5733aadb2c
Add a syslog handler and make it always output debug level log messages. This way, if everything zooms by on the console, at least you've got a chance of reconstructing things from the logs/journal. Add a streamhandler to retain the interactive output, enabled for debug level with --debug as before. Change-Id: Ie50acb97bbe5a2bb3c5aa11c2c327290218abd8e
glean
Glean is a program intended to configure a system based on configuration provided in a configuration drive.
Why would you want glean?
Different cloud providers have different ways of providing networking and other configuration to guest virtual-machines. Many use DHCP but others, notably Rackspace, use configuration provided via a configuration drive.
What does glean do?
Glean firstly checks for configuration drive based information and, if found, uses that for network configuration. If config-drive is not found, it falls back to configuring any available interfaces with DHCP.
Specifically, it will mount the special block-device with label config-2 and parse the network_info.json and vendor_info.json files within. If appropriate network configuration is found, it will write out network configuration files (e.g. /etc/sysconfig/network/ scripts on Red Hat platforms, /etc/interfaces on Debian, etc).
If no network info is found there, available interfaces will be probed from /sys/class/net and any that appear to be up will be configured for use with DHCP.
It will also handle authorized_keys and host-name info provided from meta_data.json.
How do I use glean?
Glean ships glean-install, a script which install glean into your system startup environment. It should handle sysv, upstart and systemd to cover all major distributions. This should be run once, during install or image build.
The startup environment will run glean.sh, which configures any found interfaces as described above.
Differences to cloud-config?
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- Free software: Apache license
- Documentation: http://docs.openstack.org/infra/glean
- Source: http://git.openstack.org/cgit/openstack-infra/glean
- Bugs: http://storyboard.openstack.org