X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FN2VC.git;a=blobdiff_plain;f=n2vc%2Fk8s_helm_conn.py;h=d3fbed667d4abafce9429b8ad34cf1a22e91abb3;hp=2b15d76151bfecd9c1c4872fd2a3308354a858e7;hb=fc796cc98009d16e124dd47c0596c5541dc10f4d;hpb=43c2e79e783aa65dba1234ae4c299944c5f1702e

diff --git a/n2vc/k8s_helm_conn.py b/n2vc/k8s_helm_conn.py
index 2b15d76..d3fbed6 100644
--- a/n2vc/k8s_helm_conn.py
+++ b/n2vc/k8s_helm_conn.py
@@ -20,7 +20,6 @@
 # contact with: nfvlabs@tid.es
 ##
 
-import paramiko
 import subprocess
 import os
 import shutil
@@ -30,6 +29,7 @@ import yaml
 from uuid import uuid4
 import random
 from n2vc.k8s_conn import K8sConnector
+from n2vc.exceptions import K8sException
 
 
 class K8sHelmConnector(K8sConnector):
@@ -67,7 +67,7 @@ class K8sHelmConnector(K8sConnector):
             on_update_db=on_update_db
         )
 
-        self.info('Initializing K8S Helm connector')
+        self.log.info('Initializing K8S Helm connector')
 
         # random numbers for release name generation
         random.seed(time.time())
@@ -84,7 +84,7 @@ class K8sHelmConnector(K8sConnector):
         self._check_file_exists(filename=helm_command, exception_if_not_exists=True)
 
         # initialize helm client-only
-        self.debug('Initializing helm client-only...')
+        self.log.debug('Initializing helm client-only...')
         command = '{} init --client-only'.format(self._helm_command)
         try:
             asyncio.ensure_future(self._local_async_exec(command=command, raise_exception_on_error=False))
@@ -93,7 +93,7 @@ class K8sHelmConnector(K8sConnector):
         except Exception as e:
             self.warning(msg='helm init failed (it was already initialized): {}'.format(e))
 
-        self.info('K8S Helm connector initialized')
+        self.log.info('K8S Helm connector initialized')
 
     async def init_env(
             self,
@@ -101,12 +101,23 @@ class K8sHelmConnector(K8sConnector):
             namespace: str = 'kube-system',
             reuse_cluster_uuid=None
     ) -> (str, bool):
+        """
+        It prepares a given K8s cluster environment to run Charts on both sides:
+            client (OSM)
+            server (Tiller)
+
+        :param k8s_creds: credentials to access a given K8s cluster, i.e. a valid '.kube/config'
+        :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
+        :return: uuid of the K8s cluster and True if connector has installed some software in the cluster
+        (on error, an exception will be raised)
+        """
 
         cluster_uuid = reuse_cluster_uuid
         if not cluster_uuid:
             cluster_uuid = str(uuid4())
 
-        self.debug('Initializing K8S environment. namespace: {}'.format(namespace))
+        self.log.debug('Initializing K8S environment. namespace: {}'.format(namespace))
 
         # create config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -135,7 +146,7 @@ class K8sHelmConnector(K8sConnector):
         # helm init
         n2vc_installed_sw = False
         if not already_initialized:
-            self.info('Initializing helm in client and server: {}'.format(cluster_uuid))
+            self.log.info('Initializing helm in client and server: {}'.format(cluster_uuid))
             command = '{} --kubeconfig={} --tiller-namespace={} --home={} init'\
                 .format(self._helm_command, config_filename, namespace, helm_dir)
             output, rc = await self._local_async_exec(command=command, raise_exception_on_error=True)
@@ -144,14 +155,14 @@ class K8sHelmConnector(K8sConnector):
             # check client helm installation
             check_file = helm_dir + '/repository/repositories.yaml'
             if not self._check_file_exists(filename=check_file, exception_if_not_exists=False):
-                self.info('Initializing helm in client: {}'.format(cluster_uuid))
+                self.log.info('Initializing helm in client: {}'.format(cluster_uuid))
                 command = '{} --kubeconfig={} --tiller-namespace={} --home={} init --client-only'\
                     .format(self._helm_command, config_filename, namespace, helm_dir)
                 output, rc = await self._local_async_exec(command=command, raise_exception_on_error=True)
             else:
-                self.info('Helm client already initialized')
+                self.log.info('Helm client already initialized')
 
