local_async_exec(command=command, raise_exception_on_error=False, env=env)
-
-        # helm repo add name url
-        command = "{} repo add {} {}".format(
-            self._helm_command, name, url
+        await self._local_async_exec(
+            command=command, raise_exception_on_error=False, env=env
         )
-        self.log.debug("adding repo: {}".format(command))
-        await self._local_async_exec(command=command, raise_exception_on_error=True, env=env)
 
         # sync fs
         self.fs.reverse_sync(from_path=cluster_id)
@@ -176,16 +221,16 @@ class K8sHelmBaseConnector(K8sConnector):
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
         self.log.debug("list repositories for cluster {}".format(cluster_id))
 
-        # sync local dir
-        self.fs.sync(from_path=cluster_id)
-
         # config filename
         paths, env = self._init_paths_env(
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
-        command = "{} repo list --output yaml".format(
-            self._helm_command
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
+        command = "env KUBECONFIG={} {} repo list --output yaml".format(
+            paths["kube_config"], self._helm_command
         )
 
         # Set exception to false because if there are no repos just want an empty list
@@ -207,33 +252,50 @@ class K8sHelmBaseConnector(K8sConnector):
             return []
 
     async def repo_remove(self, cluster_uuid: str, name: str):
-
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
         self.log.debug("remove {} repositories for cluster {}".format(name, cluster_id))
 
-        # sync local dir
-        self.fs.sync(from_path=cluster_id)
-
         # init env, paths
         paths, env = self._init_paths_env(
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
-        command = "{} repo remove {}".format(
-            self._helm_command, name
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
+        command = "env KUBECONFIG={} {} repo remove {}".format(
+            paths["kube_config"], self._helm_command, name
+        )
+        await self._local_async_exec(
+            command=command, raise_exception_on_error=True, env=env
         )
-        await self._local_async_exec(command=command, raise_exception_on_error=True, env=env)
 
         # sync fs
         self.fs.reverse_sync(from_path=cluster_id)
 
     async def reset(
-            self, cluster_uuid: str, force: bool = False, uninstall_sw: bool = False
+        self,
+        cluster_uuid: str,
+        force: bool = False,
+        uninstall_sw: bool = False,
+        **kwargs,
     ) -> bool:
+        """Reset a cluster
 
+        Resets the Kubernetes cluster by removing the helm deployment that represents it.
+
+        :param cluster_uuid: The UUID of the cluster to reset
+        :param force: Boolean to force the reset
+        :param uninstall_sw: Boolean to force the reset
+        :param kwargs: Additional parameters (None yet)
+        :return: Returns True if successful or raises an exception.
+        """
         namespace, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
-        self.log.debug("Resetting K8s environment. cluster uuid: {} uninstall={}"
-                       .format(cluster_id, uninstall_sw))
+        self.log.debug(
+            "Resetting K8s environment. cluster uuid: {} uninstall={}".format(
+                cluster_id, uninstall_sw
+            )
+        )
 
         # sync local dir
         self.fs.sync(from_path=cluster_id)
@@ -258,14 +320,18 @@ class K8sHelmBaseConnector(K8sConnector):
                             # that in some cases of previously installed helm releases it
                             # raised an error
                             self.log.warn(
-                                "Error uninstalling release {}: {}".format(kdu_instance, e)
+                                "Error uninstalling release {}: {}".format(
+                                    kdu_instance, e
+                                )
                             )
                 else:
                     msg = (
                         "Cluster uuid: {} has releases and not force. Leaving K8s helm environment"
                     ).format(cluster_id)
                     self.log.warn(msg)
-                    uninstall_sw = False  # Allow to remove k8s cluster without removing Tiller
+                    uninstall_sw = (
+                        False  # Allow to remove k8s cluster without removing Tiller
+                    )
 
         if uninstall_sw:
             await self._uninstall_sw(cluster_id, namespace)
@@ -280,18 +346,24 @@ class K8sHelmBaseConnector(K8sConnector):
         return True
 
     async def _install_impl(
-            self,
-            cluster_id: str,
-            kdu_model: str,
-            paths: dict,
-            env: dict,
-            atomic: bool = True,
-            timeout: float = 300,
-            params: dict = None,
-            db_dict: dict = None,
-            kdu_name: str = None,
-            namespace: str = None,
+        self,
+        cluster_id: str,
+        kdu_model: str,
+        paths: dict,
+        env: dict,
+        kdu_instance: str,
+        atomic: bool = True,
+        timeout: float = 300,
+        params: dict = None,
+        db_dict: dict = None,
+        kdu_name: str = None,
+        namespace: str = None,
     ):
+        # init env, paths
+        paths, env = self._init_paths_env(
+            cluster_name=cluster_id, create_if_not_exist=True
+        )
+
         # params to str
         params_str, file_to_delete = self._params_to_file_option(
             cluster_id=cluster_id, params=params
@@ -305,25 +377,20 @@ class K8sHelmBaseConnector(K8sConnector):
                 version = str(parts[1])
                 kdu_model = parts[0]
 
