def delete_nodes():
""" Delete all nodes from restored cluster.
When restoring cluster after a full crush it makes sense to drop nodes
from restored db because they will be added again (re-deployed). This also
implies purging of the pods - in this case they also need to be re-deployed
(or restored from pod backups)
"""
from kubedock.core import db
from kubedock.api import create_app
from kubedock.pods.models import PersistentDisk, Pod, PodIP
from kubedock.usage.models import IpState, ContainerState, PodState
from kubedock.domains.models import PodDomain
from kubedock.nodes.models import Node
from kubedock.kapi.nodes import delete_node_from_db
create_app(fake_sessions=True).app_context().push()
IpState.query.delete()
PodIP.query.delete()
ContainerState.query.delete()
PodDomain.query.delete()
PersistentDisk.query.delete()
PodState.query.delete()
Pod.query.delete()
logger.info("All pod data purged.")
db.session.commit()
devnull = open(os.devnull, 'w')
subprocess.call(['kubectl', 'delete', '--all', 'namespaces'],
stderr=devnull,
stdout=devnull)
subprocess.call(['kubectl', 'delete', '--all', 'nodes'],
stderr=devnull,
stdout=devnull)
logger.info("Etcd data purged.")
for node in Node.get_all():
delete_node_from_db(node)
logger.info("Node `{0}` purged.".format(node.hostname))
def fetch_nodes():
"""
Gets basic nodes data: IP address, cpu cores and memory
"""
return [{'_ip': node.ip} for node in Node.get_all()]