-        self.info('Cluster initialized {}'.format(cluster_uuid))
+        self.log.info('Cluster initialized {}'.format(cluster_uuid))
 
         return cluster_uuid, n2vc_installed_sw
 
@@ -163,7 +174,7 @@ class K8sHelmConnector(K8sConnector):
             repo_type: str = 'chart'
     ):
 
-        self.debug('adding {} repository {}. URL: {}'.format(repo_type, name, url))
+        self.log.debug('adding {} repository {}. URL: {}'.format(repo_type, name, url))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -171,13 +182,13 @@ class K8sHelmConnector(K8sConnector):
 
         # helm repo update
         command = '{} --kubeconfig={} --home={} repo update'.format(self._helm_command, config_filename, helm_dir)
-        self.debug('updating repo: {}'.format(command))
+        self.log.debug('updating repo: {}'.format(command))
         await self._local_async_exec(command=command, raise_exception_on_error=False)
 
         # helm repo add name url
         command = '{} --kubeconfig={} --home={} repo add {} {}'\
             .format(self._helm_command, config_filename, helm_dir, name, url)
-        self.debug('adding repo: {}'.format(command))
+        self.log.debug('adding repo: {}'.format(command))
         await self._local_async_exec(command=command, raise_exception_on_error=True)
 
     async def repo_list(
@@ -190,7 +201,7 @@ class K8sHelmConnector(K8sConnector):
         :return: list of registered repositories: [ (name, url) .... ]
         """
 
-        self.debug('list repositories for cluster {}'.format(cluster_uuid))
+        self.log.debug('list repositories for cluster {}'.format(cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -218,7 +229,7 @@ class K8sHelmConnector(K8sConnector):
         :return: True if successful
         """
 
-        self.debug('list repositories for cluster {}'.format(cluster_uuid))
+        self.log.debug('list repositories for cluster {}'.format(cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -236,7 +247,7 @@ class K8sHelmConnector(K8sConnector):
             uninstall_sw: bool = False
     ) -> bool:
 
-        self.debug('Resetting K8s environment. cluster uuid: {}'.format(cluster_uuid))
+        self.log.debug('Resetting K8s environment. cluster uuid: {}'.format(cluster_uuid))
 
         # get kube and helm directories
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -250,19 +261,19 @@ class K8sHelmConnector(K8sConnector):
                     try:
                         kdu_instance = r.get('Name')
                         chart = r.get('Chart')
-                        self.debug('Uninstalling {} -> {}'.format(chart, kdu_instance))
+                        self.log.debug('Uninstalling {} -> {}'.format(chart, kdu_instance))
                         await self.uninstall(cluster_uuid=cluster_uuid, kdu_instance=kdu_instance)
                     except Exception as e:
-                        self.error('Error uninstalling release {}: {}'.format(kdu_instance, e))
+                        self.log.error('Error uninstalling release {}: {}'.format(kdu_instance, e))
             else:
                 msg = 'Cluster has releases and not force. Cannot reset K8s environment. Cluster uuid: {}'\
                     .format(cluster_uuid)
-                self.error(msg)
-                raise Exception(msg)
+                self.log.error(msg)
+                raise K8sException(msg)
 
         if uninstall_sw:
 
-            self.debug('Uninstalling tiller from cluster {}'.format(cluster_uuid))
+            self.log.debug('Uninstalling tiller from cluster {}'.format(cluster_uuid))
 
             # find namespace for tiller pod
             command = '{} --kubeconfig={} get deployments --all-namespaces'\
@@ -279,32 +290,31 @@ class K8sHelmConnector(K8sConnector):
                     pass
             else:
                 msg = 'Tiller deployment not found in cluster {}'.format(cluster_uuid)
-                self.error(msg)
-                # raise Exception(msg)
+                self.log.error(msg)
 