-        # generate a name for the release. Then, check if already exists
-        kdu_instance = None
-        while kdu_instance is None:
-            kdu_instance = self._generate_release_name(kdu_model)
-            try:
-                result = await self._status_kdu(
-                    cluster_id=cluster_id,
-                    kdu_instance=kdu_instance,
-                    namespace=namespace,
-                    show_error_log=False,
-                )
-                if result is not None:
-                    # instance already exists: generate a new one
-                    kdu_instance = None
-            except K8sException:
-                pass
-
-        command = self._get_install_command(kdu_model, kdu_instance, namespace,
-                                            params_str, version, atomic, timeout)
+        repo = self._split_repo(kdu_model)
+        if repo:
+            await self.repo_update(cluster_id, repo)
+
+        command = self._get_install_command(
+            kdu_model,
+            kdu_instance,
+            namespace,
+            params_str,
+            version,
+            atomic,
+            timeout,
+            paths["kube_config"],
+        )
 
         self.log.debug("installing: {}".format(command))
 
@@ -343,7 +410,6 @@ class K8sHelmBaseConnector(K8sConnector):
                     namespace=namespace,
                     db_dict=db_dict,
                     operation="install",
-                    run_once=False,
                 )
             )
 
@@ -356,7 +422,6 @@ class K8sHelmBaseConnector(K8sConnector):
             output, rc = exec_task.result()
 
         else:
-
             output, rc = await self._local_async_exec(
                 command=command, raise_exception_on_error=False, env=env
             )
@@ -372,8 +437,6 @@ class K8sHelmBaseConnector(K8sConnector):
             namespace=namespace,
             db_dict=db_dict,
             operation="install",
-            run_once=True,
-            check_every=0,
         )
 
         if rc != 0:
@@ -381,8 +444,6 @@ class K8sHelmBaseConnector(K8sConnector):
             self.log.error(msg)
             raise K8sException(msg)
 
-        return kdu_instance
-
     async def upgrade(
         self,
         cluster_uuid: str,
@@ -409,6 +470,9 @@ class K8sHelmBaseConnector(K8sConnector):
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
         # params to str
         params_str, file_to_delete = self._params_to_file_option(
             cluster_id=cluster_id, params=params
@@ -422,13 +486,24 @@ class K8sHelmBaseConnector(K8sConnector):
                 version = str(parts[1])
                 kdu_model = parts[0]
 
-        command = self._get_upgrade_command(kdu_model, kdu_instance, instance_info["namespace"],
-                                            params_str, version, atomic, timeout)
+        repo = self._split_repo(kdu_model)
+        if repo:
+            await self.repo_update(cluster_id, repo)
+
+        command = self._get_upgrade_command(
+            kdu_model,
+            kdu_instance,
+            instance_info["namespace"],
+            params_str,
+            version,
+            atomic,
+            timeout,
+            paths["kube_config"],
+        )
 
         self.log.debug("upgrading: {}".format(command))
 
         if atomic:
-
             # exec helm in a task
             exec_task = asyncio.ensure_future(
                 coro_or_future=self._local_async_exec(
@@ -443,7 +518,6 @@ class K8sHelmBaseConnector(K8sConnector):
                     namespace=instance_info["namespace"],
                     db_dict=db_dict,
                     operation="upgrade",
-                    run_once=False,
                 )
             )
 
@@ -455,7 +529,6 @@ class K8sHelmBaseConnector(K8sConnector):
             output, rc = exec_task.result()
 
         else:
-
             output, rc = await self._local_async_exec(
                 command=command, raise_exception_on_error=False, env=env
             )
@@ -471,8 +544,6 @@ class K8sHelmBaseConnector(K8sConnector):
             namespace=instance_info["namespace"],
             db_dict=db_dict,
             operation="upgrade",
-            run_once=True,
-            check_every=0,
         )
 
         if rc != 0:
@@ -494,10 +565,27 @@ class K8sHelmBaseConnector(K8sConnector):
         else:
             return 0
 
