[sorry, this is my first time to use mailing list, repost again, with content from html to plain text] ### Description ### 1. problem 1) migrate vm {name:xyz001, mem(min, max) = (2G,4G)} from ovirt host n33 to n34, failed. 2) shutting down vm {name: test001, mem(min, max) = (1G,1G)} on n34, update test001's config: Host->Start Running On: Specific(n34), then start test001, while, it's running on n33. 2. err message Error while executing action: migrate [engine gui] xyz001: Cannot migrate VM. There is no host that satisfies current scheduling constraints. See below for details: The host n33.ovirt did not satisfy internal filter Memory because has availabe 1863 MB memory. Insufficient free memory to run the VM. The host n34.ovirt did not satisfy internal filter Memory because its swap value was illegal. [engine.log] INFO [org.ovirt.engine.core.bll.MigrateVmCommand] (default task-23) [5916aa3b] Lock Acquired to object 'EngineLock:{exclusiveLocks='[73351885-9a92-4317-baaf-e4f2bed1171a=<VM, ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName test11>]', sharedLocks='null'}' INFO [org.ovirt.engine.core.bll.scheduling.SchedulingManager] (default task-23) [5916aa3b] Candidate host 'n34' ('2ae3a219-ae9a-4347-b1e2-0e100360231e') was filtered out by 'VAR__FILTERTYPE__INTERNAL' filter 'Memory' (correlation id: null) INFO [org.ovirt.engine.core.bll.scheduling.SchedulingManager] (default task-23) [5916aa3b] Candidate host 'n33' ('688aec34-5630-478e-ae5e-9d57990804e5') was filtered out by 'VAR__FILTERTYPE__INTERNAL' filter 'Memory' (correlation id: null) WARN [org.ovirt.engine.core.bll.MigrateVmCommand] (default task-23) [5916aa3b] CanDoAction of action 'MigrateVm' failed for user admin@internal. Reasons: VAR__ACTION__MIGRATE,VAR__TYPE__VM,SCHEDULING_ALL_HOSTS_FILTERED_OUT,VAR__FILTERTYPE__INTERNAL,$hostName n33,$filterName Memory,$availableMem 1863,VAR__DETAIL__NOT_ENOUGH_MEMORY,SCHEDULING_HOST_FILTERED_REASON_WITH_DETAIL,VAR__FILTERTYPE__INTERNAL,$hostName n34,$filterName Memory,VAR__DETAIL__SWAP_VALUE_ILLEGAL,SCHEDULING_HOST_FILTERED_REASON_WITH_DETAIL INFO [org.ovirt.engine.core.bll.MigrateVmCommand] (default task-23) [5916aa3b] Lock freed to object 'EngineLock:{exclusiveLocks='[73351885-9a92-4317-baaf-e4f2bed1171a=<VM, ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName test11>]', sharedLocks='null'}' 3. DC Compatibility Version: 3.5 4. Cluster Memory Optimization: For Server Load - Allow scheduling of 150% of physical memory Memory Balloon: Enable Memory Balloon Optimization Enable KSM: Share memory pages across all available memory (best KSM effectivness) 5. HOST name: n33, n34 mem: 32G 6. VM [n33] 11 vms (min, max) = (2G,4G) = 8 (min, max) = (2G,8G) = 1 (min, max) = (2G,2G) = 2 total: 22G/44G [n34] 7 vms (min, max) = (0.5G,1G) = 1 (min, max) = (1G,2G) = 1 (min, max) = (2G,2G) = 1 (min, max) = (2G,4G) = 3 (min, max) = (8G,8G) = 1 total: 17.5G/25G -------------------------------------------- (min, max) = (2G,4G) stands for: Memory Size: 4G Physical Memory Guaranteed: 2G Memory Balloon Device Enabled: checked -------------------------------------------- 7. rpm version [root@n33 ~]# rpm -qa |grep vdsm vdsm-yajsonrpc-4.16.27-0.el6.noarch vdsm-jsonrpc-4.16.27-0.el6.noarch vdsm-cli-4.16.27-0.el6.noarch