Package ganeti :: Package client :: Module gnt_instance

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Module gnt_instance

source code

Instance related commands

Functions

[hide private]

list

_ExpandMultiNames(mode, names, client=None)
Expand the given names using the passed mode.

source code

_EnsureInstancesExist(client, names)
Check for and ensure the given instance names exist.

source code

GenericManyOps(operation, fn)
Generic multi-instance operations.

source code

int

ListInstances(opts, args)
List instances and their properties.

source code

int

ListInstanceFields(opts, args)
List instance fields.

source code

AddInstance(opts, args)
Add an instance to the cluster.

source code

int

BatchCreate(opts, args)
Create instances using a definition file.

source code

int

ReinstallInstance(opts, args)
Reinstall an instance.

source code

int

RemoveInstance(opts, args)
Remove an instance.

source code

int

RenameInstance(opts, args)
Rename an instance.

source code

int

ActivateDisks(opts, args)
Activate an instance's disks.

source code

int

DeactivateDisks(opts, args)
Deactivate an instance's disks.

source code

int

RecreateDisks(opts, args)
Recreate an instance's disks.

source code

int

GrowDisk(opts, args)
Grow an instance's disks.

source code

_StartupInstance(name, opts)
Startup instances.

source code

_RebootInstance(name, opts)
Reboot instance(s).

source code

_ShutdownInstance(name, opts)
Shutdown an instance.

source code

int

ReplaceDisks(opts, args)
Replace the disks of an instance

source code

int

FailoverInstance(opts, args)
Failover an instance.

source code

int

MigrateInstance(opts, args)
Migrate an instance.

source code

int

MoveInstance(opts, args)
Move an instance.

source code

int

ConnectToInstanceConsole(opts, args)
Connect to the console of an instance.

source code

_DoConsole(console, show_command, cluster_name, feedback_fn=ToStdout, _runcmd_fn=utils.RunCmd)
Acts based on the result of opcodes.OpInstanceConsole.

source code

_FormatLogicalID(dev_type, logical_id, roman)
Formats the logical_id of a disk.

source code

_FormatBlockDevInfo(idx, top_level, dev, roman)
Show block device information.

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_FormatList(buf, data, indent_level)
Formats a list of data at a given indent level.

source code

int

ShowInstanceConfig(opts, args)
Compute instance run-time status.

source code

int

SetInstanceParams(opts, args)
Modifies an instance.

source code

ChangeGroup(opts, args)
Moves an instance to another group.

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Main()

source code

Variables

[hide private]

_EXPAND_CLUSTER = "cluster"

_EXPAND_NODES_BOTH = "nodes"

_EXPAND_NODES_PRI = "nodes-pri"

_EXPAND_NODES_SEC = "nodes-sec"

_EXPAND_NODES_BOTH_BY_TAGS = "nodes-by-tags"

_EXPAND_NODES_PRI_BY_TAGS = "nodes-pri-by-tags"

_EXPAND_NODES_SEC_BY_TAGS = "nodes-sec-by-tags"

_EXPAND_INSTANCES = "instances"

_EXPAND_INSTANCES_BY_TAGS = "instances-by-tags"

_EXPAND_NODES_TAGS_MODES = frozenset([_EXPAND_NODES_BOTH_BY_TA...

_LIST_DEF_FIELDS = ["name", "hypervisor", "os", "pnode", "stat...
default list of options for ListInstances

m_force_multi = cli_option("--force-multiple", dest= "force_mu...

m_pri_node_opt = cli_option("--primary", dest= "multi_mode", h...

m_sec_node_opt = cli_option("--secondary", dest= "multi_mode",...

m_node_opt = cli_option("--node", dest= "multi_mode", help= "F...

m_clust_opt = cli_option("--all", dest= "multi_mode", help= "S...

m_inst_opt = cli_option("--instance", dest= "multi_mode", help...

m_node_tags_opt = cli_option("--node-tags", dest= "multi_mode"...

m_pri_node_tags_opt = cli_option("--pri-node-tags", dest= "mul...

m_sec_node_tags_opt = cli_option("--sec-node-tags", dest= "mul...

m_inst_tags_opt = cli_option("--tags", dest= "multi_mode", hel...

add_opts = [NOSTART_OPT, OS_OPT, FORCE_VARIANT_OPT, NO_INSTALL...

commands = {"add":(AddInstance, [ArgHost(min= 1, max= 1)], COM...

aliases = {"start": "startup", "stop": "shutdown",}
dictionary with aliases for commands

Imports: itertools, simplejson, logging, StringIO, opcodes, constants, compat, utils, errors, netutils, ssh, objects

Function Details

[hide private]

_ExpandMultiNames(mode, names, client=None)

source code

Expand the given names using the passed mode.

