Ultra-M UCS 240M4 Single HDD Failure - Hot Swap Procedure - vEPC

Introduction

This document describes the steps required to replace the faulty Hard Disk Drive (HDD) drive in the server in an Ultra-M setup that hosts StarOS Virtual Network Functions (VNFs).

Background Information

Ultra-M is a pre-packaged and validated virtualized mobile packet core solution designed to simplify the deployment of VNFs. OpenStack is the Virtualized Infrastructure Manager (VIM) for Ultra-M and consists of these node types:

• Compute
• Object Storage Disk - Compute (OSD - Compute)
• Controller
• OpenStack Platform - Director (OSPD)

The high-level architecture of Ultra-M and the components involved are depicted in this image:

UltraM ArchitectureThis document is intended for the Cisco personnel who are familiar with Cisco Ultra-M platform and it details the steps required to be carried out at OpenStack level at the time of the OSPD Server replacement.

Note: Ultra M 5.1.x release is considered in order to define the procedures in this document.

Abbreviations

Workflow of the MoP

Single HDD Failure

1. Each Baremetal server will be provisioned with two HDD drives to act as BOOT DISK in Raid 1 configuration. In case of single HDD failure, since there is RAID 1 level redundancy, the faulty HDD drive can be hot swapped.

2. Procedure to replace a faulty component on UCS C240 M4 server can be referred from: Replacing the Server Components.

3. In case of single HDD failure, only the faulty HDD will be hot swapped and hence no BIOS upgrade procedure is required after replacing new disks.

4. After replacing the disks, wait for the data sync between the disks. It might take hours to complete.

5. In an OpenStack based (Ultra-M) solution, UCS 240M4 baremetal server can take up one of these roles: Compute, OSD-Compute, Controller and OSPD. The steps required in order to handle the single HDD failure in each of these server roles is the same and this section describes the health checks to be performed before the hot swap of the disk.

Single HDD Failure on Compute Server

1. If the failure of  HDD drives is observed in UCS 240M4 which acts as a Compute node, perform these health checks before you finally perform the hot swap of the faulty disk

2. Identify the VMs running on this server and verify the status of the functions are good.

Identify the VMs Hosted in the Compute Node:

Identify the VMs that are hosted on the Compute server and verify that they are active and running. There can be two possibilities:

1. The Compute server contains only SF VM.

[stack@director ~]$ nova list --field name,host | grep compute-10
| 49ac5f22-469e-4b84-badc-031083db0533 |  VNF2-DEPLOYM_s8_0_8bc6cc60-15d6-4ead-8b6a-10e75d0e134d     |  
pod1-compute-10.localdomain    | ACTIVE|

2. The Compute server contains CF/ESC/EM/UAS combination of VMs.

[stack@director ~]$ nova list --field name,host | grep compute-8
| 507d67c2-1d00-4321-b9d1-da879af524f8 | VNF2-DEPLOYM_XXXX_0_c8d98f0f-d874-45d0-af75-88a2d6fa82ea   | pod1-compute-8.localdomain     | ACTIVE |
| f9c0763a-4a4f-4bbd-af51-bc7545774be2 | VNF2-DEPLOYM_c2_0_df4be88d-b4bf-4456-945a-3812653ee229     | pod1-compute-8.localdomain     | ACTIVE | 
| 75528898-ef4b-4d68-b05d-882014708694 | VNF2-ESC-ESC-0                                             | pod1-compute-8.localdomain     | ACTIVE |
| f5bd7b9c-476a-4679-83e5-303f0aae9309 | VNF2-UAS-uas-0                                             | pod1-compute-8.localdomain     | ACTIVE |

Note: In the output shown here, the first column corresponds to the UUID, the second column is the VM name and the third column is the hostname where the VM is present.

Health Checks:

1. Log in to the StarOS VNF and identify the card that corresponds to the SF or CF VM. Use the UUID of the SF or CF VM identified from the section "Identify the VMs hosted in the Compute Node", and identify the card that corresponds to the UUID.