+    async def scale(
+        self,
+        kdu_instance: str,
+        scale: int,
+        resource_name: str,
+        total_timeout: float = 1800,
+        **kwargs,
+    ):
+        raise NotImplementedError("Method not implemented")
+
+    async def get_scale_count(
+        self,
+        resource_name: str,
+        kdu_instance: str,
+        **kwargs,
+    ):
+        raise NotImplementedError("Method not implemented")
+
     async def rollback(
         self, cluster_uuid: str, kdu_instance: str, revision=0, db_dict: dict = None
     ):
-
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
         self.log.debug(
             "rollback kdu_instance {} to revision {} from cluster {}".format(
@@ -518,8 +606,12 @@ class K8sHelmBaseConnector(K8sConnector):
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
-        command = self._get_rollback_command(kdu_instance, instance_info["namespace"],
-                                             revision)
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
+        command = self._get_rollback_command(
+            kdu_instance, instance_info["namespace"], revision, paths["kube_config"]
+        )
 
         self.log.debug("rolling_back: {}".format(command))
 
@@ -537,7 +629,6 @@ class K8sHelmBaseConnector(K8sConnector):
                 namespace=instance_info["namespace"],
                 db_dict=db_dict,
                 operation="rollback",
-                run_once=False,
             )
         )
 
@@ -556,8 +647,6 @@ class K8sHelmBaseConnector(K8sConnector):
             namespace=instance_info["namespace"],
             db_dict=db_dict,
             operation="rollback",
-            run_once=True,
-            check_every=0,
         )
 
         if rc != 0:
@@ -579,7 +668,7 @@ class K8sHelmBaseConnector(K8sConnector):
         else:
             return 0
 
-    async def uninstall(self, cluster_uuid: str, kdu_instance: str):
+    async def uninstall(self, cluster_uuid: str, kdu_instance: str, **kwargs):
         """
         Removes an existing KDU instance. It would implicitly use the `delete` or 'uninstall' call
         (this call should happen after all _terminate-config-primitive_ of the VNF
@@ -587,14 +676,13 @@ class K8sHelmBaseConnector(K8sConnector):
 
         :param cluster_uuid: UUID of a K8s cluster known by OSM, or namespace:cluster_id
         :param kdu_instance: unique name for the KDU instance to be deleted
+        :param kwargs: Additional parameters (None yet)
         :return: True if successful
         """
 
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
         self.log.debug(
-            "uninstall kdu_instance {} from cluster {}".format(
-                kdu_instance, cluster_id
-            )
+            "uninstall kdu_instance {} from cluster {}".format(kdu_instance, cluster_id)
         )
 
         # sync local dir
@@ -603,14 +691,19 @@ class K8sHelmBaseConnector(K8sConnector):
         # look for instance to obtain namespace
         instance_info = await self.get_instance_info(cluster_uuid, kdu_instance)
         if not instance_info:
-            raise K8sException("kdu_instance {} not found".format(kdu_instance))
-
+            self.log.warning(("kdu_instance {} not found".format(kdu_instance)))
+            return True
         # init env, paths
         paths, env = self._init_paths_env(
             cluster_name=cluster_id, create_if_not_exist=True
         )
 
-        command = self._get_uninstall_command(kdu_instance, instance_info["namespace"])
+        # sync local dir
+        self.fs.sync(from_path=cluster_id)
+
+        command = self._get_uninstall_command(
+            kdu_instance, instance_info["namespace"], paths["kube_config"]
+        )
         output, _rc = await self._local_async_exec(
             command=command, raise_exception_on_error=True, env=env
         )
@@ -658,6 +751,7 @@ class K8sHelmBaseConnector(K8sConnector):
         timeout: float = 300,
         params: dict = None,
         db_dict: dict = None,
+        **kwargs,
     ) -> str:
         """Exec primitive (Juju action)
 
@@ -667,6 +761,7 @@ class K8sHelmBaseConnector(K8sConnector):
         :param timeout: Timeout for action execution
         :param params: Dictionary of all the parameters needed for the action
         :db_dict: Dictionary for any additional data
+        :param kwargs: Additional parameters (None yet)
 
         :return: Returns the output of the action
         """
@@ -675,10 +770,9 @@ class K8sHelmBaseConnector(K8sConnector):
             "different from rollback, upgrade and status"
         )
 
-    async def get_services(self,
-                           cluster_uuid: str,
-                           kdu_instance: str,
-                           namespace: str) -> list:
+    async def get_services(
+        self, cluster_uuid: str, kdu_instance: str, namespace: str
+    ) -> list:
         """
         Returns a list of services defined for the specified kdu instance.
 