For _EXPAND_CLUSTER, all instances will be returned. For _EXPAND_NODES_PRI/SEC, all instances having those nodes as primary/secondary will be returned. For _EXPAND_NODES_BOTH, all instances having those nodes as either primary or secondary will be returned. For _EXPAND_INSTANCES, the given instances will be returned.

Parameters:

mode - one of _EXPAND_CLUSTER, _EXPAND_NODES_BOTH, _EXPAND_NODES_PRI, _EXPAND_NODES_SEC or _EXPAND_INSTANCES
names - a list of names; for cluster, it must be empty, and for node and instance it must be a list of valid item names (short names are valid as usual, e.g. node1 instead of node1.example.com)

Returns: list

the list of names after the expansion

Raises:

errors.ProgrammerError - for unknown selection type
errors.OpPrereqError - for invalid input parameters

_EnsureInstancesExist(client, names)

source code

Check for and ensure the given instance names exist.

This function will raise an OpPrereqError in case they don't exist. Otherwise it will exit cleanly.

Parameters:

client (ganeti.luxi.Client) - the client to use for the query
names (list) - the list of instance names to query

Raises:

errors.OpPrereqError - in case any instance is missing

GenericManyOps(operation, fn)

source code

Generic multi-instance operations.

The will return a wrapper that processes the options and arguments given, and uses the passed function to build the opcode needed for the specific operation. Thus all the generic loop/confirmation code is abstracted into this function.

ListInstances(opts, args)

source code

List instances and their properties.

Parameters:

opts - the command line options selected by the user
args (list) - should be an empty list

Returns: int

the desired exit code

ListInstanceFields(opts, args)

source code

List instance fields.

Parameters:

opts - the command line options selected by the user
args (list) - fields to list, or empty for all

Returns: int

the desired exit code

AddInstance(opts, args)

source code

Add an instance to the cluster.

This is just a wrapper over GenericInstanceCreate.

BatchCreate(opts, args)

source code

Create instances using a definition file.

This function reads a json file with instances defined in the form:

 {"instance-name":{
   "disk_size": [20480],
   "template": "drbd",
   "backend": {
     "memory": 512,
     "vcpus": 1 },
   "os": "debootstrap",
   "primary_node": "firstnode",
   "secondary_node": "secondnode",
   "iallocator": "dumb"}
 }

Note that primary_node and secondary_node have precedence over iallocator.

Parameters:

opts - the command line options selected by the user
args (list) - should contain one element, the json filename

Returns: int

the desired exit code

ReinstallInstance(opts, args)

source code

Reinstall an instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the name of the instance to be reinstalled

Returns: int

the desired exit code

RemoveInstance(opts, args)

source code

Remove an instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the name of the instance to be removed

Returns: int

the desired exit code

RenameInstance(opts, args)

source code

Rename an instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain two elements, the old and the new instance names

Returns: int

the desired exit code

ActivateDisks(opts, args)

source code

Activate an instance's disks.

This serves two purposes:

it allows (as long as the instance is not running) mounting the disks and modifying them from the node
it repairs inactive secondary drbds

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

DeactivateDisks(opts, args)

source code

Deactivate an instance's disks.

This function takes the instance name, looks for its primary node and the tries to shutdown its block devices on that node.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

RecreateDisks(opts, args)

source code

Recreate an instance's disks.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

GrowDisk(opts, args)

source code

Grow an instance's disks.

Parameters:

opts - the command line options selected by the user
args (list) - should contain two elements, the instance name whose disks we grow and the disk name, e.g. sda

Returns: int

the desired exit code

_StartupInstance(name, opts)

source code

Startup instances.

This returns the opcode to start an instance, and its decorator will wrap this into a loop starting all desired instances.

Parameters:

name - the name of the instance to act on
opts - the command line options selected by the user

Returns:

the opcode needed for the operation

_RebootInstance(name, opts)

source code

Reboot instance(s).

This returns the opcode to reboot an instance, and its decorator will wrap this into a loop rebooting all desired instances.

Parameters:

name - the name of the instance to act on
opts - the command line options selected by the user

Returns:

the opcode needed for the operation

_ShutdownInstance(name, opts)

source code

Shutdown an instance.

This returns the opcode to shutdown an instance, and its decorator will wrap this into a loop shutting down all desired instances.

Parameters:

name - the name of the instance to act on
opts - the command line options selected by the user

Returns:

the opcode needed for the operation

ReplaceDisks(opts, args)

source code

Replace the disks of an instance

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

FailoverInstance(opts, args)

source code

Failover an instance.

The failover is done by shutting it down on its present node and starting it on the secondary.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

MigrateInstance(opts, args)

source code

Migrate an instance.

The migrate is done without shutdown.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

MoveInstance(opts, args)

source code

Move an instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

ConnectToInstanceConsole(opts, args)

source code

Connect to the console of an instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

_DoConsole(console, show_command, cluster_name, feedback_fn=ToStdout, _runcmd_fn=utils.RunCmd)

source code

Acts based on the result of opcodes.OpInstanceConsole.

