----- Original Message -----
> From: "Yedidyah Bar David" <d...@redhat.com>
> To: "John Florian" <jflor...@doubledog.org>, "Alon Bar-Lev" 
> <alo...@redhat.com>, "Roy Golan" <rgo...@redhat.com>,
> "Eli Mesika" <emes...@redhat.com>
> Cc: "users" <users@ovirt.org>
> Sent: Tuesday, November 10, 2015 10:39:27 AM
> Subject: Re: [ovirt-users] Moving a Hosted Engine from Fedora 20 to CentOS 7
> 
> On Tue, Nov 10, 2015 at 2:16 AM, John Florian <jflor...@doubledog.org> wrote:
> > On 11/09/2015 06:25 PM, John Florian wrote:
> >> I don't think it has anything to do with name resolution either. I
> >> believe the telltale clue is this bit... 2015-11-09 18:22:31,738 WARN
> >> [org.apache.sshd.client.session.ClientSessionImpl] (pool-20-thread-3)
> >> Exception caught: java.lang.IllegalStateException: Unable to negotiate
> >> key exchange for kex algorithms (client: diffie-hellman-group1-sha1 /
> >> server:
> >> curve25519-sha...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1)
> >> As mentioned, I can ssh from my engine to the host just fine. It
> >> appears that the Java-based ssh client however cannot.
> >
> > I got past the above problem by adding the following line to the
> > /etc/ssh/sshd_config of the new F22 host:
> >
> > KexAlgorithms
> > curve25519-sha...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
> >
> > This represents the defaults for F22 -- at least according to
> > sshd_config(5) -- but with the addition of diffie-hellman-group1-sha1
> > that the Java-based ssh client seems insistent on using.
> >
> 
> Adding Alon for this. Not sure if we can configure the java ssh client
> and how.
> 

I think that newer than apache-sshd-0.14 altered its behavior, can you please 
try to downgrade to apache-sshd-0.13 and see if it helps, if it does we will 
enforce it. Only in apache-sshd-1.1.0 (unreleased) we will be able to migrate 
properly (I hope).

> > However, all is not rosy.  The deploy script ground to a halt with:
> > [ INFO  ] Waiting for the host to become operational in the engine. This
> > may take several minutes...
> >           The host hosted_engine_2 is in non-operational state.
> >           Please try to activate it via the engine webadmin UI.
> >           Retry checking host status or ignore this and continue (Retry,
> > Ignore)[Retry]?
> >
> > So I did as suggested and tried to activate the host from the webadmin
> > UI.  That didn't work either.  The status message at the bottom of the
> > browser page shows:
> >
> > Host hosted_engine_2 is installed with VDSM version (<UNKNOWN>) and
> > cannot join cluster Default which is compatible with VDSM versions
> > [4.13, 4.14, 4.9, 4.16, 4.11, 4.15, 4.12, 4.10].
> >
> > The attempt to activate the host via the web UI also caused the
> > following to be logged on the engine:
> >
> > 2015-11-09 19:12:39,828 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand] (ajp--127.0.0.1-8702-7)
> > [4bf460e8] Lock Acquired to object EngineLock [exclusiveLocks= key:
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df value: VDS
> > , sharedLocks= ]
> > 2015-11-09 19:12:39,838 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand]
> > (org.ovirt.thread.pool-8-thread-49) [4bf460e8] Running command:
> > ActivateVdsCommand internal: false. Entities affected :  ID:
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df Type: VDSAction group
> > MANIPULATE_HOST with role type ADMIN
> > 2015-11-09 19:12:39,851 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand]
> > (org.ovirt.thread.pool-8-thread-49) [4bf460e8] Before acquiring lock in
> > order to prevent monitoring for host hosted_engine_2 from data-center
> > Default
> > 2015-11-09 19:12:39,856 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand]
> > (org.ovirt.thread.pool-8-thread-49) [4bf460e8] Lock acquired, from now a
> > monitoring of host will be skipped for host hosted_engine_2 from
> > data-center Default
> > 2015-11-09 19:12:39,861 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (org.ovirt.thread.pool-8-thread-49) [4bf460e8] START,
> > SetVdsStatusVDSCommand(HostName = hosted_engine_2, HostId =
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df, status=Unassigned,
> > nonOperationalReason=NONE, stopSpmFailureLogged=false), log id: 1d206899
> > 2015-11-09 19:12:39,870 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (org.ovirt.thread.pool-8-thread-49) [4bf460e8] FINISH,
> > SetVdsStatusVDSCommand, log id: 1d206899
> > 2015-11-09 19:12:39,888 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand]
> > (org.ovirt.thread.pool-8-thread-49) Activate finished. Lock released.