@@ -702,11 +796,18 @@ class K8sHelmBaseConnector(K8sConnector):
             )
         )
 
+        # init env, paths
+        paths, env = self._init_paths_env(
+            cluster_name=cluster_id, create_if_not_exist=True
+        )
+
         # sync local dir
         self.fs.sync(from_path=cluster_id)
 
         # get list of services names for kdu
-        service_names = await self._get_services(cluster_id, kdu_instance, namespace)
+        service_names = await self._get_services(
+            cluster_id, kdu_instance, namespace, paths["kube_config"]
+        )
 
         service_list = []
         for service in service_names:
@@ -718,14 +819,13 @@ class K8sHelmBaseConnector(K8sConnector):
 
         return service_list
 
-    async def get_service(self,
-                          cluster_uuid: str,
-                          service_name: str,
-                          namespace: str) -> object:
-
+    async def get_service(
+        self, cluster_uuid: str, service_name: str, namespace: str
+    ) -> object:
         self.log.debug(
             "get service, service_name: {}, namespace: {}, cluster_uuid: {}".format(
-                service_name, namespace, cluster_uuid)
+                service_name, namespace, cluster_uuid
+            )
         )
 
         _, cluster_id = self._get_namespace_cluster_id(cluster_uuid)
@@ -740,8 +840,34 @@ class K8sHelmBaseConnector(K8sConnector):
 
         return service
 
-    async def status_kdu(self, cluster_uuid: str, kdu_instance: str) -> str:
+    async def status_kdu(
+        self, cluster_uuid: str, kdu_instance: str, yaml_format: str = False, **kwargs
+    ) -> Union[str, dict]:
+        """
+        This call would retrieve tha current state of a given KDU instance. It would be
+        would allow to retrieve the _composition_ (i.e. K8s objects) and _specific
+        values_ of the configuration parameters applied to a given instance. This call
+        would be based on the `status` call.
+
+        :param cluster_uuid: UUID of a K8s cluster known by OSM
+        :param kdu_instance: unique name for the KDU instance
+        :param kwargs: Additional parameters (None yet)
+        :param yaml_format: if the return shall be returned as an YAML string or as a
+                                dictionary
+        :return: If successful, it will return the following vector of arguments:
+        - K8s `namespace` in the cluster where the KDU lives
+        - `state` of the KDU instance. It can be:
+              - UNKNOWN
+              - DEPLOYED
+              - DELETED
+              - SUPERSEDED
+              - FAILED or
+              - DELETING
+        - List of `resources` (objects) that this release consists of, sorted by kind,
+          and the status of those resources
+        - Last `deployment_time`.
 
+        """
         self.log.debug(
             "status_kdu: cluster_uuid: {}, kdu_instance: {}".format(
                 cluster_uuid, kdu_instance
@@ -760,15 +886,18 @@ class K8sHelmBaseConnector(K8sConnector):
                 break
         else:
             # instance does not exist
-            raise K8sException("Instance name: {} not found in cluster: {}".format(
-                kdu_instance, cluster_id))
+            raise K8sException(
+                "Instance name: {} not found in cluster: {}".format(
+                    kdu_instance, cluster_id
+                )
+            )
 
         status = await self._status_kdu(
             cluster_id=cluster_id,
             kdu_instance=kdu_instance,
             namespace=instance["namespace"],
+            yaml_format=yaml_format,
             show_error_log=True,
-            return_text=True,
         )
 