vdsm-python-zombiereaper-4.16.27-0.el6.noarch vdsm-xmlrpc-4.16.27-0.el6.noarch vdsm-python-4.16.27-0.el6.noarch vdsm-4.16.27-0.el6.x86_64 [root@engine ~]# rpm -qa |grep ovirt ovirt-release36-001-2.noarch ovirt-engine-setup-base-3.6.0.3-1.el6.noarch ovirt-engine-setup-3.6.0.3-1.el6.noarch ovirt-image-uploader-3.6.0-1.el6.noarch ovirt-engine-wildfly-8.2.0-1.el6.x86_64 ovirt-engine-setup-plugin-vmconsole-proxy-helper-3.6.0.3-1.el6.noarch ovirt-host-deploy-1.4.0-1.el6.noarch ovirt-engine-backend-3.6.0.3-1.el6.noarch ovirt-engine-webadmin-portal-3.6.0.3-1.el6.noarch ovirt-engine-jboss-as-7.1.1-1.el6.x86_64 ovirt-engine-lib-3.6.0.3-1.el6.noarch ovirt-engine-setup-plugin-ovirt-engine-common-3.6.0.3-1.el6.noarch ovirt-engine-setup-plugin-ovirt-engine-3.6.0.3-1.el6.noarch ovirt-engine-setup-plugin-websocket-proxy-3.6.0.3-1.el6.noarch ovirt-engine-sdk-python-3.6.0.3-1.el6.noarch ovirt-iso-uploader-3.6.0-1.el6.noarch ovirt-vmconsole-proxy-1.0.0-1.el6.noarch ovirt-engine-extensions-api-impl-3.6.0.3-1.el6.noarch ovirt-engine-websocket-proxy-3.6.0.3-1.el6.noarch ovirt-engine-vmconsole-proxy-helper-3.6.0.3-1.el6.noarch ebay-cors-filter-1.0.1-0.1.ovirt.el6.noarch ovirt-host-deploy-java-1.4.0-1.el6.noarch ovirt-engine-tools-3.6.0.3-1.el6.noarch ovirt-engine-restapi-3.6.0.3-1.el6.noarch ovirt-engine-3.6.0.3-1.el6.noarch ovirt-engine-extension-aaa-jdbc-1.0.1-1.el6.noarch ovirt-engine-cli-3.6.0.1-1.el6.noarch ovirt-vmconsole-1.0.0-1.el6.noarch ovirt-engine-wildfly-overlay-001-2.el6.noarch ovirt-engine-dbscripts-3.6.0.3-1.el6.noarch ovirt-engine-userportal-3.6.0.3-1.el6.noarch ovirt-guest-tools-iso-3.6.0-0.2_master.fc22.noarch ### DB ### [root@engine ~]# su postgres bash-4.1$ cd ~ bash-4.1$ psql engine engine=# select vds_id, physical_mem_mb, mem_commited, vm_active, vm_count, reserved_mem, guest_overhead, transparent_hugepages_state, pending_vmem_size from vds_dynamic; vds_id | physical_mem_mb | mem_commited | vm_active | vm_count | reserved_mem | guest_overhead | transparent_hugepages_state | pending_vmem_size --------------------------------------+-----------------+--------------+-----------+----------+--------------+----------------+-----------------------------+------------------- 688aec34-5630-478e-ae5e-9d57990804e5 | 32057 | 45836 | 11 | 11 | 321 | 65 | 2 | 0 2ae3a219-ae9a-4347-b1e2-0e100360231e | 32057 | 26120 | 7 | 7 | 321 | 65 | 2 | 0 (2 rows) ### memory ### [n33] # free -m total used free shared buffers cached Mem: 32057 31770 287 0 41 6347 -/+ buffers/cache: 25381 6676 Swap: 29999 10025 19974 Physical Memory: 32057 MB total, 25646 MB used, 6411 MB free Swap Size: 29999 MB total, 10025 MB used, 19974 MB free Max free Memory for scheduling new VMs: 1928.5 MB [n34] # free -m total used free shared buffers cached Mem: 32057 31713 344 0 78 13074 -/+ buffers/cache: 18560 13497 Swap: 29999 5098 24901 Physical Memory: 32057 MB total, 18593 MB used, 13464 MB free Swap Size: 29999 MB total, 5098 MB used, 24901 MB free Max free Memory for scheduling new VMs: 21644.5 MB ### code ### ##from: https://github.com/oVirt/ovirt-engine v3.6.0 ##from: D:\code\java\ovirt-engine\backend\manager\modules\dal\src\main\resources\bundles\AppErrors.properties VAR__DETAIL__SWAP_VALUE_ILLEGAL=$detailMessage its swap value was illegal ##from: D:\code\java\ovirt-engine\backend\manager\modules\bll\src\main\java\org\ovirt\engine\core\bll\scheduling\policyunits\MemoryPolicyUnit.java #-----------code--------------1# private boolean isVMSwapValueLegal(VDS host) { if (!Config.