Parameters:

console (objects.InstanceConsole) - Console object
show_command (bool) - Whether to just display commands
cluster_name (string) - Cluster name as retrieved from master daemon

_FormatBlockDevInfo(idx, top_level, dev, roman)

source code

Show block device information.

This is only used by ShowInstanceConfig, but it's too big to be left for an inline definition.

Parameters:

idx (int) - the index of the current disk
top_level (boolean) - if this a top-level disk?
dev (dict) - dictionary with disk information
roman (boolean) - whether to try to use roman integers

Returns:

a list of either strings, tuples or lists (which should be formatted at a higher indent level)

_FormatList(buf, data, indent_level)

source code

Formats a list of data at a given indent level.

If the element of the list is:

a string, it is simply formatted as is
a tuple, it will be split into key, value and the all the values in a list will be aligned all at the same start column
a list, will be recursively formatted

Parameters:

buf (StringIO) - the buffer into which we write the output
data - the list to format
indent_level (int) - the indent level to format at

ShowInstanceConfig(opts, args)

source code

Compute instance run-time status.

Parameters:

opts - the command line options selected by the user
args (list) - either an empty list, and then we query all instances, or should contain a list of instance names

Returns: int

the desired exit code

SetInstanceParams(opts, args)

source code

Modifies an instance.

All parameters take effect only at the next restart of the instance.

Parameters:

opts - the command line options selected by the user
args (list) - should contain only one element, the instance name

Returns: int

the desired exit code

Variables Details

[hide private]

_EXPAND_NODES_TAGS_MODES

Value:

frozenset([_EXPAND_NODES_BOTH_BY_TAGS, _EXPAND_NODES_PRI_BY_TAGS, _EXP
AND_NODES_SEC_BY_TAGS,])

_LIST_DEF_FIELDS

default list of options for ListInstances

Value:

["name", "hypervisor", "os", "pnode", "status", "oper_ram",]

m_force_multi

Value:

cli_option("--force-multiple", dest= "force_multi", help= "Do not ask 
for confirmation when more than" " one instance is affected", action= 
"store_true", default= False)

m_pri_node_opt

Value:

cli_option("--primary", dest= "multi_mode", help= "Filter by nodes (pr
imary only)", const= _EXPAND_NODES_PRI, action= "store_const")

m_sec_node_opt

Value:

cli_option("--secondary", dest= "multi_mode", help= "Filter by nodes (
secondary only)", const= _EXPAND_NODES_SEC, action= "store_const")

m_node_opt

Value:

cli_option("--node", dest= "multi_mode", help= "Filter by nodes (prima
ry and secondary)", const= _EXPAND_NODES_BOTH, action= "store_const")

m_clust_opt

Value:

cli_option("--all", dest= "multi_mode", help= "Select all instances in
 the cluster", const= _EXPAND_CLUSTER, action= "store_const")

m_inst_opt

Value:

cli_option("--instance", dest= "multi_mode", help= "Filter by instance
 name [default]", const= _EXPAND_INSTANCES, action= "store_const")

m_node_tags_opt

Value:

cli_option("--node-tags", dest= "multi_mode", help= "Filter by node ta
g", const= _EXPAND_NODES_BOTH_BY_TAGS, action= "store_const")

m_pri_node_tags_opt

Value:

cli_option("--pri-node-tags", dest= "multi_mode", help= "Filter by pri
mary node tag", const= _EXPAND_NODES_PRI_BY_TAGS, action= "store_const
")

m_sec_node_tags_opt

Value:

cli_option("--sec-node-tags", dest= "multi_mode", help= "Filter by sec
ondary node tag", const= _EXPAND_NODES_SEC_BY_TAGS, action= "store_con
st")

m_inst_tags_opt

Value:

cli_option("--tags", dest= "multi_mode", help= "Filter by instance tag
", const= _EXPAND_INSTANCES_BY_TAGS, action= "store_const")

add_opts

Value:

[NOSTART_OPT, OS_OPT, FORCE_VARIANT_OPT, NO_INSTALL_OPT,]

commands

Value:

{"add":(AddInstance, [ArgHost(min= 1, max= 1)], COMMON_CREATE_OPTS+ ad
d_opts, "[...] -t disk-type -n node[:secondary-node] -o os-type <name>
", "Creates and adds a new instance to the cluster"), "batch-create":(
BatchCreate, [ArgFile(min= 1, max= 1)], [DRY_RUN_OPT, PRIORITY_OPT], "
<instances.json>", "Create a bunch of instances based on specs in the 
file."), "console":(ConnectToInstanceConsole, ARGS_ONE_INSTANCE, [SHOW
CMD_OPT, PRIORITY_OPT], "[--show-cmd] <instance>", "Opens a console on
 the specified instance"), "failover":(FailoverInstance, ARGS_ONE_INST
...