Synnefo » snf-ganeti

Add calls in the intra-node migration protocol

Currently the hypervisor is expected to do all the migration from the
source side. With this patch we also add the option of passing some
information to the target side, and starting some operation there.

As a bonus, a function to cleanup any started operation is included....

Fix adding of disks to an instance

The ConfigWriter.AllocateDRBDMinor requires the instance name, not the
instance object. The LUSetInstanceParms is passing wrongly the instance
object, which can cause breakage.

The patch also adds asserts to check for this mismatch in ConfigWriter....

Some small fixes in cmdlib

Reviewed-by: ultrotter

Convert the start instance rpc to (status, data)

This will record the failure cause in starting up the instance in the
job log (and thus to the user).

Reviewed-by: ultrotter

Use instance.all_nodes instead of hand-building it

This patch replaces a few obvious uses of [instance.primary_node] +
list(instance.secondary_nodes) (or similar usage) with the new
instance.all_nodes.

Reviewed-by: ultrotter

Combine the two _CreateBlockDevOnXXX functions

Since only two boolean parameters differ between these two functions, we
combine them as to have less code duplication. This will be needed in
the future as we will need to split off the recursive part off.
...

Small change in the instance disk creation path

For future propagation of error messages from backend to cmdlib and to
the job log, just having True/False return from the disk creation
function is not enough.

This patch converts these functions (_CreateDisks, _CreateBlockDevOnXXX)...

Fix LUExportInstance

Due to deficiencies in our block device implementation, it is a must to
call SetDiskID on disks before passing them to remote nodes. Since in
export/import, we don't touch the disks themselves, this was not needed
before in this function....

Forward port the live migration from 1.2 branch

This is forward port via copy (and not individual patches cherry-pick)
of the latest code on the 1.2 branch related to the migration.

The changes compared to 1.2 are the fact that we don't need the
IdentifyDisks step anymore (the drbd rpc calls are independent now), and...

Fix modification of instance memory

... as found by the QA script - bug was introduced by me in commit 2117.

Reviwed-by: imsnah

Fix an error handling case in instance info

The checking for invalid instance names in LUQueryInstanceData is broken
since commit 1642.

Reviewed-by: imsnah

Fix gnt-os for offline nodes

We shouldn't query offline nodes in gnt-os. This patch adds an utility
function to ConfigWriter that returns the names of online nodes and uses
it in LUDiagnoseOS to query only the good nodes.

Reviewed-by: imsnah

Fix cluster verify/node net test for offline nodes

For offline nodes, we shouldn't add them to the NV_NODELIST and
NV_NODENETTEST tests since they most likely won't succeed.

The patch makes gnt-cluster verify happy again in such cases.

Reviewed-by: imsnah

ganeti.cmdlib: Check remote API certificate on "gnt-cluster verify"

Reviewed-by: amishchenko

cleanup: fix IAllocator hypervisor usage

Two problems: the iallocator.hypervisor wasn't initialized to None in
the constructor, so pylint doesn't realize it's initialized later with
setattr.

Second, 'hypervisor' is a module, so we shouldn't use it as a variable....

cleanup: do not hide upper-scope name

hypervisor is a module, so we shouldn't use it as an argument.

Reviewed-by: amishchenko

cleanup: LUAddNode, LUSetNodeParams unused variable

This is a leftover from the abstraction of AdjustCandidatePool, and it
also requires the config lock, so it's better to remove it.

Reviewed-by: amishchenko

Warn for instances living on offline nodes

The patch also changes the result to error for non-reachable secondary nodes
(as for primary nodes).

Reviewed-by: ultrotter

gnt-node modify: add the offline attribute

This patch changes gnt-node modify and the associated opcode/lu to allow
modification of the node offline attribute.

Setting a node into offline mode automatically demotes it from the
master role.

Reviewed-by: ultrotter

cmdlib: check node stats in prereqs

This patch adds checks for offline nodes in most instance LUs so that we
can work with offline secondaries, but not with offline primaries. Some
cases (like grow disk, which needs both sides up) are not allowing
offline nodes at all....

Add function to compute the master candidates

Since some nodes can be offline, we can't just take the length of the
node list as the maximum possible number of master candidates.

The patch adds an utility function to correctly compute this value and
replaces hardcoded computations with the use of this function. It then...

watcher: handle offline nodes better

This patch changes the LUQueryInstances to show a different state for
offline nodes and also modifies the watcher to understand the offline
state in its checks.

Reviewed-by: ultrotter

Add a new node parameter 'offline'

This patch adds a new node parameter called offline that will be used to
mark nodes which should be touched by commands.

We also add this flag at cluster init, node add, and export it to
iallocator scripts.

Reviewed-by: ultrotter

LUQueryExports: fix rpcresult handling

call_export_list is a multi node call, so we need to go through the
results, extrapolate the good ones, and return a failure value for the
bad ones.

Reviewed-by: imsnah

LUAddNode: Check the correct result

This is a typo in the conversion to RpcResult

Reviewed-by: imsnah

Fix cluster rename and known_hosts

This patch rewrites and distributes ganeti's known_hosts file in case of
a cluster rename.

