This is a simple NAS backup plugin for KVM which may be later expanded for other hypervisors. This backup plugin aims to use shared NAS storage on KVM hosts such as NFS (or CephFS and others in future), which is used to backup fully cloned VMs for backup & restore operations. This may NOT be as efficient and performant as some of the other B&R providers, but maybe useful for some KVM environments who are okay to only have full-instance backups and limited functionality.
Design & Implementation follows the `networker` B&R plugin, which is simply:
- Implement B&R plugin interfaces
- Use cmd-answer pattern to execute backup and restore operations on KVM host when VM is running (or needs to be restored) - instead of a B&R API client, relies on answers from KVM agent which executes the operations
- Backups are full VM domain snapshots, copied to a VM-specific folders on a NAS target (NFS) along with a domain XML
- Backup uses libvirt feature: https://libvirt.org/kbase/live_full_disk_backup.html orchestrated via virsh/bash script (nasbackup.sh) as the libvirt-java lacks the bindings
- Supported instance volume storage for restore operations: NFS & local storage
Refer the doc PR for feature limitations and usage details:
https://github.com/apache/cloudstack-documentation/pull/429
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
Co-authored-by: Pearl Dsilva <pearl1594@gmail.com>
Co-authored-by: Abhishek Kumar <abhishek.mrt22@gmail.com>
Co-authored-by: Suresh Kumar Anaparti <sureshkumar.anaparti@gmail.com>
This feature adds support for Ceph's RADOS Gateway (RGW) support for the
Object Store feature of CloudStack.
The RGW of Ceph is Amazon S3 compliant and is therefor an easy and straigforward
implementation of basic S3 features.
Existing Ceph environments can have the RGW added as an additional feature to a
cluster already providing RBD (Block Device) to a CloudStack environment.
Introduce the BucketTO to pass to the drivers. This replaces just passing the bucket's name.
Some upcoming drivers require more information then just the bucket name to perform their actions,
for example they require the access and secret key which belong to the account of this bucket.
This is leftover code from a long time ago and this validation test has nu influence
on the end result on how a URL will be used afterwards.
We should support hosts pointing to an IPv6(-only) address out of the box.
For the code it does not matter if it's IPv4 or IPv6. This is the admin's choice.
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
Co-authored-by: Rohit Yadav <rohit.yadav@shapeblue.com>
* NSX integration - skeletal code
* Fix module not loading on startup
* add upgrade path and daos
\n add nsx controller command
* add support for adding and listing nsx provider to a zone
* add license
* add default VPC offering and update upgrade path
* add global setting to enable nsx plugin
* add delete nsx controller operation
* add nsxresource
* add NSX resource , api client, create tier1 gw
* update db
* update response and add license
* Add support to create and delete nsx tier-1 gateway
* add license
* cleanup and add skeletal code for network creation
* add create/delete segment and UI integration
* add license
* address code smells - part 1
* fix test / build failure
* NSX integration - skeletal code
* Fix module not loading on startup
* add upgrade path and daos
\n add nsx controller command
* add support for adding and listing nsx provider to a zone
* add license
* add default VPC offering and update upgrade path
* add global setting to enable nsx plugin
* add delete nsx controller operation
* add nsxresource
* add NSX resource , api client, create tier1 gw
* update db
* update response and add license
* Add support to create and delete nsx tier-1 gateway
* add license
* cleanup and add skeletal code for network creation
* add create/delete segment and UI integration
* add license
* address code smells - part 1
* fix test / build failure
* add ui changes + update nsx_provider table transport zones + use NSX broadcast domain for add nics to router
* ui: fix password field, and backend changes
* add route advertisement
* update offering
* update offering
* add sleep before deletion of vpc / tier g/w for ports to be removed
* move creation of segments to design phase
* change provider to VPC router for Dhcp & dns service in an nsx offering
* Add public nic for NSX
* reserve first IP (after g/w) of subnet for router nic - NSX
