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Need advise/help/ideas to implement a two sites disaster-recovery with ovirt
by wodel youchi 21 Nov '17

21 Nov '17

Hi, We want to implement two sites with ovirt and have disaster-recovery, if site one is unreachable, then site two takes-over. We will be using iSCSI for Data domains Our initial idea is : - install the first site : - self-hosted engine - iscsi blocks for data domains - install the second site: - self-hosted engine. - iscsi blocks for data domain. Use the snapshot synchronization of the disk-array to sync iscsi blocks/volumes. The two self-hosted engine will be independent. In case of a failure : - break the synchronization - Access the data domain in site two - start the VMs. oVirt does not manage replication of VMs itself, someone may argue that it's not it's purpose, but what about selecting the VMs to replicate?? in case of NFS we may (I don't know really if it's possible) have some access to the VMs disk files, but in block mode with LVM in it, things become complicated. So if someone has implemented such architecture, could you please share the experience, give advice and ideas on how to best implement this. Regards. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Garanti sans virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Issue with ovirt-ansible-roles
by Luca 'remix_tj' Lorenzetto 21 Nov '17

21 Nov '17

Hello, i'm playing with ovirt-ansible-roles for building a standard configuration to be applied to all my ovirt setups. I downloaded ovirt-ansible-roles 1.1.1 from github and unpacked examples, playbooks and roles on a directory (/ansible/ovirt-ansible-roles/). I created then this playbook: ==8<==8<==8<==8<==8<== ovirt_infra.yml ==8<==8<==8<==8<==8<==8<=== --- - name: oVirt infra hosts: localhost connection: local gather_facts: false vars_files: - ovirt_infra_vars.yml - passwords.yml pre_tasks: - name: Login to oVirt ovirt_auth: url: "{{ engine_url }}" username: "{{ engine_user }}" password: "{{ engine_password }}" ca_file: "{{ engine_cafile | default(omit) }}" insecure: "{{ engine_insecure | default(true) }}" tags: - always - name: Generate Hosts list set_fact: hosts: "{{ hosts|default([]) + [ {'name': item.key, 'address': item.key, 'cluster': item.value.cluster, 'password': item.value.password|default('defaultpwd') } ] }}" with_dict: "{{ hosts_map }}" roles: - ovirt-infra post_tasks: - name: Logout from oVirt ovirt_auth: state: absent ovirt_auth: "{{ ovirt_auth }}" tags: - always ==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<=== file passwords.yml declares engine_password, ovirt_infra_vars.yml instead contain this vars: ==8<==8<==8<==8<==8<==8<== ovirt_infra_vars.yml ==8<==8<==8<==8<==8<=== --- engine_url: https://ovirtengine.intranet.company/ovirt-engine/api engine_user: admin@internal engine_insecure: True compatibility_version: 4.1 data_center_name: Default hosts_map: fltiovirt001.intranet.company: cluster: production clusters: - name: production cpu_type: Intel Westmere Family profile: production ==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<==8<=== I did some pre-flight checks and everything seems ok: playbooks > ansible --version ansible 2.4.0.0 config file = /ansible/ovirt-ansible-roles/playbooks/ansible.cfg configured module search path = [u'/home/remixtj/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python2.7/site-packages/ansible executable location = /usr/bin/ansible python version = 2.7.5 (default, May 3 2017, 07:55:04) [GCC 4.8.5 20150623 (Red Hat 4.8.5-14)] playbooks > rpm -qa python-ovirt* python-ovirt-engine-sdk4-4.1.6-1.el7ev.x86_64 So i hope that everything goes smooth, but... playbooks > ansible-playbook ovirt_infra.yml [DEPRECATION WARNING]: The use of 'include' for tasks has been deprecated. Use 'import_tasks' for static inclusions or 'include_tasks' for dynamic inclusions. This feature will be removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg. [DEPRECATION WARNING]: include is kept for backwards compatibility but usage is discouraged. The module documentation details page may explain more about this rationale.. This feature will be removed in a future release. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg. PLAY [oVirt infra] *********************************************************************************************************************************** TASK [Login to oVirt] ******************************************************************************************************************************** ok: [localhost] TASK [Generate Hosts list] *************************************************************************************************************************** ok: [localhost] => (item={'key': u'fltiovirt001.intranet.company, 'value': {u'cluster': u'production'}}) TASK [ovirt-mac-pools : set mac pools] *************************************************************************************************************** TASK [ovirt-datacenters : Add data center] *********************************************************************************************************** An exception occurred during task execution. To see the full traceback, use -vvv. The error was: Error: Failed to read response. [DEPRECATION WARNING]: The 'ovirt_datacenters' module is being renamed 'ovirt_datacenter'. This feature will be removed in version 2.8. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg. fatal: [localhost]: FAILED! => {"changed": false, "failed": true, "msg": "Failed to read response."} PLAY RECAP ******************************************************************************************************************************************* localhost : ok=2 changed=0 unreachable=0 failed=1 If i run with -vvv i get this traceback and details when running the task TASK [ovirt-datacenters : Add data center] The full traceback is: Traceback (most recent call last): File "/tmp/ansible_mmZ02F/ansible_module_ovirt_datacenters.py", line 215, in main ret = clusters_module.create() File "/tmp/ansible_mmZ02F/ansible_modlib.zip/ansible/module_utils/ovirt.py", line 537, in create entity = self.search_entity(search_params) File "/tmp/ansible_mmZ02F/ansible_modlib.zip/ansible/module_utils/ovirt.py", line 773, in search_entity entity = search_by_attributes(self._service, name=self._module.params['name']) File "/tmp/ansible_mmZ02F/ansible_modlib.zip/ansible/module_utils/ovirt.py", line 230, in search_by_attributes search=' and '.join('{}={}'.format(k, v) for k, v in kwargs.items()) File "/usr/lib64/python2.7/site-packages/ovirtsdk4/services.py", line 4453, in list return self._internal_get(headers, query, wait) File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line 202, in _internal_get return future.wait() if wait else future File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line 52, in wait response = self._connection.wait(self._context) File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 460, in wait return self.__wait(context, failed_auth) File "/usr/lib64/python2.7/site-packages/ovirtsdk4/__init__.py", line 468, in __wait raise Error("Failed to read response.") Error: Failed to read response. [DEPRECATION WARNING]: The 'ovirt_datacenters' module is being renamed 'ovirt_datacenter'. This feature will be removed in version 2.8. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg. fatal: [localhost]: FAILED! => { "changed": false, "failed": true, "invocation": { "module_args": { "comment": null, "compatibility_version": "4.1", "description": null, "fetch_nested": false, "local": false, "mac_pool": null, "name": "Default", "nested_attributes": [], "poll_interval": 3, "quota_mode": null, "state": "present", "timeout": 180, "wait": true } }, "msg": "Failed to read response." } What's wrong with the response? The engine i want to manage is running oVirt Engine Version: 4.1.0.3-1.el7.centos I can upgrade, but i'd like also to test the playbook for upgrading the infrastructure... Luca -- "E' assurdo impiegare gli uomini di intelligenza eccellente per fare calcoli che potrebbero essere affidati a chiunque se si usassero delle macchine" Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716) "Internet è la più grande biblioteca del mondo. Ma il problema è che i libri sono tutti sparsi sul pavimento" John Allen Paulos, Matematico (1945-vivente) Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca(a)gmail.com>

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Re: [ovirt-users] Some tests results: lustrefs over nfs on VM
by Yaniv Kaul 21 Nov '17