[local]VNF2# show card hardware
Tuesday might 08 16:49:42 UTC 2018
<snip>
Card 8:
  Card Type               : 4-Port Service Function Virtual Card
  CPU Packages            : 26 [#0, #1, #2, #3, #4, #5, #6, #7, #8, #9, #10, #11, #12, #13, #14, #15, #16, #17, #18, #19, #20, #21, #22, #23, #24, #25]
  CPU Nodes               : 2
  CPU Cores/Threads       : 26
  Memory                  : 98304M (qvpc-di-large)
  UUID/Serial Number      :  49AC5F22-469E-4B84-BADC-031083DB0533
<snip> 

[local]VNF2# show card hardware
Tuesday might 08 16:49:42 UTC 2018
<snip>
Card 2:
  Card Type               : Control Function Virtual Card
  CPU Packages            : 8 [#0, #1, #2, #3, #4, #5, #6, #7]
  CPU Nodes               : 1
  CPU Cores/Threads       : 8
  Memory                  : 16384M (qvpc-di-large)
  UUID/Serial Number      : F9C0763A-4A4F-4BBD-AF51-BC7545774BE2
<snip>

2. Verify the status of the card.

[local]VNF2# show card table
Tuesday might 08 16:52:53 UTC 2018
Slot         Card Type                               Oper State     SPOF  Attach
-----------  --------------------------------------  -------------  ----  ------
 1: CFC      Control Function Virtual Card           Active         No         
2: CFC      Control Function Virtual Card           Standby        -          
 3: FC       4-Port Service Function Virtual Card    Active         No         
 4: FC       4-Port Service Function Virtual Card    Active         No         
 5: FC       4-Port Service Function Virtual Card    Active         No         
 6: FC       4-Port Service Function Virtual Card    Active         No         
 7: FC       4-Port Service Function Virtual Card    Active         No         
8: FC       4-Port Service Function Virtual Card    Active         No         
 9: FC       4-Port Service Function Virtual Card    Active         No         
10: FC       4-Port Service Function Virtual Card    Standby        -  

3. Log in to the ESC hosted in the Compute node and check the status.

[admin@VNF2-esc-esc-0 esc-cli]$ escadm status
0 ESC status=0 ESC Master Healthy

4. Log in to the EM hosted in the Compute node and check the status.

ubuntu@vnfd2deploymentem-1:~$ ncs_cli -u admin -C

admin connected from 10.225.247.142 using ssh on vnfd2deploymentem-1

admin@scm# show ems
EM            VNFM   
ID  SLA  SCM  PROXY  
---------------------
3   up   up   up     
6   up   up   up 

5. Log in to the UAS hosted in the Compute node and check the status.

ubuntu@autovnf2-uas-1:~$ sudo su
root@autovnf2-uas-1:/home/ubuntu# confd_cli -u admin -C
Welcome to the ConfD CLI
admin connected from 127.0.0.1 using console on autovnf2-uas-1
autovnf2-uas-1#show uas ha
uas ha-vip 172.18.181.101
autovnf2-uas-1#
autovnf2-uas-1#
autovnf2-uas-1#show uas
uas version 1.0.1-1
uas state ha-active
uas ha-vip 172.18.181.101
INSTANCE IP   STATE  ROLE          
-----------------------------------
172.18.180.4  alive  CONFD-SLAVE            
172.18.180.5  alive  CONFD-MASTER  
172.18.180.8  alive  NA            

autovnf2-uas-1#show errors 
% No entries found.

6. If health checks are fine, proceed with faulty disk hot swap procedure and wait for the data sync as it takes hours to complete. Refer to Replacing the Server Components.

7. Repeat these health check procedures in order to confirm that the health status of the VMs hosted on compute node are restored.

Single HDD Failure on Controller Server

1. If the failure of HDD drives are observed in UCS 240M4 which acts as a Controller node, follow the health checks before you perform hot swap of the faulty disk.

2. Check the Pacemaker status on controllers.

3. Log in to one of the active controllers and check the pacemaker status. All services must be running on the available controllers and stopped on the failed controller.

[heat-admin@pod1-controller-0 ~]$ sudo pcs status
Cluster name: tripleo_cluster
Stack: corosync
Current DC: pod1-controller-0 (version 1.1.15-11.el7_3.4-e174ec8) - partition with quorum
Last updated: Thu Jun 28 07:53:06 2018          Last change: Wed Jan 17 11:38:00 2018 by root via cibadmin on pod1-controller-0

3 nodes and 22 resources conimaged

Online: [ pod1-controller-0 pod1-controller-1 pod1-controller-2 ]

Full list of resources:

 ip-10.2.2.2      (ocf::heartbeat:IPaddr2):       Started pod1-controller-0
 ip-11.120.0.42 (ocf::heartbeat:IPaddr2):       Started pod1-controller-1
 ip-11.119.0.42 (ocf::heartbeat:IPaddr2):       Started pod1-controller-2
 ip-11.120.0.50 (ocf::heartbeat:IPaddr2):       Started pod1-controller-0
 ip-11.118.0.48 (ocf::heartbeat:IPaddr2):       Started pod1-controller-1
 ip-192.200.0.102       (ocf::heartbeat:IPaddr2):       Started pod1-controller-2
 Clone Set: haproxy-clone [haproxy]
     Started: [ pod1-controller-0 pod1-controller-1 pod1-controller-2 ]
 Master/Slave Set: galera-master [galera]
     Masters: [ pod1-controller-0 pod1-controller-1 pod1-controller-2 ]
 Clone Set: rabbitmq-clone [rabbitmq]
     Started: [ pod1-controller-0 pod1-controller-1 pod1-controller-2 ]
 Master/Slave Set: redis-master [redis]
     Masters: [ pod1-controller-0 ]
     Slaves: [ pod1-controller-1 pod1-controller-2 ]
 openstack-cinder-volume        (systemd:openstack-cinder-volume):      Started pod1-controller-0
 my-ipmilan-for-controller-0    (stonith:fence_ipmilan):        Started pod1-controller-1
 my-ipmilan-for-controller-1    (stonith:fence_ipmilan):        Started pod1-controller-2
 my-ipmilan-for-controller-2    (stonith:fence_ipmilan):        Started pod1-controller-0

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled

4. Check MariaDB status in the active controllers.

[stack@director] nova list | grep control
| 4361358a-922f-49b5-89d4-247a50722f6d | pod1-controller-0 | ACTIVE | - | Running | ctlplane=192.200.0.102 |
| d0f57f27-93a8-414f-b4d8-957de0d785fc | pod1-controller-1 | ACTIVE | - | Running | ctlplane=192.200.0.110 |

[stack@director ~]$ for i in 192.200.0.102 192.200.0.110 ; do echo "*** $i ***" ; ssh heat-admin@$i "sudo mysql --exec=\"SHOW STATUS LIKE 'wsrep_local_state_comment'\" ; sudo mysql --exec=\"SHOW STATUS LIKE 'wsrep_cluster_size'\""; done
*** 192.200.0.152 ***
Variable_name     Value
wsrep_local_state_comment  Synced
Variable_name     Value
wsrep_cluster_size         2
*** 192.200.0.154 ***
Variable_name     Value
wsrep_local_state_comment  Synced
Variable_name     Value
wsrep_cluster_size         2

5. Verify that these lines are present for each active controller:

wsrep_local_state_comment: Synced

wsrep_cluster_size: 2

6. Check Rabbitmq status in the active controllers.

[heat-admin@pod1-controller-0 ~]$ sudo rabbitmqctl cluster_status
Cluster status of node 'rabbit@pod1-controller-0' ...
[{nodes,[{disc,['rabbit@pod1-controller-0','rabbit@pod1-controller-1',
                'rabbit@pod1-controller-2']}]},
 {running_nodes,['rabbit@pod1-controller-2',
                 'rabbit@pod1-controller-1',
                 'rabbit@pod1-controller-0']},
 {cluster_name,<<"rabbit@pod1-controller-0.localdomain">>},
 {partitions,[]},
 {alarms,[{'rabbit@pod1-controller-2',[]},
          {'rabbit@pod1-controller-1',[]},
          {'rabbit@pod1-controller-0',[]}]}]

7. If health checks are fine, proceed with faulty disk hot swap procedure and wait for the data sync as it takes hours to complete. Refer to Replacing the Server Components.

8. Repeat these health check procedures in order to confirm the health status of the controller is restored.

Single HDD Failure on OSD-Compute Server

If the failure of  HDD drives are observed in UCS 240M4 which acts as sn OSD-Compute node, perform these health checks before you perform hot swap of the faulty disk.

Identify the VMs Hosted in the OSD-Compute Node:

Identify the VMs that are hosted on the Compute server. There can be two possibilities:

1. The OSD-Compute server contains EM/UAS/Auto-Deploy/Auto-IT combination of VMs.

[stack@director ~]$ nova list --field name,host | grep osd-compute-0
| c6144778-9afd-4946-8453-78c817368f18 | AUTO-DEPLOY-VNF2-uas-0                                   | pod1-osd-compute-0.localdomain | ACTIVE |
| 2d051522-bce2-4809-8d63-0c0e17f251dc | AUTO-IT-VNF2-uas-0                                       | pod1-osd-compute-0.localdomain | ACTIVE |
| 507d67c2-1d00-4321-b9d1-da879af524f8 | VNF2-DEPLOYM_XXXX_0_c8d98f0f-d874-45d0-af75-88a2d6fa82ea | pod1-osd-compute-0.localdomain | ACTIVE |
| f5bd7b9c-476a-4679-83e5-303f0aae9309 | VNF2-UAS-uas-0                                           | pod1-osd-compute-0.localdomain | ACTIVE |