* revert reserving 1st IP in vpc segments
* [NSX] Create a DHCP relay and add it to a VPC tier segment (#107)
* Create DHCP relay command and execute request
* In progress integrate with networking
* Create DHCP relay config on the network VR allocation
* Revert domain router dao changes
* Create DHCP relay con VR nic plug to NSX network
* Link DHCP relay config to segment after creation
* [NSX] Cleanup DHCP Relay config on segment deletion (#108)
* Cleanup DHCP Relay config on segment deletion
* update segment & relay name generators and call delete dhcprelay after deletion of segment
* address comment
* [NSX] Fix DHCP relay config deletion was missing zone name (#8068)
* [NSX] Refactor API wrapper operations (#8059)
* [NSX] Refactor API wrapper operations
* Big refactor
* Address review comment
* change network cidr to cidr to prevent NPE
* add domain and zone names to the various networks - vpc & tier
---------
Co-authored-by: Pearl Dsilva <pearl1594@gmail.com>
* Nsx unit tests (#8090)
* Add tests
* add test for NsxGuestNetworkGuru
* add unit tests for NsxResource
* add unti tests for NsxElement
* cleanup
* [NSX] Refactor API wrapper operations
* update tests
* update tests - add nsxProviderServiceImpl test
* add unit test - NsxServiceImpl
* add license
* Big refactor
* Address review comment
* change network cidr to cidr to prevent NPE
* add domain and zone names to the various networks - vpc & tier
* fix tests
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* modify NSX resource naming convention (#8095)
* modify NSX resource naming convention
* remove unused imports
* add a setup phase between desgin and implementation of a network for intermediary steps
* add method to all classes
* NSX: Refactor Network & VPC offering (#8110)
* [NSX] Refactor API wrapper operations
* Network offering changes for NSX
* fix services and provider combination
* address comments: rename param
* update nsx_mode parameter
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* fix test
* [NSX] Allow NSX isolated networks (#8132)
* Add network offerings for NSX on isolated networks
* Fix offerings creation
* In progress NSX isolated network
* Fixes
* Fix NIC allocation to router
* NSX: Add Step for Adding Public traffic network for NSX During zone creation (#8126)
* NSX: Add Step for Adding Public traffic network for NSX
* address comments and cleanup
* address comment
* remove indent
* NSX: Create and Delete static NAT & Port forward rules (#8131)
* NSX: Create and delete NSX Static Nat rules
* fix issues with static nat
* add static nat
* Support to add and delete Port forward rules
* add license
* fix adding multiple pf rules
* cleanup
* fix lint check
* fix smoke tests
* fix smoke tests
* Nsx add lb rule (#8161)
* NSX: Create and delete NSX Static Nat rules
* fix issues with static nat
* add static nat
* Support to add and delete Port forward rules
* add license
* fix adding multiple pf rules
* cleanup
* NSX: Add support to create and delete Load balancer rules
* fix deletion of lb rules
* add header file and update protocol detail
* build failure fix
* [NSX] Add SNAT support (#8100)
* In progress add source NAT
* Fix after merge
* Fix tests
* Fix NPE on isolated network deletion
* Reserve source NAT IP when its not passed for NSX VPC
* Create source NAT rule on VR NIC allocation
* Fix update VPC and remove VPC to update and remove SNAT rule
* Fix packaging
* Address review comment
* Fix build
* fix build - unused import
* Add defensive checks
* Add missing design to NSX public guru
---------
Co-authored-by: Pearl Dsilva <pearl1594@gmail.com>
* NSX: Fix VR public NIC allocation (#8166)
* NSX: fix LB member addition and deletion and add defensive checks (#8167)
* Fix public NIC NPE on broadcast URI
* NSX: Router Public nic to get IP from systemVM Ip range (#8172)
* NSX: Router Public nic to get IP from systemVM Ip range
* Fix VR IP address and setSourceNatIp command
* NSX: hide systemVM reserved IP range SourceNAT
* fix test
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* fix test failure
* test failure fix
* [NSX] Fix update source NAT IP (#8176)
* [NSX] Fix update source NAT IP
* Fix startup
* Fix API result
* NSX - add LB route Advertizement (#8192)
* [NSX] Add ACL types support (#8224)
* NSX: Create segment group on segment creation
* Add unit tests
* Remove group for segment before removing segment
* Create Distributed Firewall rules
* Remove distributed firewall policy on segment deletion
* Fix policy rule ID and add more unit tests