         # sync fs
@@ -777,7 +906,6 @@ class K8sHelmBaseConnector(K8sConnector):
         return status
 
     async def values_kdu(self, kdu_model: str, repo_url: str = None) -> str:
-
         self.log.debug(
             "inspect kdu_model values {} from (optional) repo: {}".format(
                 kdu_model, repo_url
@@ -789,7 +917,6 @@ class K8sHelmBaseConnector(K8sConnector):
         )
 
     async def help_kdu(self, kdu_model: str, repo_url: str = None) -> str:
-
         self.log.debug(
             "inspect kdu_model {} readme.md from repo: {}".format(kdu_model, repo_url)
         )
@@ -799,7 +926,6 @@ class K8sHelmBaseConnector(K8sConnector):
         )
 
     async def synchronize_repos(self, cluster_uuid: str):
-
         self.log.debug("synchronize repos for cluster helm-id: {}".format(cluster_uuid))
         try:
             db_repo_ids = self._get_helm_chart_repos_ids(cluster_uuid)
@@ -820,14 +946,19 @@ class K8sHelmBaseConnector(K8sConnector):
                     repo_id = db_repo.get("_id")
                     if curr_repo_url != db_repo["url"]:
                         if curr_repo_url:
-                            self.log.debug("repo {} url changed, delete and and again".format(
-                                db_repo["url"]))
+                            self.log.debug(
+                                "repo {} url changed, delete and and again".format(
+                                    db_repo["url"]
+                                )
+                            )
                             await self.repo_remove(cluster_uuid, db_repo["name"])
                             deleted_repo_list.append(repo_id)
 
                         # add repo
                         self.log.debug("add repo {}".format(db_repo["name"]))
-                        await self.repo_add(cluster_uuid, db_repo["name"], db_repo["url"])
+                        await self.repo_add(
+                            cluster_uuid, db_repo["name"], db_repo["url"]
+                        )
                         added_repo_dict[repo_id] = db_repo["name"]
                 except Exception as e:
                     raise K8sException(
@@ -896,47 +1027,76 @@ class K8sHelmBaseConnector(K8sConnector):
         """
 
     @abc.abstractmethod
-    async def _get_services(self, cluster_id, kdu_instance, namespace):
+    async def _get_services(self, cluster_id, kdu_instance, namespace, kubeconfig):
         """
         Implements the helm version dependent method to obtain services from a helm instance
         """
 
     @abc.abstractmethod
-    async def _status_kdu(self, cluster_id: str, kdu_instance: str, namespace: str = None,
-                          show_error_log: bool = False, return_text: bool = False):
+    async def _status_kdu(
+        self,
+        cluster_id: str,
+        kdu_instance: str,
+        namespace: str = None,
+        yaml_format: bool = False,
+        show_error_log: bool = False,
+    ) -> Union[str, dict]:
         """
         Implements the helm version dependent method to obtain status of a helm instance
         """
 
     @abc.abstractmethod
-    def _get_install_command(self, kdu_model, kdu_instance, namespace,
-                             params_str, version, atomic, timeout) -> str:
+    def _get_install_command(
+        self,
+        kdu_model,
+        kdu_instance,
+        namespace,
+        params_str,
+        version,
+        atomic,
+        timeout,
+        kubeconfig,
+    ) -> str:
         """
         Obtain command to be executed to delete the indicated instance
         """
 
     @abc.abstractmethod
-    def _get_upgrade_command(self, kdu_model, kdu_instance, namespace,
-                             params_str, version, atomic, timeout) -> str:
+    def _get_upgrade_command(
+        self,
+        kdu_model,
+        kdu_instance,
+        namespace,
+        params_str,
+        version,
+        atomic,
+        timeout,
+        kubeconfig,
+    ) -> str:
         """
         Obtain command to be executed to upgrade the indicated instance
         """
 
     @abc.abstractmethod
-    def _get_rollback_command(self, kdu_instance, namespace, revision) -> str:
+    def _get_rollback_command(
+        self, kdu_instance, namespace, revision, kubeconfig
+    ) -> str:
         """
         Obtain command to be executed to rollback the indicated instance
         """
 
     @abc.abstractmethod
-    def _get_uninstall_command(self, kdu_instance: str, namespace: str) -> str:
+    def _get_uninstall_command(
+        self, kdu_instance: str, namespace: str, kubeconfig: str
+    ) -> str:
         """
         Obtain command to be executed to delete the indicated instance
         """
 
     @abc.abstractmethod
-    def _get_inspect_command(self, show_command: str, kdu_model: str, repo_str: str,
-                             version: str):
+    def _get_inspect_command(
+        self, show_command: str, kdu_model: str, repo_str: str, version: str
+    ):
         """
         Obtain command to be executed to obtain information about the kdu
         """
@@ -1052,38 +1212,24 @@ class K8sHelmBaseConnector(K8sConnector):
         of dictionaries
         """
         new_list = []
-        for dictionary in input_list:
-            new_dict = dict((k.lower(), v) for k, v in dictionary.items())
-            new_list.append(new_dict)
+        if input_list:
+            for dictionary in input_list:
+                new_dict = dict((k.lower(), v) for k, v in dictionary.items())
+                new_list.append(new_dict)
         return new_list
 