We also fix a problem in the node add (from where I copied the
known_hosts file distribution).

Reviewed-by: ultrotter

Fix cluster rename

With the recent configwriter/ssconf changes, cluster rename becomes
trivial. This patch gets rids of the code and just updates the cluster
object.

Reviewed-by: imsnah

Use the new utils.CheckBEParams function

Where we used/forgot to validate beparams we now use the new common function.

Reviewed-by: imsnah

ImportExport: make src_node and src_path optional

If src_node is not there we'll default to using the currently exported
instance name as src_path. Also, if src_path is not absolute we'll look
for it in EXPORT_DIR.

Reviewed-by: iustinp

LUCreateInstance: keep src node lock on import

Currently the node lock also guards against removing the import at the
wrong time, so if we're importing an instance image we want to keep the
source node locked. In the future we might want to put export locks at a...

Prevent demotion from candidate based on pool size

In gnt-cluster modify we prevent demotion from the candidate role if
there are not enough master candidates left.

Reviewed-by: imsnah

Add a gnt-node modify operation

This patch adds the OpCode, LogicalUnit and gnt-node command for
modifying node parameters, more specifically the master candidate flag
for a node.

Reviewed-by: imsnah

Fix errors when the node info RPC is incomplete

[Forward-port from the 1.2 branch]

If ganeti starts before xend, the node information will not have all the
fields filled in. The patch changes so that missing keys will be treated
as unknown (this applies to other cases as well, not only xend not...

Fix a message in LUExportInstance

We never verified the node name before, so this is most likely not a
non-retrieve but a wrong name case.

Reviewed-by: ultrotter

Implement support for multi devices changes

This big patch adds support for:
- changing NIC/disks in the multi-device model
- adding/removing NICs
- adding/removing disks

The patch is big and not very nice; the error checking paths are not
very clear....

Fix a bug in LUSetInstanceParams

The wrong names were reused in a copy-paste.

Reviewed-by: imsnah

Change _GenerateDiskTemplate iv_name generation

Currently the _GenerateDiskTemplate assumes it does initial creation of
disks (i.e. it starts with index 0).

For dynamic disk adds, we need to pass an additional offset. This patch
adds this offset and modifies its sole current caller....

LUCreateInstance unlock all nodes mid-way

When creating a new instance, after saving the instance data to the config file
and creating the disks, but before waiting for sync and installing the OS, we
release the node locks, to allow for more instance creations to proceed in...

IAllocator: use the right hypervisor

Since the hypervisor is instance dependent we'll get one on instance creation,
and use the one in the instance config on relocation.

Reviewed-by: iustinp

Parallelize instance operations on the same node

With static minors we don't have a race condition anymore when
starting/stopping/rebooting/reinstalling more than one instance on the same
node, so we'll drop node locking altogether.

Reviewed-by: iustinp

Documentation updates for cmdlib.py

This makes cmdlib.py not throw epydoc errors anymore.

Reviewed-by: ultrotter

Change disk index validation to FindDisk

This patch replaces the hand validation of the disk index with the
instance.FindDisk method (actually reverting to previous method, before
the multi-disk, but now with indexes).

Reviewed-by: ultrotter

Change replace secondary to work with multi-disk

Also fix an error in the CheckPrereq.

Reviewed-by: imsnah

Initial multi-disk/multi-nic support

This patch adds support for mult-disk/multi-nic in:
- instance add
- burnin

The start/stop/failover/cluster verify work as expected. Replace disk
and grow disk are TODO.

There's also a change gnt-job to allow dictionaries to be listed in...

Allow querying of variable number of parameters

This patch adds support for querying in gnt-instance list of:
- disk.count
- nic.count
- disk.size/$N
- nic.(ip|mac|bridge)/$N

The patch also disables the exception raised when the header description...

Add a FieldSet class for variable parameter sets

This patch adds a _FieldSet class that can be used for the new variable
parameter sets: e.g. the sda_size will change to disk/0.size (or
similar) and we need to both check validity and extract the index of the...

Fix gnt-instance reinstall

Commit 1881 changed a rpc call but didn't fix all its users. This should
fix it (but I can't test as HTTP is broken).

Reviewed-by: imsnah

Export the disk index in the import/export scripts

We want to export the disk index as some OSes will only want to export
the first disk (or the second one, etc.), even if we have multiple
disks.

The patch also updates the backend.ExportSnapshot docstring....

LUCreateInstance: import multiple disks

Previously we used to handle only one disk. Now we'll import all the
ones present in the export, in order, on the instance's disks. Any disk
which was present on the original instance but wasn't exported is just
skipped in the target instance....

LUExportInstance: snapshot all disks

Rather than just snapshotting the "sda" disk, we'll snapshot all of the
instance disks. If we can't snapshot a disk for any reason we'll log an
error and proceed anyway: in this case the resulting export will miss a
disk. This also changes all the warning messages to self.LogWarning()....