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#!/usr/bin/env python3
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import sys
from charmhelpers.core import hookenv
from jujubigdata.utils import run_as
from charms.reactive import is_state
if not is_state('apache-bigtop-namenode.ready'):
hookenv.action_fail('Charm is not yet ready')
# verify the hdfs-test directory does not already exist
output = run_as('ubuntu', 'hdfs', 'dfs', '-ls', '/tmp', capture_output=True)
if '/tmp/hdfs-test' in output:
run_as('ubuntu', 'hdfs', 'dfs', '-rm', '-R', '/tmp/hdfs-test')
output = run_as('ubuntu', 'hdfs', 'dfs', '-ls', '/tmp', capture_output=True)
if 'hdfs-test' in output:
hookenv.action_fail('Unable to remove existing hdfs-test directory')
sys.exit()
# create the directory
run_as('ubuntu', 'hdfs', 'dfs', '-mkdir', '-p', '/tmp/hdfs-test')
run_as('ubuntu', 'hdfs', 'dfs', '-chmod', '-R', '777', '/tmp/hdfs-test')
# verify the newly created hdfs-test subdirectory exists
output = run_as('ubuntu', 'hdfs', 'dfs', '-ls', '/tmp', capture_output=True)
for line in output.split('\n'):
if '/tmp/hdfs-test' in line:
if 'ubuntu' not in line or 'drwxrwxrwx' not in line:
hookenv.action_fail('Permissions incorrect for hdfs-test directory')
sys.exit()
break
else:
hookenv.action_fail('Unable to create hdfs-test directory')
sys.exit()
# remove the directory
run_as('ubuntu', 'hdfs', 'dfs', '-rm', '-R', '/tmp/hdfs-test')
# verify the hdfs-test subdirectory has been removed
output = run_as('ubuntu', 'hdfs', 'dfs', '-ls', '/tmp', capture_output=True)
if '/tmp/hdfs-test' in output:
hookenv.action_fail('Unable to remove hdfs-test directory')
sys.exit()
hookenv.action_set({'outcome': 'success'})
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