-            self.debug('namespace for tiller: {}'.format(namespace))
+            self.log.debug('namespace for tiller: {}'.format(namespace))
 
             force_str = '--force'
 
             if namespace:
                 # delete tiller deployment
-                self.debug('Deleting tiller deployment for cluster {}, namespace {}'.format(cluster_uuid, namespace))
+                self.log.debug('Deleting tiller deployment for cluster {}, namespace {}'.format(cluster_uuid, namespace))
                 command = '{} --namespace {} --kubeconfig={} {} delete deployment tiller-deploy'\
                     .format(self.kubectl_command, namespace, config_filename, force_str)
                 await self._local_async_exec(command=command, raise_exception_on_error=False)
 
                 # uninstall tiller from cluster
-                self.debug('Uninstalling tiller from cluster {}'.format(cluster_uuid))
+                self.log.debug('Uninstalling tiller from cluster {}'.format(cluster_uuid))
                 command = '{} --kubeconfig={} --home={} reset'\
                     .format(self._helm_command, config_filename, helm_dir)
-                self.debug('resetting: {}'.format(command))
+                self.log.debug('resetting: {}'.format(command))
                 output, rc = await self._local_async_exec(command=command, raise_exception_on_error=True)
             else:
-                self.debug('namespace not found')
+                self.log.debug('namespace not found')
 
         # delete cluster directory
         dir = self.fs.path + '/' + cluster_uuid
-        self.debug('Removing directory {}'.format(dir))
+        self.log.debug('Removing directory {}'.format(dir))
         shutil.rmtree(dir, ignore_errors=True)
 
         return True
@@ -316,10 +326,12 @@ class K8sHelmConnector(K8sConnector):
             atomic: bool = True,
             timeout: float = 300,
             params: dict = None,
-            db_dict: dict = None
+            db_dict: dict = None,
+            kdu_name: str = None,
+            namespace: str = None
     ):
 
-        self.debug('installing {} in cluster {}'.format(kdu_model, cluster_uuid))
+        self.log.debug('installing {} in cluster {}'.format(kdu_model, cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -337,6 +349,10 @@ class K8sHelmConnector(K8sConnector):
         atomic_str = ''
         if atomic:
             atomic_str = '--atomic'
+        # namespace
+        namespace_str = ''
+        if namespace:
+            namespace_str = "--namespace {}".format(namespace)
 
         # version
         version_str = ''
@@ -346,7 +362,7 @@ class K8sHelmConnector(K8sConnector):
                 version_str = '--version {}'.format(parts[1])
                 kdu_model = parts[0]
 
-        # generate a name for the releas. Then, check if already exists
+        # generate a name for the release. Then, check if already exists
         kdu_instance = None
         while kdu_instance is None:
             kdu_instance = K8sHelmConnector._generate_release_name(kdu_model)
@@ -359,20 +375,23 @@ class K8sHelmConnector(K8sConnector):
                 if result is not None:
                     # instance already exists: generate a new one
                     kdu_instance = None
-            except Exception as e:
-                kdu_instance = None
+            except K8sException:
+                pass
 
         # helm repo install
-        command = '{} install {} --output yaml --kubeconfig={} --home={} {} {} --name={} {} {}'\
-            .format(self._helm_command, atomic_str, config_filename, helm_dir,
-                    params_str, timeout_str, kdu_instance, kdu_model, version_str)
-        self.debug('installing: {}'.format(command))
+        command = '{helm} install {atomic} --output yaml --kubeconfig={config} --home={dir} {params} {timeout} ' \
+                  '--name={name} {ns} {model} {ver}'.format(helm=self._helm_command, atomic=atomic_str,
+                                                            config=config_filename, dir=helm_dir, params=params_str,
+                                                            timeout=timeout_str, name=kdu_instance, ns=namespace_str,
+                                                            model=kdu_model, ver=version_str)
+        self.log.debug('installing: {}'.format(command))
 
         if atomic:
             # exec helm in a task
             exec_task = asyncio.ensure_future(
                 coro_or_future=self._local_async_exec(command=command, raise_exception_on_error=False)
             )
+
             # write status in another task
             status_task = asyncio.ensure_future(
                 coro_or_future=self._store_status(
@@ -412,10 +431,10 @@ class K8sHelmConnector(K8sConnector):
 
         if rc != 0:
             msg = 'Error executing command: {}\nOutput: {}'.format(command, output)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
-        self.debug('Returning kdu_instance {}'.format(kdu_instance))
+        self.log.debug('Returning kdu_instance {}'.format(kdu_instance))
         return kdu_instance
 
     async def instances_list(
@@ -429,7 +448,7 @@ class K8sHelmConnector(K8sConnector):
         :return:
         """
 