* Fix DROP action rules and transform tests
* Add new ACL rules
* Fixes
* associate security policies with groups and not to DFW and add deletion of rules
* Fix name convention
---------
Co-authored-by: Pearl Dsilva <pearl1594@gmail.com>
* NSX: Fix creation of VPCs (#8320)
* Fix ACL rules creation (#8323)
* [NSX] Fix database views (#8325)
* NSX: Add CKS Support & Firewall rules for Isolated Networks (#8189)
* NSX: Add ALL LB IP to the list of route advertisements in tier1
* NSX: Support Source NAT on NSX Isolated networks
* NSX: Cks Support
* NSX: Create segment group on segment creation
* Add unit tests
* Remove group for segment before removing segment
* Create Distributed Firewall rules
* Remove distributed firewall policy on segment deletion
* Fix policy rule ID and add more unit tests
* Add support for routed NSX Isolated networks \n and non RFC 1918 compliant IPs
* Add support for routed NSX Isolated networks \n and non RFC 1918 compliant IPs
* Add Firewall rules
* build failure - fix unit test
* fix npes
* Add support to delete firewall rules
* update nsx cks offering
* add license
* update order of ports in PF & FW rules
* fix filter for getting transport zones
* CKS support changed - MTU updated, etc
* add LB for CKS on VPC
* address comments
* adapt upstream cks logic for vpc
* rever mtu hack
* update UI changes as per upstream fix
* change display test for CKS n/w offerings for isolated and VPC tiers
* add extra line for linter
* address comment
* revert list change
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* fix ui build failure
* [NSX] Address SonarCloud Bugs (#8341)
* [NSX] Address SonarCloud Bugs
* Fix NSX API connection issues
* NSX: Add unit tests to increase coverage (#8355)
* NSX: Add unit tests
* cleanup unused imports
* add more unit tests
* add tests for publicnsxnetworkguru
* add license
* fix build failures
* address sonar comment
* fix security hotspots
* NSX: Add more unit tests (#8381)
* NSX : Unit tests
* remove unused imports
* remove unused import causing build failure
* fix build failures due to unused imports
* fix build failure
* fix test assertion
* remove unused imports
* remove unused import
* Nsx UI zone bug (#8398)
* NSX: Attempt to fix NSX Zone creation bug for public networks
* fix zone wizard public traffic issue
* add proper filtering of offerings based on VPC nsx mode
* clean up console logs
* NSX: Fix code smells and reported bugs (#8409)
* NSX: Fix code smells and reported bugs
* fox override issue
* remove unused imports
* fix test
* refactor code to reduce complexity
* add lisence
* cleanup
* fix build failure
* fix build failure
* address comments
* test - add config to ignore certain files from test coverage
* test exclusion of classes from test cov
* rever pom changes
* [NSX] Add more unit tests (#8431)
* [NSX] Add more unit tests
* More tests
* Fix build errors
* NSX: Prevent creation of L2 and Shared networks for NSX (#8463)
* NSX: Prevent creation of L2 and Shared networks for NSX
* add checks to backend to prevent creation of l2 and shared networks in nsx zones and filter only nsx offerings when creating isolated networks
* cleanup
* NSX: Fix code smells (#8436)
* NSX: Fix code smells
* Add changes to service creation logic
* CKS: Add action to during firewall rule creation (#8498)
* NSX,UI: Deduplicate network list when creating kubernetes clusters (#8513)
* NSX: Make LB service selectable in network offering (#8512)
* NSX: Make LB service selectable in network offering
* fix label
* address comments
* address comments
* NSX: Add appropriate error message when icmp type is set to -1 for NSX (#8504)
* NSX: Add appropriate error message when icmp type is set to -1 for NSX
* address comments
* update text
* fix test
* fix test - build failure
* fix test - build failure
* NSX: Cleanup NSX resources during k8s cluster cleanup (#8528)
* fix test failure
* NSX: Improve segment deletion process (#8538)
* NSX: Add passive monitor for NSX LB to test whether a server is available (#8533)
* NSX: Add passive monitor for NSX LB to test whether a server is available
* Add active monitors too
* fix build failure
* NSX: Add check for ICMP code / type for NSX zones (#8542)
* NSX: Fix Routed Mode for Isolated and VPC networks (#8534)
* NSX: Fix Routed Mode for Isolated and VPC networks
* NSX: Fix Routed mode - add checks for ports added for FW rules
* clean up code
* fix build failure
* NSX: Add retry logic with sleep to delete segments (#8554)