21 Nov '17

On Nov 19, 2017 11:05 PM, "Arman Khalatyan" <arm2arm(a)gmail.com> wrote: hi Yaniv, yes for sure I hit some cache in between but not the vm cache, it has a 4GB ram, with oflag=direct I get about 120MB/s for the data analysis the cache is our friend:) The backend is a lustrefs 2.10.x. yes we have dedicated 10G on the hosts, where we can limit the vm interface to 10Gbit? Define QoS on the NIC. But I think you wish to limit IO, no? Y. Am 19.11.2017 8:33 nachm. schrieb "Yaniv Kaul" <ykaul(a)redhat.com>: On Sun, Nov 19, 2017 at 7:08 PM, Arman Khalatyan <arm2arm(a)gmail.com> wrote: > Hi, in our environment we got pretty good io performance on VM, with > following configuration: > lustrebox: /lust mounted on "GATEWAY" over IB > GATEWAY: export /lust as nfs4 on 10G interface > VM(test.vm): import as NFS over 10G interface > > [root(a)test.vm <root(a)gans.vm> ~]# dd if=/dev/zero bs=128K count=100000 > Without oflag=direct, you are hitting (somewhat) the cache. > > of=/test/tmp/test.tmp > 100000+0 records in > 100000+0 records out > 13107200000 <(310)%20720-0000> bytes (13 GB) copied, 20.8402 s, 629 MB/s > looks promising for the future deployments. > Very - what's the backend storage? > > only one problem remains that on heavy io I get some wornings that the vm > network is saturated, are there way to configure the bandwidth limits to > 10G for the VM Interface?? > Yes, but you really need a dedicated storage interface, no? Y. > > > thank you beforehand, > Arman. > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > >

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Openshift in VMs created from oVirt
by Wayna Runa 21 Nov '17

21 Nov '17

Hi there!, I've oVirt running and providing several VMs (CentOS and RedHat), now I want to provide VMs with minimalist Openshift cluster running inside to developers. Minishift creates a VM with Openshift locally, that is fine, but now we have oVirt to provide VMs which the developers can get access remotely. How I can use oVirt to do that?. Thanks in advance. -- *Wayna Runa*

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After trying to use OVS can't recover a node to use ovirtmgmt
by Juan Manuel Nieto 21 Nov '17

21 Nov '17

Hello, I've unsucessfully tried in a node to use ovs, now I want to switch back to use ovirtmgmt but I cant. for some reason my node is not operational and I have the following on ovirt-engine.log: ------------------------------0---------------> ERROR [org.ovirt.engine.core.bll.SetNonOperationalVdsCommand] (DefaultQuartzScheduler7) [1472e53b] Host 'labarq01.lda' is set to Non-Operational, it is missing the following networks: 'ovirtmgmt' <------------------------------0------------------- When I was installing OVS for some reason the ovirtmgmt was removed I recreated it and its functional. 5: ovirtmgmt: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000 link/ether a0:8c:fd:c7:1a:00 brd ff:ff:ff:ff:ff:ff inet 10.3.38.11/24 brd 10.3.38.255 scope global ovirtmgmt valid_lft forever preferred_lft forever inet6 fe80::a28c:fdff:fec7:1a00/64 scope link valid_lft forever preferred_lft forever root@labarq01 ovirt-engine]# cat /etc/sysconfig/network-scripts/ifcfg-ovirtmgmt # Generated by VDSM version 4.19.31-1.el7.centos DEVICE=ovirtmgmt TYPE=Bridge DELAY=0 STP=off ONBOOT=yes IPADDR=10.3.38.11 NETMASK=255.255.255.0 GATEWAY=10.3.38.1 BOOTPROTO=none MTU=1500 DEFROUTE=yes NM_CONTROLLED=no IPV6INIT=yes IPV6_AUTOCONF=yes DNS1=10.12.1.110 DNS2=10.113.24.145 root@labarq01 ovirt-engine]# brctl show bridge name bridge id STP enabled interfaces ;vdsmdummy; 8000.000000000000 no ovirtmgmt 8000.a08cfdc71a00 no eno1 I'm using Centos 7 and ovirt 4.1.7 the rest of the nodes work properly. Is there any way to configure this network for this host manually? Thank you in advance. Best regards

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ovirt node and logical networks on same physical one
by Gianluca Cecchi 21 Nov '17