-        self.debug('list releases for cluster {}'.format(cluster_uuid))
+        self.log.debug('list releases for cluster {}'.format(cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -456,7 +475,7 @@ class K8sHelmConnector(K8sConnector):
             db_dict: dict = None
     ):
 
-        self.debug('upgrading {} in cluster {}'.format(kdu_model, cluster_uuid))
+        self.log.debug('upgrading {} in cluster {}'.format(kdu_model, cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -487,7 +506,7 @@ class K8sHelmConnector(K8sConnector):
         command = '{} upgrade {} --output yaml --kubeconfig={} --home={} {} {} {} {} {}'\
             .format(self._helm_command, atomic_str, config_filename, helm_dir,
                     params_str, timeout_str, kdu_instance, kdu_model, version_str)
-        self.debug('upgrading: {}'.format(command))
+        self.log.debug('upgrading: {}'.format(command))
 
         if atomic:
 
@@ -533,14 +552,14 @@ class K8sHelmConnector(K8sConnector):
 
         if rc != 0:
             msg = 'Error executing command: {}\nOutput: {}'.format(command, output)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
         # return new revision number
         instance = await self.get_instance_info(cluster_uuid=cluster_uuid, kdu_instance=kdu_instance)
         if instance:
             revision = int(instance.get('Revision'))
-            self.debug('New revision: {}'.format(revision))
+            self.log.debug('New revision: {}'.format(revision))
             return revision
         else:
             return 0
@@ -553,7 +572,7 @@ class K8sHelmConnector(K8sConnector):
             db_dict: dict = None
     ):
 
-        self.debug('rollback kdu_instance {} to revision {} from cluster {}'
+        self.log.debug('rollback kdu_instance {} to revision {} from cluster {}'
                    .format(kdu_instance, revision, cluster_uuid))
 
         # config filename
@@ -598,14 +617,14 @@ class K8sHelmConnector(K8sConnector):
 
         if rc != 0:
             msg = 'Error executing command: {}\nOutput: {}'.format(command, output)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
         # return new revision number
         instance = await self.get_instance_info(cluster_uuid=cluster_uuid, kdu_instance=kdu_instance)
         if instance:
             revision = int(instance.get('Revision'))
-            self.debug('New revision: {}'.format(revision))
+            self.log.debug('New revision: {}'.format(revision))
             return revision
         else:
             return 0
@@ -624,7 +643,7 @@ class K8sHelmConnector(K8sConnector):
         :return: True if successful
         """
 
-        self.debug('uninstall kdu_instance {} from cluster {}'.format(kdu_instance, cluster_uuid))
+        self.log.debug('uninstall kdu_instance {} from cluster {}'.format(kdu_instance, cluster_uuid))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -637,13 +656,36 @@ class K8sHelmConnector(K8sConnector):
 
         return self._output_to_table(output)
 
+    async def exec_primitive(
+        self,
+        cluster_uuid: str = None,
+        kdu_instance: str = None,
+        primitive_name: str = None,
+        timeout: float = 300,
+        params: dict = None,
+        db_dict: dict = None,
+    ) -> str:
+        """Exec primitive (Juju action)
+
+        :param cluster_uuid str: The UUID of the cluster
+        :param kdu_instance str: The unique name of the KDU instance
+        :param primitive_name: Name of action that will be executed
+        :param timeout: Timeout for action execution
+        :param params: Dictionary of all the parameters needed for the action
+        :db_dict: Dictionary for any additional data
+
+        :return: Returns the output of the action
+        """
+        raise K8sException("KDUs deployed with Helm don't support actions "
+                           "different from rollback, upgrade and status")
+
     async def inspect_kdu(
             self,
             kdu_model: str,
             repo_url: str = None
     ) -> str:
 
-        self.debug('inspect kdu_model {} from (optional) repo: {}'.format(kdu_model, repo_url))
+        self.log.debug('inspect kdu_model {} from (optional) repo: {}'.format(kdu_model, repo_url))
 
         return await self._exec_inspect_comand(inspect_command='', kdu_model=kdu_model, repo_url=repo_url)
 