-    def _local_exec(self, command: str) -> (str, int):
-        command = self._remove_multiple_spaces(command)
-        self.log.debug("Executing sync local command: {}".format(command))
-        # raise exception if fails
-        output = ""
-        try:
-            output = subprocess.check_output(
-                command, shell=True, universal_newlines=True
-            )
-            return_code = 0
-            self.log.debug(output)
-        except Exception:
-            return_code = 1
-
-        return output, return_code
-
     async def _local_async_exec(
         self,
         command: str,
         raise_exception_on_error: bool = False,
         show_error_log: bool = True,
         encode_utf8: bool = False,
-        env: dict = None
+        env: dict = None,
     ) -> (str, int):
-
         command = K8sHelmBaseConnector._remove_multiple_spaces(command)
-        self.log.debug("Executing async local command: {}, env: {}".format(command, env))
+        self.log.debug(
+            "Executing async local command: {}, env: {}".format(command, env)
+        )
 
         # split command
         command = shlex.split(command)
@@ -1094,8 +1240,10 @@ class K8sHelmBaseConnector(K8sConnector):
 
         try:
             process = await asyncio.create_subprocess_exec(
-                *command, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE,
-                env=environ
+                *command,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE,
+                env=environ,
             )
 
             # wait for command terminate
@@ -1139,18 +1287,21 @@ class K8sHelmBaseConnector(K8sConnector):
             else:
                 return "", -1
 
-    async def _local_async_exec_pipe(self,
-                                     command1: str,
-                                     command2: str,
-                                     raise_exception_on_error: bool = True,
-                                     show_error_log: bool = True,
-                                     encode_utf8: bool = False,
-                                     env: dict = None):
-
+    async def _local_async_exec_pipe(
+        self,
+        command1: str,
+        command2: str,
+        raise_exception_on_error: bool = True,
+        show_error_log: bool = True,
+        encode_utf8: bool = False,
+        env: dict = None,
+    ):
         command1 = K8sHelmBaseConnector._remove_multiple_spaces(command1)
         command2 = K8sHelmBaseConnector._remove_multiple_spaces(command2)
         command = "{} | {}".format(command1, command2)
-        self.log.debug("Executing async local command: {}, env: {}".format(command, env))
+        self.log.debug(
+            "Executing async local command: {}, env: {}".format(command, env)
+        )
 
         # split command
         command1 = shlex.split(command1)
@@ -1164,9 +1315,9 @@ class K8sHelmBaseConnector(K8sConnector):
             read, write = os.pipe()
             await asyncio.create_subprocess_exec(*command1, stdout=write, env=environ)
             os.close(write)
-            process_2 = await asyncio.create_subprocess_exec(*command2, stdin=read,
-                                                             stdout=asyncio.subprocess.PIPE,
-                                                             env=environ)
+            process_2 = await asyncio.create_subprocess_exec(
+                *command2, stdin=read, stdout=asyncio.subprocess.PIPE, env=environ
+            )
             os.close(read)
             stdout, stderr = await process_2.communicate()
 
@@ -1242,7 +1393,7 @@ class K8sHelmBaseConnector(K8sConnector):
             "name": service_name,
             "type": self._get_deep(data, ("spec", "type")),
             "ports": self._get_deep(data, ("spec", "ports")),
-            "cluster_ip": self._get_deep(data, ("spec", "clusterIP"))
+            "cluster_ip": self._get_deep(data, ("spec", "clusterIP")),
         }
         if service["type"] == "LoadBalancer":
             ip_map_list = self._get_deep(data, ("status", "loadBalancer", "ingress"))
@@ -1274,7 +1425,9 @@ class K8sHelmBaseConnector(K8sConnector):
                 version = "--version {}".format(str(parts[1]))
                 kdu_model = parts[0]
 