21 Nov '17

Hello, I'm going to setup an environment where unfortunately I will have only a flat physical class B private network available, for all my scopes. There are 2 stacked switches where the hypervisors' nics will connect to. My hypervisors will have 6 network interfaces so that potentially I could configure 3 bonds: one for mgmt, one for migration, one for VMs. But this way each hypervisor will have its mgmt ip and its migration ip on the same lan and also the IP of a VM running inside it will stay in the same lan. Is this kind of configuration feasible for a test? Any suggestion based on these constraints? If this matter, I'm going to install hypervisors as oVirt nodes Thanks, Gianluca

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Info about xeon mp dunnington support
by Gianluca Cecchi 21 Nov '17

21 Nov '17

Hello, I should start configuring a lab environment where I should have available some IBM 3850 M2 servers with E7450 Xeon cpu (also known as Dunnington). Spec page of processor here: https://ark.intel.com/it/products/36941/Intel-Xeon-Processor-E7450-12M-Cach… Can you tell me if they are compatible with oVirt 4.1 for testing; used by anyone on list? Base on this following link I presume it should be detected as Penryn from oVirt, correct? https://en.wikipedia.org/wiki/List_of_Intel_codenames I have not them physically accessible right now but I'm just moving to avoid, if possible, compatibility problems. Thanks, Gianluca

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Why was HE Install made OVA only?
by Alan Griffiths 21 Nov '17

21 Nov '17

Hi, What was the reasoning behind making Hosted Engine install OVA only? The PXEBoot feature always worked really well for me, and now I have a number of extra steps to achieve the same end result. Thanks, Alan

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Cannot remove snapshot
by Nicolas Ecarnot 21 Nov '17

21 Nov '17

Hello, oVirt 3.6.7.5-1 I'm trying to remove a snapshot in a cold way (VM shut down). It is failing, and VDSM is telling : 4f1588f3-ae2d-4702-b7e1-4ef53b5b5a1d::DEBUG::2017-11-17 13:04:11,448::lvm::290::Storage.Misc.excCmd::(cmd) SUCCESS: <err> = ' WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it!\n'; <rc> = 0 4f1588f3-ae2d-4702-b7e1-4ef53b5b5a1d::DEBUG::2017-11-17 13:04:11,456::lvm::462::Storage.LVM::(_reloadlvs) lvs reloaded 4f1588f3-ae2d-4702-b7e1-4ef53b5b5a1d::DEBUG::2017-11-17 13:04:11,456::lvm::462::Storage.OperationMutex::(_reloadlvs) Operation 'lvm reload operation' released the operation mutex 4f1588f3-ae2d-4702-b7e1-4ef53b5b5a1d::ERROR::2017-11-17 13:04:11,457::image::1302::Storage.Image::(merge) Unexpected error Traceback (most recent call last): File "/usr/share/vdsm/storage/image.py", line 1293, in merge sdDom, srcVolParams, volParams, reqSize, chain) File "/usr/share/vdsm/storage/image.py", line 1039, in _baseCowVolumeMerge unsafe=False, rollback=True) File "/usr/share/vdsm/storage/volume.py", line 278, in rebase raise se.MergeSnapshotsError(self.volUUID) MergeSnapshotsError: Error merging snapshots: ('4a8c17aa-5882-45a1-8a6e-40db39ed06ca',) I read this : https://bugzilla.redhat.com/show_bug.cgi?id=1069610 , hoping I could find some workaround. But I couldn't. If there is no abvious workaround, would there be other ways like : - find the bare logical volume, shut down the VM, and play with low level qemu-img commands. I think I knwn how to do that, but I'm worried the oVirt database won't be in sync once I've removed the snapshot or - export the VM then re-import, if this is related to some LV space missing. Then removing the snapshot the usual way. Any advice (apart the obvious upgrade-to-4.X-sir)? -- Nicolas ECARNOT

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Host Non Operational - Filed to configure management network on host Vollansicht Vollansicht
by jean.hort＠web.de 21 Nov '17

21 Nov '17

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