@@ -653,7 +695,7 @@ class K8sHelmConnector(K8sConnector):
             repo_url: str = None
     ) -> str:
 
-        self.debug('inspect kdu_model values {} from (optional) repo: {}'.format(kdu_model, repo_url))
+        self.log.debug('inspect kdu_model values {} from (optional) repo: {}'.format(kdu_model, repo_url))
 
         return await self._exec_inspect_comand(inspect_command='values', kdu_model=kdu_model, repo_url=repo_url)
 
@@ -663,7 +705,7 @@ class K8sHelmConnector(K8sConnector):
             repo_url: str = None
     ) -> str:
 
-        self.debug('inspect kdu_model {} readme.md from repo: {}'.format(kdu_model, repo_url))
+        self.log.debug('inspect kdu_model {} readme.md from repo: {}'.format(kdu_model, repo_url))
 
         return await self._exec_inspect_comand(inspect_command='readme', kdu_model=kdu_model, repo_url=repo_url)
 
@@ -681,6 +723,72 @@ class K8sHelmConnector(K8sConnector):
             return_text=True
         )
 
+    async def synchronize_repos(self, cluster_uuid: str):
+
+        self.log.debug("syncronize repos for cluster helm-id: {}",)
+        try:
+            update_repos_timeout = 300 # max timeout to sync a single repos, more than this is too much
+            db_k8scluster = self.db.get_one("k8sclusters", {"_admin.helm-chart.id": cluster_uuid})
+            if db_k8scluster:
+                nbi_repo_list = db_k8scluster.get("_admin").get("helm_chart_repos") or []
+                cluster_repo_dict = db_k8scluster.get("_admin").get("helm_charts_added") or {}
+                # elements that must be deleted
+                deleted_repo_list = []
+                added_repo_dict = {}
+                self.log.debug("helm_chart_repos: {}".format(nbi_repo_list))
+                self.log.debug("helm_charts_added: {}".format(cluster_repo_dict))
+
+                # obtain repos to add: registered by nbi but not added
+                repos_to_add = [repo for repo in nbi_repo_list if not cluster_repo_dict.get(repo)]
+
+                # obtain repos to delete: added by cluster but not in nbi list
+                repos_to_delete = [repo for repo in cluster_repo_dict.keys() if repo not in nbi_repo_list]
+
+                # delete repos: must delete first then add because there may be different repos with same name but
+                # different id and url
+                self.log.debug("repos to delete: {}".format(repos_to_delete))
+                for repo_id in repos_to_delete:
+                    # try to delete repos
+                    try:
+                        repo_delete_task = asyncio.ensure_future(self.repo_remove(cluster_uuid=cluster_uuid,
+                                                                                  name=cluster_repo_dict[repo_id]))
+                        await asyncio.wait_for(repo_delete_task, update_repos_timeout)
+                    except Exception as e:
+                        self.warning("Error deleting repo, id: {}, name: {}, err_msg: {}".format(repo_id,
+                                cluster_repo_dict[repo_id], str(e)))
+                    # always add to the list of to_delete if there is an error because if is not there deleting raises error
+                    deleted_repo_list.append(repo_id)
+
+                # add repos
+                self.log.debug("repos to add: {}".format(repos_to_add))
+                add_task_list = []
+                for repo_id in repos_to_add:
+                    # obtain the repo data from the db
+                    # if there is an error getting the repo in the database we will ignore this repo and continue
+                    # because there is a possible race condition where the repo has been deleted while processing
+                    db_repo = self.db.get_one("k8srepos", {"_id": repo_id})
+                    self.log.debug("obtained repo: id, {}, name: {}, url: {}".format(repo_id, db_repo["name"], db_repo["url"]))
+                    try:
+                        repo_add_task = asyncio.ensure_future(self.repo_add(cluster_uuid=cluster_uuid,
+                                                         name=db_repo["name"], url=db_repo["url"],
+                                                         repo_type="chart"))
+                        await asyncio.wait_for(repo_add_task, update_repos_timeout)
+                        added_repo_dict[repo_id] = db_repo["name"]
+                        self.log.debug("added repo: id, {}, name: {}".format(repo_id, db_repo["name"]))
+                    except Exception as e:
+                        # deal with error adding repo, adding a repo that already exists does not raise any error
+                        # will not raise error because a wrong repos added by anyone could prevent instantiating any ns
+                        self.log.error("Error adding repo id: {}, err_msg: {} ".format(repo_id, repr(e)))
+
+                return deleted_repo_list, added_repo_dict
+
+            else: # else db_k8scluster does not exist
+                raise K8sException("k8cluster with helm-id : {} not found".format(cluster_uuid))
+
+        except Exception as e:
+            self.log.error("Error synchronizing repos: {}".format(str(e)))
+            raise K8sException("Error synchronizing repos")
+
     """
     ##################################################################################################
     ########################################## P R I V A T E #########################################
@@ -715,7 +823,7 @@ class K8sHelmConnector(K8sConnector):
             return_text: bool = False
     ):
 