> > Monitoring can run now for host hosted_engine_2 from data-center Default
> > 2015-11-09 19:12:39,892 INFO
> > [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
> > (org.ovirt.thread.pool-8-thread-49) Correlation ID: 4bf460e8, Job ID:
> > 08a2b1ad-1c1c-425c-b657-7739df72b764, Call Stack: null, Custom Event ID:
> > -1, Message: Host hosted_engine_2 was activated by admin@internal.
> > 2015-11-09 19:12:39,895 INFO
> > [org.ovirt.engine.core.bll.ActivateVdsCommand]
> > (org.ovirt.thread.pool-8-thread-49) Lock freed to object EngineLock
> > [exclusiveLocks= key: fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df value: VDS
> > , sharedLocks= ]
> > 2015-11-09 19:12:40,263 INFO
> > [org.ovirt.engine.core.vdsbroker.vdsbroker.GetHardwareInfoVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [79b24fed] START,
> > GetHardwareInfoVDSCommand(HostName = hosted_engine_2, HostId =
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df,
> > vds=Host[hosted_engine_2,fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df]), log id:
> > 7be846bb
> > 2015-11-09 19:12:40,298 INFO
> > [org.ovirt.engine.core.vdsbroker.vdsbroker.GetHardwareInfoVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [79b24fed] FINISH,
> > GetHardwareInfoVDSCommand, log id: 7be846bb
> > 2015-11-09 19:12:40,326 INFO
> > [org.ovirt.engine.core.bll.SetNonOperationalVdsCommand]
> > (DefaultQuartzScheduler_Worker-12) [5569d8a6] Running command:
> > SetNonOperationalVdsCommand internal: true. Entities affected :  ID:
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df Type: VDS
> > 2015-11-09 19:12:40,328 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [5569d8a6] START,
> > SetVdsStatusVDSCommand(HostName = hosted_engine_2, HostId =
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df, status=NonOperational,
> > nonOperationalReason=NETWORK_UNREACHABLE, stopSpmFailureLogged=false),
> > log id: 56456697
> > 2015-11-09 19:12:40,330 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [5569d8a6] FINISH,
> > SetVdsStatusVDSCommand, log id: 56456697
> > 2015-11-09 19:12:40,332 ERROR
> > [org.ovirt.engine.core.bll.SetNonOperationalVdsCommand]
> > (DefaultQuartzScheduler_Worker-12) [5569d8a6] Host hosted_engine_2 is
> > set to Non-Operational, it is missing the following networks: ovirtmgmt
> > 2015-11-09 19:12:40,335 WARN
> > [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
> > (DefaultQuartzScheduler_Worker-12) [5569d8a6] Correlation ID: 5569d8a6,
> > Job ID: 98718a7b-4f64-4a3d-bb72-e6d46100edc5, Call Stack: null, Custom
> > Event ID: -1, Message: Host hosted_engine_2 does not comply with the
> > cluster Default networks, the following networks are missing on host:
> > 'ovirtmgmt'
> 
> Didn't you see this one anywhere? There was some problem creating the
> bridge, or something else making the engine think so.
> 
> If it seems ok to you, perhaps check also vdsm logs.
> 
> > 2015-11-09 19:12:40,341 INFO
> > [org.ovirt.engine.core.bll.HandleVdsCpuFlagsOrClusterChangedCommand]
> > (DefaultQuartzScheduler_Worker-12) [a4459ff] Running command:
> > HandleVdsCpuFlagsOrClusterChangedCommand internal: true. Entities
> > affected :  ID: fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df Type: VDS
> > 2015-11-09 19:12:40,383 INFO
> > [org.ovirt.engine.core.vdsbroker.vdsbroker.GetHardwareInfoVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [a4459ff] START,
> > GetHardwareInfoVDSCommand(HostName = hosted_engine_2, HostId =
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df,
> > vds=Host[hosted_engine_2,fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df]), log id:
> > 3cf70a78
> > 2015-11-09 19:12:40,387 INFO
> > [org.ovirt.engine.core.vdsbroker.vdsbroker.GetHardwareInfoVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [a4459ff] FINISH,
> > GetHardwareInfoVDSCommand, log id: 3cf70a78
> > 2015-11-09 19:12:40,407 INFO
> > [org.ovirt.engine.core.bll.SetNonOperationalVdsCommand]
> > (DefaultQuartzScheduler_Worker-12) [3031cc4e] Running command:
> > SetNonOperationalVdsCommand internal: true. Entities affected :  ID:
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df Type: VDS
> > 2015-11-09 19:12:40,408 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [3031cc4e] START,
> > SetVdsStatusVDSCommand(HostName = hosted_engine_2, HostId =
> > fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df, status=NonOperational,
> > nonOperationalReason=NETWORK_UNREACHABLE, stopSpmFailureLogged=false),
> > log id: 17fa8ac0
> > 2015-11-09 19:12:40,411 INFO
> > [org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]
> > (DefaultQuartzScheduler_Worker-12) [3031cc4e] FINISH,
> > SetVdsStatusVDSCommand, log id: 17fa8ac0
> > 2015-11-09 19:12:40,413 ERROR
> > [org.ovirt.engine.core.bll.SetNonOperationalVdsCommand]
> > (DefaultQuartzScheduler_Worker-12) [3031cc4e] Host hosted_engine_2 is
> > set to Non-Operational, it is missing the following networks: ovirtmgmt
> > 2015-11-09 19:12:40,418 INFO
> > [org.ovirt.engine.core.bll.HandleVdsCpuFlagsOrClusterChangedCommand]
> > (DefaultQuartzScheduler_Worker-12) [5e83f7aa] Running command:
> > HandleVdsCpuFlagsOrClusterChangedCommand internal: true. Entities
> > affected :  ID: fab55ebe-cc0f-4f95-87aa-fc3a5e08a5df Type: VDS
> > 2015-11-09 19:12:40,439 INFO
> > [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
> > (DefaultQuartzScheduler_Worker-12) [5e83f7aa] Correlation ID: null, Call
> > Stack: null, Custom Event ID: -1, Message: Status of host
> > hosted_engine_2 was set to NonOperational.
