This patch adds a new 'evacuate' subcommand to gnt-node. The command
will do a replace disks for all instances having that node as secondary
with the new target being the new node given.

The syntax is:
  gnt-node evacuate src_node target_node

The command by itself doesn't do any resource checks, and instead relies
on the LUFailoverInstance code to do that.

Reviewed-by: imsnah

This patch implements a simple failover command for failing over all
primary instances. This is just a batched form of gnt-instance failover.

Reviewed-by: imsnah

The new version debugs Hidden OSes as well.


Reviewed-by: iustinp

Reviewed-by: iustinp

This patch adds a '--from' option to the {add,remove}-tags commands that
allows the command to read from a file or from stdin (when passing a
dash for the filename).

Reviewed-by: imsnah

This patch adds generic functions for tag manipulations to cli.py and
modifies gnt-{cluster,node,instance} to export {list,add,remove}-tags
commands that use those.

Reviewed-by: imsnah

- Document the expected change to errors.InvalidOS
- Always pass the additional argument
- Modify DiagnoseOS output to show the path


Reviewed-by: iustinp, imsnah

As of now only the last OS was taken into consideration by diagnose, fix by
storing them all and displaying for now only the first. Also display the source
path for valid OSes.


Reviewed-by: imsnah

People might not have read all the documentation and might not expect their ssh configuration
and specially keys to be changed. Adding this warning will inform them before it happens.

Reviewed-by: iustinp

Reviewed-by: ultrotter

This patch makes the new startup/shutdown multi-instance operations to
ask for confirmation when touching more than one instance (and unless
--force-multi is given).

The code is not very short, but it does present a nice (IMO) user
interface.

Reviewed-by: ultrotter

This patch improves the AskUser function by allowing it to:
 - choose from multiple choices (instead of only y/n)
 - give help to the user
 - preserve line breaks and whitespace formatting in the message

With this patch, an instance removal looks like this:
root@xen-test1-4:~# gnt-instance remove tsetest1
This will remove the volumes of the instance tsetest1 (including
mirrors), thus removing all the data of the instance. Continue?
y/[n]/?: ?
 y - Perform the operation
 n - Do not perform the operation

This will remove the volumes of the instance tsetest1 (including
mirrors), thus removing all the data of the instance. Continue?
y/[n]/?: y

The patch also removed the _ask_user member of the opts argument, since
external code was using it (and thus it makes no sense for it to be a
private member); now gnt-* scripts are using the AskUser function
directly.

Reviewed-by: ultrotter

This patch allows 'gnt-instance add' to not start the newly-created
instance. It also allow 'gnt-instance add' and 'gnt-backup import' to
not check for IP conflicts (only when not starting the instance).

Reviewed-by: ultrotter

This patch adds a new OpCode (and corresponding LU) that implements the
cluster rename functionality.

This is done by shutting down the master role, making the needed sstore
modifications and distributing the changed files to all nodes, and then
re-enabling the master role.

The modification to the man page of gnt-cluster also moves the section
on gnt-cluster destroy in order to correct alphabetical ordering.

Reviewed-by: imsnah

Reviewed-by: iustinp

This patch adds support for instance rename operation at all remaining
layers: RPC, OpCode/LU and CLI.

Reviewed-by: imsnah

This is an initial version of the multi-instance start/stop, which
allows the gnt-instance startup and shutdown subcommands to work on
multiple instances at once.

The available selections are:
  - "gnt-instance startup --instance name..." which is the default, and
    if passed only one argument it behaves like the original command)
  - "gnt-instance startup --node name..." will work on all instances
    having either primary or secondary one of the passed names
  - "gnt-instance startup --primary name..." will work on all instances
    having primary node one of the passed names
  - "gnt-instance startup --secondary name..." will work on all
    instances having as secondary node one of the passed names
  - "gnt-instance startup --all" will work on all instances

This allows a simple cluster-wide shutdown or node shutdown (or
startup).

Note that this version stops at the first error - it will not try to
start the 2nd instance selected if there is a critical error with the
1st one.

Also note that this version is not faster than simply running manually
"gnt-instance shutdown NAME", because it doesn't parallelize the
shutdown/startup actions.

Reviewed-by: imsnah,roman.marxer

Change this to have the exact same parameters as OpQueryInstances.

Also fix burnin which is broken since r146.