-        self.debug('status of kdu_instance {}'.format(kdu_instance))
+        self.log.debug('status of kdu_instance {}'.format(kdu_instance))
 
         # config filename
         kube_dir, helm_dir, config_filename, cluster_dir = \
@@ -763,13 +871,22 @@ class K8sHelmConnector(K8sConnector):
         for instance in instances:
             if instance.get('Name') == kdu_instance:
                 return instance
-        self.debug('Instance {} not found'.format(kdu_instance))
+        self.log.debug('Instance {} not found'.format(kdu_instance))
         return None
 
     @staticmethod
     def _generate_release_name(
             chart_name: str
     ):
+        # check embeded chart (file or dir)
+        if chart_name.startswith('/'):
+            # extract file or directory name
+            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:]
+
         name = ''
         for c in chart_name:
             if c.isalpha() or c.isnumeric():
@@ -788,7 +905,7 @@ class K8sHelmConnector(K8sConnector):
         def get_random_number():
             r = random.randrange(start=1, stop=99999999)
             s = str(r)
-            s = s.rjust(width=10, fillchar=' ')
+            s = s.rjust(10, '0')
             return s
 
         name = name + get_random_number()
@@ -808,10 +925,8 @@ class K8sHelmConnector(K8sConnector):
                 await asyncio.sleep(check_every)
                 detailed_status = await self.status_kdu(cluster_uuid=cluster_uuid, kdu_instance=kdu_instance)
                 status = detailed_status.get('info').get('Description')
-                print('=' * 60)
-                self.debug('STATUS:\n{}'.format(status))
-                self.debug('DETAILED STATUS:\n{}'.format(detailed_status))
-                print('=' * 60)
+                self.log.debug('STATUS:\n{}'.format(status))
+                self.log.debug('DETAILED STATUS:\n{}'.format(detailed_status))
                 # write status to db
                 result = await self.write_app_status_to_db(
                     db_dict=db_dict,
@@ -819,12 +934,13 @@ class K8sHelmConnector(K8sConnector):
                     detailed_status=str(detailed_status),
                     operation=operation)
                 if not result:
-                    self.info('Error writing in database. Task exiting...')
+                    self.log.info('Error writing in database. Task exiting...')
                     return
             except asyncio.CancelledError:
-                self.debug('Task cancelled')
+                self.log.debug('Task cancelled')
                 return
             except Exception as e:
+                self.log.debug('_store_status exception: {}'.format(str(e)))
                 pass
             finally:
                 if run_once:
@@ -871,7 +987,7 @@ class K8sHelmConnector(K8sConnector):
                             current = int(parts[0])
                             total = int(parts[1])
                             if current < total:
-                                self.debug('NOT READY:\n    {}'.format(line3))
+                                self.log.debug('NOT READY:\n    {}'.format(line3))
                                 ready = False
                             line3 = resources[index]
                             index += 1
@@ -999,32 +1115,32 @@ class K8sHelmConnector(K8sConnector):
         # base dir for cluster
         cluster_dir = base + '/' + cluster_name
         if create_if_not_exist and not os.path.exists(cluster_dir):
-            self.debug('Creating dir {}'.format(cluster_dir))
+            self.log.debug('Creating dir {}'.format(cluster_dir))
             os.makedirs(cluster_dir)
         if not os.path.exists(cluster_dir):
             msg = 'Base cluster dir {} does not exist'.format(cluster_dir)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
         # kube dir
         kube_dir = cluster_dir + '/' + '.kube'
         if create_if_not_exist and not os.path.exists(kube_dir):
-            self.debug('Creating dir {}'.format(kube_dir))
+            self.log.debug('Creating dir {}'.format(kube_dir))
             os.makedirs(kube_dir)
         if not os.path.exists(kube_dir):
             msg = 'Kube config dir {} does not exist'.format(kube_dir)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
         # helm home dir
         helm_dir = cluster_dir + '/' + '.helm'
         if create_if_not_exist and not os.path.exists(helm_dir):
-            self.debug('Creating dir {}'.format(helm_dir))
+            self.log.debug('Creating dir {}'.format(helm_dir))
             os.makedirs(helm_dir)
         if not os.path.exists(helm_dir):
             msg = 'Helm config dir {} does not exist'.format(helm_dir)
-            self.error(msg)
-            raise Exception(msg)
+            self.log.error(msg)
+            raise K8sException(msg)
 
