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https://issues.apache.org/jira/browse/CLOUDSTACK-4618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcus Sorensen closed CLOUDSTACK-4618.
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verified
> storage refactor has broken CLVM
> --------------------------------
>
> Key: CLOUDSTACK-4618
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4618
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Storage Controller
> Affects Versions: 4.2.0
> Reporter: Marcus Sorensen
> Assignee: edison su
> Priority: Blocker
> Fix For: 4.2.0
>
>
> I see the storage refactor has broken CLVM. It looks like the process is
> doing something like:
> copy template from secondary to primary storage, then create copy of primary
> storage template as new volume
> This breaks CLVM, because it used to just do:
> copy template from secondary to primary storage as new volume
> Since we can't efficiently clone in CLVM, it expects to always copy the
> template from secondary storage, rather than copying to primary first and
> then copying the whole template from the primary back to the same disks. 1)
> because it thrashes the disks, and 2) copying the template is usually much
> faster because the template is sparse, and the logical volume is not, so
> copying a 10G template with a real size of 500M is much faster than copying a
> 10G logical volume to another 10G logical volume.
> in KVMStorageProcessor.java cloneVolumeFromBaseTemplate:
> if (primaryPool.getType() == StoragePoolType.CLVM) {
> vol = templateToPrimaryDownload(templatePath, primaryPool);
> }
> This will never work, because templateToPrimaryDownload expects secondary
> storage, and we have copied the template to primary storage and are passing
> that. e.g.:
> {
> "org.apache.cloudstack.storage.command.CopyCommand": {
> "destTO": {
> "org.apache.cloudstack.storage.to.VolumeObjectTO": {
> "accountId": 2,
> "dataStore": {
> "org.apache.cloudstack.storage.to.PrimaryDataStoreTO": {
> "host": "localhost",
> "id": 2,
> "path": "/vg0",
> "poolType": "CLVM",
> "port": 0,
> "uuid": "4e00fe65-c47e-4b85-afe8-4f97fb8689d0"
> }
> },
> "format": "QCOW2",
> "hypervisorType": "KVM",
> "id": 9,
> "name": "ROOT-9",
> "size": 1073741824,
> "uuid": "d73f3a2b-9e63-4faf-a45b-d6fcf7633793",
> "vmName": "i-2-9-VM",
> "volumeId": 9,
> "volumeType": "ROOT"
> }
> },
> "executeInSequence": true,
> "srcTO": {
> "org.apache.cloudstack.storage.to.TemplateObjectTO": {
> "accountId": 2,
> "checksum": "44cd0e6330a59f031460bc18a40c95a2",
> "displayText": "tiny",
> "format": "QCOW2",
> "hvm": true,
> "hypervisorType": "KVM",
> "id": 201,
> "imageDataStore": {
> "org.apache.cloudstack.storage.to.PrimaryDataStoreTO": {
> "host": "localhost",
> "id": 2,
> "path": "/vg0",
> "poolType": "CLVM",
> "port": 0,
> "uuid": "4e00fe65-c47e-4b85-afe8-4f97fb8689d0"
> }
> },
> "name": "201-2-a04f958e-0aed-3642-960f-a675a2ee1c44",
> "origUrl":
> "http://mirrors.betterservers.com/template/tiny-centos-63.qcow2";,
> "path": "c8da0364-6f94-4c71-9c1d-74078e55bbb8",
> "uuid": "7dcdb1fb-e7e3-4de0-bf93-13d3e6c4ade5"
> }
> },
> "wait": 0
> }
> }
> Also, format should be 'RAW', I believe, not 'QCOW2'.
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