Reviewed-by: imsnah

As per the changes to LUQueryNodes, the QueryInstances LU is modified to
accept a list of instances for which to compute and return information.

Reviewed-by: imsnah

Now that LUQueryNodes supports all the functionality of LUQueryNodeData,
let's migrate gnt-node.ShowNodeConfig to use it and remove all traces of
OpQueryNodeData and LUQueryNodeData.

Reviewed-by: imsnah

LUQueryNodes it's very similar to LUQueryNodeData, but it lacks two
features:
  - instance list (it has count though), both primary and secondary
  - selective node listing

In order to support these features, we change it to return raw values
instead of stringified ones (like the recent change to LUQueryInstances)
and to support query-ing of a restricted set of nodes.

This CL also modifies the gnt-node script to conform to the new protocol
and the opcode OpQueryNodes to support the new "nodes" attribute.

Reviewed-by: imsnah

Currently, LUQueryInstances will provide strings for its results. This makes it
hard for other consumers than "gnt-instance list" to use the OpQueryInstances
opcode for whatever they wish to.

The change moves the formatting in five of the six cases where this happens to
the actual gnt-instance.ListInstances procedure and removes the unconditional
convert to string in LUQueryInstances.Exec()

Reviewed-by: imsnah

The manpage wrongly states that the default unit for disk sizes is
gibibytes, whereas currently it's mebibytes. Fix that and also update
the '--help' output to display the default unit.

Reviewed-by: roman.marxer

This changes:
  - cluster setup, we no longer edit /etc/ssh/ssh_known_hosts but our
    own file
  - node add, we no longer remove root's known_hosts (twice)
  - gnt-instance console, both the LU and the script: since now the ssh
    setup is not standard, we need to build the ssh cmdline in the LU
    (instead of manually building it in the script) with the correct
    parameters and use the command line as returned in the script
  - ssh.py, many changes, split options in module-level constants so
    that building the command line in different places is easier/more
    logical
  - backend.py, we no longer remove root's known_hosts in Add node, and
    we allow our own known_hosts file to be uploaded

Reviewed-by: imsnah

This function used a hand-coded ssh call to remote nodes. Fix it to use the
ssh.SSHCall function, and in the process drop the command field from the
results, as it's too verbose and we can use (in gnt-cluster) what we passed in.

Reviewed-by: schreiberal

Reviewed-by: imsnah

Since the table generation might be useful elsewhere, let's change it to
return the data instead of directly printing it.

Its callers have also been updated.

Reviewed-by: imsnah

This changes the raising of exceptions from:
  raise Exception, value
to
  raise Exception(value)

as the first form will be removed in python-3000 and the second form is
preferred now.

The changes also involve a few cases of changing from raising standard
exceptions and use our own ones.

The new version also fixes many pylint-generated warnings, especially in
ganeti-noded where I changed many methods to @staticmethod.

There is no functionality changed (barring any bugs).

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-By: iustinp

Reviewed-by: iustinp

Reviewed-by: iustinp

- Add the command to gnt-instance.sgml

Reviewed-by: iustinp

runnable on non-master nodes (and remove the list of instances and nodes
returned by it, that information can be retrieved by other opcodes).

Also, remove the node/instance list from "gnt-cluster info" as it
doesn't make sense to duplicate this information.

Reviewed-by: imsnah

- Implement “gnt-instance reinstall”
- Fix two typos

Reviewed-by: iustinp

Reviewed-by: iustinp

Reviewed-by: iustinp

- Create all --output options using a constant
- Put node checking code from opcodes into a single function
- Do the same for output fields

Reviewed-by: iustinp

  - move the master node name from the ConfigWriter to SimpleStore (all
    nodes need this, and it was the only thing pulled in from the
    ConfigWriter on nodes)
  - fix mcpu.py and the testing w.r.t. this change; for testing, rename
    the fake_config.py to mocks.py and add a FakeSStore object
  - then add a ganeti-master script which can be run on any node at boot
    and which will not do anything if not master on start (on stop it
    will still try to remove the ip address)
  - also add a new cluster-wide variable (master_netdev) that determines
    on which interface we add this ip address; it's customizable at
    cluster init time
  - also remove the cluster name file which was separately handled from
    ssconf (not needed anymore)
  - remove the master init.d links from the list of config files as this
    is not our responsibility now