3954065549
* Deprecated power_management parameter. * Added power_managements to configuration. * Removed power_management variable from NodeCollection and Service. * Added PowerManager class that controls running of power drivers. * Updated docs. Change-Id: Idabcb1fb907022f0d556667cbf3c36326f526a08
167 lines
4.4 KiB
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167 lines
4.4 KiB
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=====
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Usage
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=====
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Configuration
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-------------
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The cloud deployment configuration schema is an extension to the cloud config
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used by the `os-client-config <https://github.com/openstack/os-client-config>`_
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library:
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.. code-block:: python
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cloud_config = {
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'cloud_management': {
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'driver': 'devstack',
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'args': {
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'address': 'devstack.local',
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'username': 'root',
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}
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},
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'power_managements': [
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{
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'driver': 'libvirt',
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'args': {
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'connection_uri': 'qemu+unix:///system',
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}
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}
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]
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}
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Establish a connection to the cloud and verify it:
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.. code-block:: python
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destructor = os_faults.connect(cloud_config)
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destructor.verify()
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The library can also read configuration from a file and the file can be in the
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following three formats: os-faults.{json,yaml,yml}. The configuration file can
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be specified in the `OS_FAULTS_CONFIG` environment variable or can be read from
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one of the default locations:
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* current directory
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* ~/.config/os-faults
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* /etc/openstack
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Make some destructive actions:
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.. code-block:: python
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destructor.get_service(name='keystone').restart()
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The library operates with 2 types of objects:
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* `service` - is a software that runs in the cloud, e.g. `nova-api`
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* `nodes` - nodes that host the cloud, e.g. a hardware server with a hostname
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Simplified API
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--------------
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Simplified API is used to inject faults in a human-friendly form.
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**Service-oriented** command performs specified `action` against `service` on
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all, on one random node or on the node specified by FQDN::
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<action> <service> service [on (random|one|single|<fqdn> node[s])]
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Examples:
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* `Restart Keystone service` - restarts Keystone service on all nodes.
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* `kill nova-api service on one node` - restarts Nova API on one
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randomly-picked node.
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**Node-oriented** command performs specified `action` on node specified by FQDN
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or set of service's nodes::
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<action> [random|one|single|<fqdn>] node[s] [with <service> service]
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Examples:
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* `Reboot one node with mysql` - reboots one random node with MySQL.
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* `Reset node-2.domain.tld node` - reset node `node-2.domain.tld`.
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**Network-oriented** command is a subset of node-oriented and performs network
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management operation on selected nodes::
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<action> <network> network on [random|one|single|<fqdn>] node[s]
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[with <service> service]
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Examples:
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* `Disconnect management network on nodes with rabbitmq service` - shuts
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down management network interface on all nodes where rabbitmq runs.
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* `Connect storage network on node-1.domain.tld node` - enables storage
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network interface on node-1.domain.tld.
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Extended API
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------------
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1. Service actions
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~~~~~~~~~~~~~~~~~~
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Get a service and restart it:
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.. code-block:: python
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destructor = os_faults.connect(cloud_config)
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service = destructor.get_service(name='glance-api')
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service.restart()
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Available actions:
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* `start` - start Service
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* `terminate` - terminate Service gracefully
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* `restart` - restart Service
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* `kill` - terminate Service abruptly
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* `unplug` - unplug Service out of network
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* `plug` - plug Service into network
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2. Node actions
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~~~~~~~~~~~~~~~
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Get all nodes in the cloud and reboot them:
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.. code-block:: python
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nodes = destructor.get_nodes()
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nodes.reboot()
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Available actions:
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* `reboot` - reboot all nodes gracefully
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* `poweroff` - power off all nodes abruptly
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* `reset` - reset (cold restart) all nodes
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* `oom` - fill all node's RAM
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* `disconnect` - disable network with the specified name on all nodes
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* `connect` - enable network with the specified name on all nodes
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3. Operate with nodes
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~~~~~~~~~~~~~~~~~~~~~
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Get all nodes where a service runs, pick one of them and reset:
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.. code-block:: python
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nodes = service.get_nodes()
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one = nodes.pick()
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one.reset()
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Get nodes where l3-agent runs and disable the management network on them:
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.. code-block:: python
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fqdns = neutron.l3_agent_list_hosting_router(router_id)
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nodes = destructor.get_nodes(fqdns=fqdns)
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nodes.disconnect(network_name='management')
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4. Operate with services
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~~~~~~~~~~~~~~~~~~~~~~~~
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Restart a service on a single node:
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.. code-block:: python
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service = destructor.get_service(name='keystone')
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nodes = service.get_nodes().pick()
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service.restart(nodes)
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