-        full_command = self._get_inspect_command(inspect_command, kdu_model, repo_str, version)
+        full_command = self._get_inspect_command(
+            inspect_command, kdu_model, repo_str, version
+        )
         output, _rc = await self._local_async_exec(
             command=full_command, encode_utf8=True
         )
@@ -1287,47 +1440,57 @@ class K8sHelmBaseConnector(K8sConnector):
         operation: str,
         kdu_instance: str,
         namespace: str = None,
-        check_every: float = 10,
         db_dict: dict = None,
-        run_once: bool = False,
-    ):
-        while True:
-            try:
-                await asyncio.sleep(check_every)
-                detailed_status = await self._status_kdu(
-                    cluster_id=cluster_id, kdu_instance=kdu_instance, namespace=namespace,
-                    return_text=False
-                )
-                status = detailed_status.get("info").get("description")
-                self.log.debug('KDU {} STATUS: {}.'.format(kdu_instance, status))
-                # write status to db
-                result = await self.write_app_status_to_db(
-                    db_dict=db_dict,
-                    status=str(status),
-                    detailed_status=str(detailed_status),
-                    operation=operation,
-                )
-                if not result:
-                    self.log.info("Error writing in database. Task exiting...")
-                    return
-            except asyncio.CancelledError:
-                self.log.debug("Task cancelled")
-                return
-            except Exception as e:
-                self.log.debug("_store_status exception: {}".format(str(e)), exc_info=True)
-                pass
-            finally:
-                if run_once:
-                    return
+    ) -> None:
+        """
+        Obtains the status of the KDU instance based on Helm Charts, and stores it in the database.
+
+        :param cluster_id (str): the cluster where the KDU instance is deployed
+        :param operation (str): The operation related to the status to be updated (for instance, "install" or "upgrade")
+        :param kdu_instance (str): The KDU instance in relation to which the status is obtained
+        :param namespace (str): The Kubernetes namespace where the KDU instance was deployed. Defaults to None
+        :param db_dict (dict): A dictionary with the database necessary information. It shall contain the
+        values for the keys:
+            - "collection": The Mongo DB collection to write to
+            - "filter": The query filter to use in the update process
+            - "path": The dot separated keys which targets the object to be updated
+        Defaults to None.
+        """
+
+        try:
+            detailed_status = await self._status_kdu(
+                cluster_id=cluster_id,
+                kdu_instance=kdu_instance,
+                yaml_format=False,
+                namespace=namespace,
+            )
+
+            status = detailed_status.get("info").get("description")
+            self.log.debug(f"Status for KDU {kdu_instance} obtained: {status}.")
+
+            # write status to db
+            result = await self.write_app_status_to_db(
+                db_dict=db_dict,
+                status=str(status),
+                detailed_status=str(detailed_status),
+                operation=operation,
+            )
+
+            if not result:
+                self.log.info("Error writing in database. Task exiting...")
+
+        except asyncio.CancelledError as e:
+            self.log.warning(
+                f"Exception in method {self._store_status.__name__} (task cancelled): {e}"
+            )
+        except Exception as e:
+            self.log.warning(f"Exception in method {self._store_status.__name__}: {e}")
 
     # params for use in -f file
     # returns values file option and filename (in order to delete it at the end)
     def _params_to_file_option(self, cluster_id: str, params: dict) -> (str, str):
-
         if params and len(params) > 0:
-            self._init_paths_env(
-                cluster_name=cluster_id, create_if_not_exist=True
-            )
+            self._init_paths_env(cluster_name=cluster_id, create_if_not_exist=True)
 
             def get_random_number():
                 r = random.randrange(start=1, stop=99999999)
@@ -1369,15 +1532,16 @@ class K8sHelmBaseConnector(K8sConnector):
         return params_str
 
     @staticmethod
-    def _generate_release_name(chart_name: str):
+    def generate_kdu_instance_name(**kwargs):
+        chart_name = kwargs["kdu_model"]
         # check embeded chart (file or dir)
         if chart_name.startswith("/"):
             # extract file or directory name
-            chart_name = chart_name[chart_name.rfind("/") + 1:]
+            chart_name = chart_name[chart_name.rfind("/") + 1 :]
         # check URL
         elif "://" in chart_name:
             # extract last portion of URL
-            chart_name = chart_name[chart_name.rfind("/") + 1:]
+            chart_name = chart_name[chart_name.rfind("/") + 1 :]
 
         name = ""
         for c in chart_name:
@@ -1402,3 +1566,10 @@ class K8sHelmBaseConnector(K8sConnector):
 
         name = name + get_random_number()
         return name.lower()
+
+    def _split_repo(self, kdu_model: str) -> str:
+        repo_name = None
+        idx = kdu_model.find("/")
+        if idx >= 0:
+            repo_name = kdu_model[:idx]
+        return repo_name