* NSX: Add retry logic with sleep to delete segments
* add logs
* NSX: Fix custom ACL check (#2)
* NSX: Fix custom ACL check
* NSX: Fix custom ACL check
* Nsx vpc routed mode (#5)
* NSX: Fix VPC routed mode
* NSX: VPC route mode
* remove unnecessary changes
* Nsx: Support internal LB (#4)
* NSX: Support internal LB service in NSX
* add lb removal logic
* Fix UI issue hiding internal LB tab
* Refactor method name
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* NSX: Improve NSX resource cleanup process (#3)
* Fix unit test
* NSX: Add SourceNAT service to the default Routed offering for VPC (#13)
* Fix VPC restart with cleanup (#12)
* NSX: Fix ACL rule removal on replacement and fix rule order (#11)
* NSX: fix smoke test failure for ACLs (#9)
* Fix unit tests
* Fix NSX plugin pom XML
* NSX: Add support to re-order ACL rules (NSX FW rules) (#14)
* [WIP] NSX: Add support to re-order ACL rules (NSX FW rules)
* fix reordering of acl rules on all networks that it is associated to
* clean up and attempt test fix
* Fix tests
* Remove unused import
* tweak reorder logic
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
* Fix zone creation issue for internal load balancer
* Fix
* Fix unit test
* fix logger
* fix logger
* fix logger
* NSX: Fix VPC form to ignore source NAT IP when creating VPCs and fix label
* Move SQL changes to the newest schema file
* NSX: Last Fixes
* Fix build
---------
Co-authored-by: nvazquez <nicovazquez90@gmail.com>
This PR provides a new primary storage volume type called "FiberChannel" that allows access to volumes connected to hosts over fiber channel connections. It requires Multipath to provide path discovery and failover. Second, the PR adds an AdaptivePrimaryDatastoreProvider that abstracts how volumes are managed/orchestrated from the connector to communicate with the primary storage provider, using a ProviderAdapter interface, allowing the code interacting with the primary storage provider API's to be simpler and have no direct dependencies on Cloudstack code. Lastly, the PR provides an implementation of the ProviderAdapter classes for the HP Enterprise Primera line of storage solutions and the Pure Flash Array line of storage solutions.
OAuth2, the industry-standard authorization or authentication framework, simplifies the process of
granting access to resources. CloudStack supports OAuth2 authentication wherein users can login into
CloudStack without using a username and password. Support for Google and Github providers has been added.
Other OAuth2 providers can be easily integrated with CloudStack using its plugin framework.
The login page will show provider options when the OAuth2 is enabled and corresponding providers are configured.
"OAuth configuration" sub-section is present under "Configuration" where admins can register the corresponding
OAuth providers.
This pull request (PR) implements a Distributed Resource Scheduler (DRS) for a CloudStack cluster. The primary objective of this feature is to enable automatic resource optimization and workload balancing within the cluster by live migrating the VMs as per configuration.
Administrators can also execute DRS manually for a cluster, using the UI or the API.
Adds support for two algorithms - condensed & balanced. Algorithms are pluggable allowing ACS Administrators to have customized control over scheduling.
Implementation
There are three top level components:
Scheduler
A timer task which:
Generate DRS plan for clusters
Process DRS plan
Remove old DRS plan records
DRS Execution
We go through each VM in the cluster and use the specified algorithm to check if DRS is required and to calculate cost, benefit & improvement of migrating that VM to another host in the cluster. On the basis of cost, benefit & improvement, the best migration is selected for the current iteration and the VM is migrated. The maximum number of iterations (live migrations) possible on the cluster is defined by drs.iterations which is defined as a percentage (as a value between 0 and 1) of total number of workloads.
Algorithm
Every algorithms implements two methods:
needsDrs - to check if drs is required for cluster
getMetrics - to calculate cost, benefit & improvement of a migrating a VM to another host.
Algorithms
Condensed - Packs all the VMs on minimum number of hosts in the cluster.
Balanced - Distributes the VMs evenly across hosts in the cluster.
Algorithms use drs.level to decide the amount of imbalance to allow in the cluster.
