b8a838c66c
It is sometimes usefull for force reinstallation of the node_exporter, for example during upgrade or if something is wrong with the current installation. This patch adds a --force command line option. If the --force is given to the node_expoerter_install, it will reinstall node_exporter to the latest version, regardless if it was already installed. The symbolic link in /usr/bin/node_exporter will be set to the installed version, so if there are other installed version, they will remain. Examples: $ sudo ./dist/common/scripts/node_exporter_install node_exporter already installed, you can use `--force` to force reinstallation $ sudo ./dist/common/scripts/node_exporter_install --force node_exporter already installed, reinstalling Fixes #4201 Signed-off-by: Amnon Heiman <amnon@scylladb.com> Message-Id: <20190225151120.21919-1-amnon@scylladb.com>
75 lines
3.0 KiB
Python
Executable File
75 lines
3.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright 2018 ScyllaDB
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#
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#
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# This file is part of Scylla.
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#
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# Scylla is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Scylla is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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import os
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import sys
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import tempfile
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import tarfile
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from scylla_util import *
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import argparse
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VERSION='0.17.0'
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INSTALL_DIR='/usr/lib/scylla/Prometheus/node_exporter'
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description='Download and install prometheus node_exporter')
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parser.add_argument('-F', '--force', action='store_true', default=False, help='Force re-installation when node_exporter is already installed')
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args = parser.parse_args()
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force = args.force
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if os.getuid() > 0:
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print('Requires root permission.')
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sys.exit(1)
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if os.path.exists('/usr/bin/node_exporter') or os.path.exists('/usr/bin/prometheus-node_exporter'):
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if force:
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print('node_exporter already installed, reinstalling')
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else:
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print('node_exporter already installed, you can use `--force` to force reinstallation')
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sys.exit(1)
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if is_gentoo_variant():
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run('emerge -uq app-metrics/node_exporter')
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if is_systemd():
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print('app-metrics/node_exporter does not install systemd service files, please fill a bug if you need them.')
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sys.exit(1)
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else:
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run('rc-update add node_exporter default')
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run('rc-service node_exporter start')
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else:
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data = curl('https://github.com/prometheus/node_exporter/releases/download/v{version}/node_exporter-{version}.linux-amd64.tar.gz'.format(version=VERSION), byte=True)
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with open('/var/tmp/node_exporter-{version}.linux-amd64.tar.gz'.format(version=VERSION), 'wb') as f:
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f.write(data)
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with tarfile.open('/var/tmp/node_exporter-{version}.linux-amd64.tar.gz'.format(version=VERSION)) as tf:
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tf.extractall(INSTALL_DIR)
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os.remove('/var/tmp/node_exporter-{version}.linux-amd64.tar.gz'.format(version=VERSION))
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if os.path.exists('/usr/bin/node_exporter'):
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os.remove('/usr/bin/node_exporter')
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os.symlink('{install_dir}/node_exporter-{version}.linux-amd64/node_exporter'.format(install_dir=INSTALL_DIR, version=VERSION), '/usr/bin/node_exporter')
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if is_systemd():
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node_exporter = systemd_unit('node-exporter.service')
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node_exporter.enable()
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node_exporter.start()
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else:
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run('service node-exporter start')
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print('node_exporter successfully installed')
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