         config_filename = kube_dir + '/config'
         return kube_dir, helm_dir, config_filename, cluster_dir
@@ -1041,13 +1157,13 @@ class K8sHelmConnector(K8sConnector):
             command: str
     ) -> (str, int):
         command = K8sHelmConnector._remove_multiple_spaces(command)
-        self.debug('Executing sync local command: {}'.format(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.debug(output)
+            self.log.debug(output)
         except Exception as e:
             return_code = 1
 
@@ -1062,7 +1178,7 @@ class K8sHelmConnector(K8sConnector):
     ) -> (str, int):
 
         command = K8sHelmConnector._remove_multiple_spaces(command)
-        self.debug('Executing async local command: {}'.format(command))
+        self.log.debug('Executing async local command: {}'.format(command))
 
         # split command
         command = command.split(sep=' ')
@@ -1088,12 +1204,12 @@ class K8sHelmConnector(K8sConnector):
                 # output = stderr.decode()
 
             if return_code != 0 and show_error_log:
-                self.debug('Return code (FAIL): {}\nOutput:\n{}'.format(return_code, output))
+                self.log.debug('Return code (FAIL): {}\nOutput:\n{}'.format(return_code, output))
             else:
-                self.debug('Return code: {}'.format(return_code))
+                self.log.debug('Return code: {}'.format(return_code))
 
             if raise_exception_on_error and return_code != 0:
-                raise Exception(output)
+                raise K8sException(output)
 
             if encode_utf8:
                 output = output.encode('utf-8').strip()
@@ -1101,46 +1217,26 @@ class K8sHelmConnector(K8sConnector):
 
             return output, return_code
 
+        except asyncio.CancelledError:
+            raise
+        except K8sException:
+            raise
         except Exception as e:
             msg = 'Exception executing command: {} -> {}'.format(command, e)
-            if show_error_log:
-                self.error(msg)
-            return '', -1
-
-    def _remote_exec(
-            self,
-            hostname: str,
-            username: str,
-            password: str,
-            command: str,
-            timeout: int = 10
-    ) -> (str, int):
-
-        command = K8sHelmConnector._remove_multiple_spaces(command)
-        self.debug('Executing sync remote ssh command: {}'.format(command))
-
-        ssh = paramiko.SSHClient()
-        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
-        ssh.connect(hostname=hostname, username=username, password=password)
-        ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command(command=command, timeout=timeout)
-        output = ssh_stdout.read().decode('utf-8')
-        error = ssh_stderr.read().decode('utf-8')
-        if error:
-            self.error('ERROR: {}'.format(error))
-            return_code = 1
-        else:
-            return_code = 0
-        output = output.replace('\\n', '\n')
-        self.debug('OUTPUT: {}'.format(output))
-
-        return output, return_code
+            self.log.error(msg)
+            if raise_exception_on_error:
+                raise K8sException(e) from e
+            else:
+                return '', -1
 
     def _check_file_exists(self, filename: str, exception_if_not_exists: bool = False):
-        self.debug('Checking if file {} exists...'.format(filename))
+        # self.log.debug('Checking if file {} exists...'.format(filename))
         if os.path.exists(filename):
             return True
         else:
             msg = 'File {} does not exist'.format(filename)
             if exception_if_not_exists:
-                self.error(msg)
-                raise Exception(msg)
+                # self.log.error(msg)
+                raise K8sException(msg)
+
+