APIs Added
listClusterDrsPlan
id - ID of the DRS plan to list
clusterid - to list plans for a cluster id
generateClusterDrsPlan
id - cluster id
iterations - The maximum number of iterations in a DRS job defined as a percentage (as a value between 0 and 1) of total number of workloads. Defaults to value of cluster's drs.iterations setting.
executeClusterDrsPlan
id - ID of the cluster for which DRS plan is to be executed.
migrateto - This parameter specifies the mapping between a vm and a host to migrate that VM. Format of this parameter: migrateto[vm-index].vm=<uuid>&migrateto[vm-index].host=<uuid>.
Config Keys Added
ClusterDrsPlanExpireInterval
Key drs.plan.expire.interval
Scope Global
Default Value 30 days
Description The interval in days after which old DRS records will be cleaned up.
ClusterDrsEnabled
Key drs.automatic.enable
Scope Cluster
Default Value false
Description Enable/disable automatic DRS on a cluster.
ClusterDrsInterval
Key drs.automatic.interval
Scope Cluster
Default Value 60 minutes
Description The interval in minutes after which a periodic background thread will schedule DRS for a cluster.
ClusterDrsIterations
Key drs.max.migrations
Scope Cluster
Default Value 50
Description Maximum number of live migrations in a DRS execution.
ClusterDrsAlgorithm
Key drs.algorithm
Scope Cluster
Default Value condensed
Description DRS algorithm to execute on the cluster. This PR implements two algorithms - balanced & condensed.
ClusterDrsLevel
Key drs.imbalance
Scope Cluster
Default Value 0.5
Description Percentage (as a value between 0.0 and 1.0) of imbalance allowed in the cluster. 1.0 means no imbalance
is allowed and 0.0 means imbalance is allowed.
ClusterDrsMetric
Key drs.imbalance.metric
Scope Cluster
Default Value memory
Description The cluster imbalance metric to use when checking the drs.imbalance.threshold. Possible values are memory and cpu.
* StorPool storage plugin
Adds volume storage plugin for StorPool SDS
* Added support for alternative endpoint
Added option to switch to alternative endpoint for SP primary storage
* renamed all classes from Storpool to StorPool
* Address review
* removed unnecessary else
* Removed check about the storage provider
We don't need this check, we'll get if the snapshot is on StorPool be
its name from path
* Check that current plugin supports all functionality before upgrade CS
* Smoke tests for StorPool plug-in
* Fixed conflicts
* Fixed conflicts and added missed Apache license header
* Removed whitespaces in smoke tests
* Added StorPool plugin jar for Debian
the StorPool jar will be included into cloudstack-agent package for
Debian/Ubuntu
This adds a volume(primary) storage plugin for the Linstor SDS.
Currently it can create/delete/migrate volumes, snapshots should be possible,
but currently don't work for RAW volume types in cloudstack.
* plugin-storage-volume-linstor: notify libvirt guests about the resize
Added support for PowerFlex/ScaleIO (v3.5 onwards) storage pool as a primary storage in CloudStack (for KVM hypervisor) and enabled VM/Volume operations on that pool (using pool tag).
Please find more details in the FS here:
https://cwiki.apache.org/confluence/x/cDl4CQ
Documentation PR: apache/cloudstack-documentation#169
This enables support for PowerFlex/ScaleIO (v3.5 onwards) storage pool as a primary storage in CloudStack
Other improvements addressed in addition to PowerFlex/ScaleIO support:
- Added support for config drives in host cache for KVM
=> Changed configuration "vm.configdrive.primarypool.enabled" scope from Global to Zone level
=> Introduced new zone level configuration "vm.configdrive.force.host.cache.use" (default: false) to force host cache for config drives
=> Introduced new zone level configuration "vm.configdrive.use.host.cache.on.unsupported.pool" (default: true) to use host cache for config drives when storage pool doesn't support config drive
=> Added new parameter "host.cache.location" (default: /var/cache/cloud) in KVM agent.properties for specifying the host cache path and create config drives on the "/config" directory on the host cache path
=> Maintain the config drive location and use it when required on any config drive operation (migrate, delete)
- Detect virtual size from the template URL while registering direct download qcow2 (of KVM hypervisor) templates
- Updated full deployment destination for preparing the network(s) on VM start
- Propagate the direct download certificates uploaded to the newly added KVM hosts
- Discover the template size for direct download templates using any available host from the zones specified on template registration
=> When zones are not specified while registering template, template size discovery is performed using any available host, which is picked up randomly from one of the available zones
- Release the VM resources when VM is sync-ed to Stopped state on PowerReportMissing (after graceful period)
- Retry VM deployment/start when the host cannot grant access to volume/template
- Mark never-used or downloaded templates as Destroyed on deletion, without sending any DeleteCommand
=> Do not trigger any DeleteCommand for never-used or downloaded templates as these doesn't exist and cannot be deleted from the datastore
- Check the router filesystem is writable or not, before performing health checks
=> Introduce a new test "filesystem.writable.test" to check the filesystem is writable or not
=> The router health checks keeps the config info at "/var/cache/cloud" and updates the monitor results at "/root" for health checks, both are different partitions. So, test at both the locations.
