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import os
import tempfile
from glusto.core import Glusto as g
import six
import yaml
from openshiftstoragelibs.command import cmd_run
from openshiftstoragelibs.exceptions import (
ExecutionError,
NotSupportedException,
)
from openshiftstoragelibs.openshift_ops import (
cmd_run_on_gluster_pod_or_node,
oc_get_custom_resource)
from openshiftstoragelibs.openshift_version import get_openshift_version
from openshiftstoragelibs import waiter
MASTER_CONFIG_FILEPATH = "/etc/origin/master/master-config.yaml"
def validate_multipath_pod(hostname, podname, hacount, mpath):
"""Validate multipath for given app-pod.
Args:
hostname (str): ocp master node name
podname (str): app-pod name for which we need to validate
multipath. ex : nginx1
hacount (int): multipath count or HA count. ex: 3
mpath (str): multipath value to check
Returns:
bool: True if successful, otherwise raises exception
"""
pod_nodename_list = oc_get_custom_resource(
hostname, 'pod', custom=':.spec.nodeName', name=podname)
if not pod_nodename_list:
raise ExecutionError(
"Failed to get ip for pod from hostname {}".format(hostname))
pod_nodename = pod_nodename_list[0]
active_node_count, enable_node_count = (1, hacount - 1)
cmd = "multipath -ll %s | grep 'status=active' | wc -l" % mpath
active_count = int(cmd_run(cmd, pod_nodename))
assert active_node_count == active_count, (
"Active node count on %s for %s is %s and not 1" % (
pod_nodename, podname, active_count))
cmd = "multipath -ll %s | grep 'status=enabled' | wc -l" % mpath
enable_count = int(cmd_run(cmd, pod_nodename))
assert enable_node_count == enable_count, (
"Passive node count on %s for %s is %s and not %s" % (
pod_nodename, podname, enable_count, enable_node_count))
g.log.info("Validation of multipath for %s is successfull" % podname)
return True
def enable_pvc_resize(master_node):
'''
This function edits the /etc/origin/master/master-config.yaml
file - to enable pv_resize feature
and restarts atomic-openshift service on master node
Args:
master_node (str): hostname of masternode on which
want to edit the
master-config.yaml file
Returns:
bool: True if successful,
otherwise raise Exception
'''
version = get_openshift_version()
if version < "3.9":
msg = ("pv resize is not available in openshift "
"version %s " % version)
g.log.error(msg)
raise NotSupportedException(msg)
with tempfile.NamedTemporaryFile(delete=False) as temp:
temp_filename = temp.name
try:
g.download(master_node, MASTER_CONFIG_FILEPATH, temp_filename)
except Exception as e:
err_msg = (
"Failed to download '{}' from master node '{}' due to"
"exception\n{}".format(
MASTER_CONFIG_FILEPATH, master_node, six.text_type(e)))
raise ExecutionError(err_msg)
with open(temp_filename, 'r') as f:
data = yaml.load(f, Loader=yaml.FullLoader)
dict_add = data['admissionConfig']['pluginConfig']
if "PersistentVolumeClaimResize" in dict_add:
g.log.info("master-config.yaml file is already edited")
return True
dict_add['PersistentVolumeClaimResize'] = {
'configuration': {
'apiVersion': 'v1',
'disable': 'false',
'kind': 'DefaultAdmissionConfig'}}
data['admissionConfig']['pluginConfig'] = dict_add
kube_config = data['kubernetesMasterConfig']
for key in ('apiServerArguments', 'controllerArguments'):
kube_config[key] = (
kube_config.get(key)
if isinstance(kube_config.get(key), dict) else {})
value = ['ExpandPersistentVolumes=true']
kube_config[key]['feature-gates'] = value
with open(temp_filename, 'w+') as f:
yaml.dump(data, f, default_flow_style=False)
try:
g.upload(master_node, temp_filename, MASTER_CONFIG_FILEPATH)
except Exception as e:
err_msg = (
"Failed to upload '{}' to master node '{}' due to"
"exception\n{}".format(
master_node, MASTER_CONFIG_FILEPATH, six.text_type(e)))
raise ExecutionError(err_msg)
os.unlink(temp_filename)
if version == "3.9":
cmd = ("systemctl restart atomic-openshift-master-api "
"atomic-openshift-master-controllers")
else:
cmd = ("/usr/local/bin/master-restart api && "
"/usr/local/bin/master-restart controllers")
ret, out, err = g.run(master_node, cmd, "root")
if ret != 0:
err_msg = "Failed to execute cmd %s on %s\nout: %s\nerr: %s" % (
cmd, master_node, out, err)
g.log.error(err_msg)
raise ExecutionError(err_msg)
# Wait for API service to be ready after the restart
for w in waiter.Waiter(timeout=120, interval=1):
try:
cmd_run("oc get nodes", master_node)
return True
except AssertionError:
continue
err_msg = "Exceeded 120s timeout waiting for OCP API to start responding."