<Boolean> getValue(ConfigValues.EnableSwapCheck)) { return true; } (omitted..) return ((swap_total - swap_free - mem_available) * 100 / physical_mem_mb) <= Config.<Integer> getValue(ConfigValues.BlockMigrationOnSwapUsagePercentage) (omitted..) } #-----------code--------------1# if EnableSwapCheck = False then return True, so we can simply disable this option? Any Suggestion? [root@engine ~]# engine-config --get BlockMigrationOnSwapUsagePercentage BlockMigrationOnSwapUsagePercentage: 0 version: general so,, Config.<Integer> getValue(ConfigValues.BlockMigrationOnSwapUsagePercentage) = 0 so,, (swap_total - swap_free - mem_available) * 100 / physical_mem_mb <= 0 so,, swap_total - swap_free - mem_available <= 0 right? so,, if (swap_total - swap_free) <= mem_available then return True else return False #-----------code--------------2# for (VDS vds : hosts) { if (!isVMSwapValueLegal(vds)) { log.debug("Host '{}' swap value is illegal", vds.getName()); messages.addMessage(vds.getId(), EngineMessage.VAR__DETAIL__SWAP_VALUE_ILLEGAL.toString()); continue; } if (!memoryChecker.evaluate(vds, vm)) { int hostAavailableMem = SlaValidator.getInstance().getHostAvailableMemoryLimit(vds); log.debug("Host '{}' has {} MB available. Insufficient memory to run the VM", vds.getName(), hostAavailableMem); messages.addMessage(vds.getId(), String.format("$availableMem %1$d", hostAavailableMem)); messages.addMessage(vds.getId(), EngineMessage.VAR__DETAIL__NOT_ENOUGH_MEMORY.toString()); continue; } (omitted..) } #-----------code--------------2# !isVMSwapValueLegal then throw exception, right? so,, when we migrate vm from n33 to n34, the swap status on n34 actually is: (swap_total - swap_free) > mem_available swap_used > mem_available? confused... so,, the logic is: 1) check n33: swap[passed], then memory[failed], then goto (for..continue..loop) 2) check n34: swap[failed], then goto (for..continue..loop) If I have misunderstood anything, please let me know. ### conclusion ### 1) n33 do not have enough memory. [yes, I know that.] 2) n34 memory is illegal [why and how to solve it?] 3) what I tried: --change config: BlockMigrationOnSwapUsagePercentage [root@engine ~]# engine-config --set BlockMigrationOnSwapUsagePercentage=75 -cver general [root@engine ~]# engine-config --get BlockMigrationOnSwapUsagePercentage BlockMigrationOnSwapUsagePercentage: 75 version: general Result: failed. --disable EnableSwapCheck How? Option not found from 'engine-config --list', should I update table field direct from db? --disk swap partition on host Should I do this operation? --update ovirt-engine? No useful infomation found in latest release note, should I do this operation? ### help ### any help would be appreciated. ZYXW. Reference http://www.ovirt.org/Sla/FreeMemoryCalculation http://lists.ovirt.org/pipermail/users/2012-November/010858.html http://lists.ovirt.org/pipermail/users/2013-March/013201.html http://comments.gmane.org/gmane.comp.emulators.ovirt.user/19288 http://jim.rippon.me.uk/2013/07/ovirt-testing-english-instructions-for.html