> > 2015-11-09 19:12:40,443 ERROR
> > [org.ovirt.engine.core.vdsbroker.VdsUpdateRunTimeInfo]
> > (DefaultQuartzScheduler_Worker-12) [5e83f7aa]
> > ResourceManager::refreshVdsRunTimeInfo: Error:
> > DataIntegrityViolationException: CallableStatementCallback; SQL [{call
> > updatevdsdynamic(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
> > ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
> > ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)}]; ERROR: value too long for type
> > character varying(255)
> 
> That's ugly too, not sure why it happened and how reproducible, but
> I think you should first take care of the ovirtmgmt network.
> 
> Adding Eli anyway.
> 
> >   Where: SQL statement "UPDATE vds_dynamic
> >       SET cpu_cores = v_cpu_cores,cpu_threads = v_cpu_threads,
> >       cpu_model = v_cpu_model,cpu_speed_mh = v_cpu_speed_mh,
> >       if_total_speed = v_if_total_speed,kvm_enabled = v_kvm_enabled,
> >       mem_commited = v_mem_commited,physical_mem_mb = v_physical_mem_mb,
> >       status = v_status,vm_active = v_vm_active,vm_count = v_vm_count,
> >       vm_migrating = v_vm_migrating,reserved_mem = v_reserved_mem,
> >       guest_overhead = v_guest_overhead,rpm_version = v_rpm_version,
> > software_version = v_software_version,
> >       version_name = v_version_name,build_name =
> > v_build_name,previous_status = v_previous_status,
> >       cpu_flags = v_cpu_flags,
> >       vms_cores_count = v_vms_cores_count,pending_vcpus_count =
> > v_pending_vcpus_count,
> >       pending_vmem_size = v_pending_vmem_size,
> >       cpu_sockets = v_cpu_sockets,net_config_dirty = v_net_config_dirty,
> >       supported_cluster_levels = v_supported_cluster_levels,
> >       supported_engines = v_supported_engines,host_os = v_host_os,
> >       kvm_version = v_kvm_version,libvirt_version =
> > v_libvirt_version,spice_version = v_spice_version,
> >       gluster_version = v_gluster_version,
> >       kernel_version = v_kernel_version,iscsi_initiator_name =
> > v_iscsi_initiator_name,
> >       transparent_hugepages_state = v_transparent_hugepages_state,
> >       hooks = v_hooks,
> >       _update_date = LOCALTIMESTAMP,non_operational_reason =
> > v_non_operational_reason,
> >       hw_manufacturer = v_hw_manufacturer, hw_product_name =
> > v_hw_product_name,
> >       hw_version = v_hw_version, hw_serial_number = v_hw_serial_number,
> >       hw_uuid = v_hw_uuid, hw_family = v_hw_family, hbas = v_hbas,
> > supported_emulated_machines = v_supported_emulated_machines,
> >       kdump_status = v_kdump_status, selinux_enforce_mode =
> > v_selinux_enforce_mode,
> >       auto_numa_balancing = v_auto_numa_balancing,
> >       is_numa_supported = v_is_numa_supported,
> >       supported_rng_sources = v_supported_rng_sources,
> >       is_live_snapshot_supported = v_is_live_snapshot_supported,
> >       is_live_merge_supported = v_is_live_merge_supported,
> >       online_cpus = v_online_cpus
> >       WHERE vds_id = v_vds_id"
> >
> >
> > The SQL error then seems to repeat several more times.
> >
> > -- John Florian
> 
> Thanks for the report.
> 
> Best,
> --
> Didi
> 
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