g.log.error(err_msg)
raise ExecutionError(err_msg)
def get_iscsi_session(node, iqn=None, raise_on_error=True):
"""Get the list of ip's of iscsi sessions.
Args:
node (str): where we want to run the command.
iqn (str): name of iqn.
Returns:
list: list of session ip's.
raises:
ExecutionError: In case of any failure if raise_on_error=True.
"""
cmd = "set -o pipefail && ((iscsiadm -m session"
if iqn:
cmd += " | grep %s" % iqn
cmd += ") | awk '{print $3}' | cut -d ':' -f 1)"
out = cmd_run(cmd, node, raise_on_error=raise_on_error)
return out.split("\n") if out else out
def get_iscsi_block_devices_by_path(node, iqn=None, raise_on_error=True):
"""Get list of iscsiadm block devices from path.
Args:
node (str): where we want to run the command.
iqn (str): name of iqn.
returns:
dictionary: block devices and there ips.
raises:
ExecutionError: In case of any failure if raise_on_error=True.
"""
cmd = "set -o pipefail && ((ls --format=context /dev/disk/by-path/ip*"
if iqn:
cmd += " | grep %s" % iqn
cmd += ") | awk -F '/|:|-' '{print $10,$25}')"
out = cmd_run(cmd, node, raise_on_error=raise_on_error)
if not out:
return out
out_dic = {}
for i in out.split("\n"):
ip, device = i.strip().split(" ")
out_dic[device] = ip
return out_dic
def get_mpath_name_from_device_name(node, device, raise_on_error=True):
"""Get name of mpath device form block device
Args:
node (str): where we want to run the command.
device (str): for which we have to find mpath.
Returns:
str: name of device
Raises:
ExecutionError: In case of any failure if raise_on_error=True.
"""
cmd = ("set -o pipefail && ((lsblk -n --list --output=NAME /dev/%s)"
" | tail -1)" % device)
return cmd_run(cmd, node, raise_on_error=raise_on_error)
def get_active_and_enabled_devices_from_mpath(node, mpath):
"""Get active and enabled devices from mpath name.
Args:
node (str): where we want to run the command.
mpath (str): name of mpath for which we have to find devices.
Returns:
dictionary: devices info
Raises:
ExecutionError: In case of any failure
"""
cmd = ("set -o pipefail && ((multipath -ll %s | grep -A 1 status=%s)"
r" | grep -v '\-\-' | cut -d ':' -f 4 | awk '{print $2}')")
active = cmd_run(cmd % (mpath, 'active'), node).split('\n')[1::2]
enabled = cmd_run(cmd % (mpath, 'enabled'), node).split('\n')[1::2]
out_dic = {
'active': active,
'enabled': enabled}
return out_dic
def get_pvs_info(node, gluster_node_ip, devices_list, raise_on_error=True):
"""Get pv_name, pv_uuid and vg_name from given node.
Args:
node (str): ocp client node ip.
gluster_node_ip (str): where we want to run the command.
devices_list (list): list of device list to get pvs info.
Returns:
pvs_info (list): pvs info for devices_list
Raises:
ExecutionError: In case of any failure if raise_on_error=True.
"""
pvs_info = []
for device in devices_list:
cmd = ("pvs -o pv_name,pv_uuid,vg_name | grep {}".format(device))
out = cmd_run_on_gluster_pod_or_node(
node, cmd, gluster_node_ip, raise_on_error=raise_on_error)
pvs_info.append(out.split())
return pvs_info
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