=> Added new script: "filesystem_writable_check.py" at /opt/cloud/bin/ to check the filesystem is writable or not
- Fixed NPE issue, template is null for DATA disks. Copy template to target storage for ROOT disk (with template id), skip DATA disk(s)
* Addressed some issues for few operations on PowerFlex storage pool.
- Updated migration volume operation to sync the status and wait for migration to complete.
- Updated VM Snapshot naming, for uniqueness in ScaleIO volume name when more than one volume exists in the VM.
- Added sync lock while spooling managed storage template before volume creation from the template (non-direct download).
- Updated resize volume error message string.
- Blocked the below operations on PowerFlex storage pool:
-> Extract Volume
-> Create Snapshot for VMSnapshot
* Added the PowerFlex/ScaleIO client connection pool to manage the ScaleIO gateway clients, which uses a single gateway client per Powerflex/ScaleIO storage pool and renews it when the session token expires.
- The token is valid for 8 hours from the time it was created, unless there has been no activity for 10 minutes.
Reference: https://cpsdocs.dellemc.com/bundle/PF_REST_API_RG/page/GUID-92430F19-9F44-42B6-B898-87D5307AE59B.html
Other fixes included:
- Fail the VM deployment when the host specified in the deployVirtualMachine cmd is not in the right state (i.e. either Resource State is not Enabled or Status is not Up)
- Use the physical file size of the template to check the free space availability on the host, while downloading the direct download templates.
- Perform basic tests (for connectivity and file system) on router before updating the health check config data
=> Validate the basic tests (connectivity and file system check) on router
=> Cleanup the health check results when router is destroyed
* Updated PowerFlex/ScaleIO storage plugin version to 4.16.0.0
* UI Changes to support storage plugin for PowerFlex/ScaleIO storage pool.
- PowerFlex pool URL generated from the UI inputs(Gateway, Username, Password, Storage Pool) when adding "PowerFlex" Primary Storage
- Updated protocol to "custom" for PowerFlex provider
- Allow VM Snapshot for stopped VM on KVM hypervisor and PowerFlex/ScaleIO storage pool
and Minor improvements in PowerFlex/ScaleIO storage plugin code
* Added support for PowerFlex/ScaleIO volume migration across different PowerFlex storage instances.
- findStoragePoolsForMigration API returns PowerFlex pool(s) of different instance as suitable pool(s), for volume(s) on PowerFlex storage pool.
- Volume(s) with snapshots are not allowed to migrate to different PowerFlex instance.
- Volume(s) of running VM are not allowed to migrate to other PowerFlex storage pools.
- Volume migration from PowerFlex pool to Non-PowerFlex pool, and vice versa are not supported.
* Fixed change service offering smoke tests in test_service_offerings.py, test_vm_snapshots.py
* Added the PowerFlex/ScaleIO volume/snapshot name to the paths of respective CloudStack resources (Templates, Volumes, Snapshots and VM Snapshots)
* Added new response parameter “supportsStorageSnapshot” (true/false) to volume response, and Updated UI to hide the async backup option while taking snapshot for volume(s) with storage snapshot support.
* Fix to remove the duplicate zone wide pools listed while finding storage pools for migration
* Updated PowerFlex/ScaleIO volume migration checks and rollback migration on failure
* Fixed the PowerFlex/ScaleIO volume name inconsistency issue in the volume path after migration, due to rename failure