2. The Compute server contains CF/ESC/EM/UAS combination of VMs.

[stack@director ~]$ nova list --field name,host | grep osd-compute-1
| 507d67c2-1d00-4321-b9d1-da879af524f8 | VNF2-DEPLOYM_XXXX_0_c8d98f0f-d874-45d0-af75-88a2d6fa82ea   | pod1-compute-8.localdomain     | ACTIVE |
| f9c0763a-4a4f-4bbd-af51-bc7545774be2 | VNF2-DEPLOYM_c1_0_df4be88d-b4bf-4456-945a-3812653ee229     | pod1-compute-8.localdomain     | ACTIVE |
| 75528898-ef4b-4d68-b05d-882014708694 | VNF2-ESC-ESC-0                                             | pod1-compute-8.localdomain     | ACTIVE |
| f5bd7b9c-476a-4679-83e5-303f0aae9309 | VNF2-UAS-uas-0                                             | pod1-compute-8.localdomain     | ACTIVE |

Note: In the output shown here, the first column corresponds to the UUID, the second column is the VM name and the third column is the hostname where the VM is present. 

3. Ceph processes are active on the OSD-Compute server.

[root@pod1-osd-compute-1 ~]# systemctl list-units *ceph*

UNIT                              LOAD   ACTIVE SUB     DESCRIPTION

var-lib-ceph-osd-ceph\x2d11.mount loaded active mounted /var/lib/ceph/osd/ceph-11

var-lib-ceph-osd-ceph\x2d2.mount  loaded active mounted /var/lib/ceph/osd/ceph-2

var-lib-ceph-osd-ceph\x2d5.mount  loaded active mounted /var/lib/ceph/osd/ceph-5

var-lib-ceph-osd-ceph\x2d8.mount  loaded active mounted /var/lib/ceph/osd/ceph-8

ceph-osd@11.service               loaded active running Ceph object storage daemon

ceph-osd@2.service                loaded active running Ceph object storage daemon

ceph-osd@5.service                loaded active running Ceph object storage daemon

ceph-osd@8.service                loaded active running Ceph object storage daemon

system-ceph\x2ddisk.slice         loaded active active  system-ceph\x2ddisk.slice

system-ceph\x2dosd.slice          loaded active active  system-ceph\x2dosd.slice

ceph-mon.target                   loaded active active  ceph target allowing to start/stop all ceph-mon@.service instances at once

ceph-osd.target                   loaded active active  ceph target allowing to start/stop all ceph-osd@.service instances at once

ceph-radosgw.target               loaded active active  ceph target allowing to start/stop all ceph-radosgw@.service instances at once

ceph.target                       loaded active active  ceph target allowing to start/stop all ceph*@.service instances at once            

4. Verify that the mapping of OSD (HDD disk) to Journal (SSD) is good.

[heat-admin@pod1-osd-compute-3 ~]$ sudo ceph-disk list
/dev/sda :
 /dev/sda1 other, iso9660
 /dev/sda2 other, xfs, mounted on /
/dev/sdb :
 /dev/sdb1 ceph journal, for /dev/sdc1
 /dev/sdb3 ceph journal, for /dev/sdd1
 /dev/sdb2 ceph journal, for /dev/sde1
 /dev/sdb4 ceph journal, for /dev/sdf1
/dev/sdc :
 /dev/sdc1 ceph data, active, cluster ceph, osd.1, journal /dev/sdb1
/dev/sdd :
 /dev/sdd1 ceph data, active, cluster ceph, osd.7, journal /dev/sdb3
/dev/sde :
 /dev/sde1 ceph data, active, cluster ceph, osd.4, journal /dev/sdb2
/dev/sdf :
 /dev/sdf1 ceph data, active, cluster ceph, osd.10, journal /dev/sdb4

5. Verify that the Ceph health and the OSD tree mapping is good.

[heat-admin@pod1-osd-compute-3 ~]$ sudo ceph -s
    cluster eb2bb192-b1c9-11e6-9205-525400330666
     health HEALTH_OK
            1 mons down, quorum 0,1 pod1-controller-0,pod1-controller-1
     monmap e1: 3 mons at {pod1-controller-0=11.118.0.10:6789/0,pod1-controller-1=11.118.0.11:6789/0,pod1-controller-2=11.118.0.12:6789/0}
            election epoch 28, quorum 0,1 pod1-controller-0,pod1-controller-1
     osdmap e709: 12 osds: 12 up, 12 in
            flags sortbitwise,require_jewel_osds
      pgmap v941813: 704 pgs, 6 pools, 490 GB data, 163 kobjects
            1470 GB used, 11922 GB / 13393 GB avail
                 704 active+clean
  client io 58580 B/s wr, 0 op/s rd, 7 op/s wr

[heat-admin@pod1-osd-compute-3 ~]$ sudo ceph osd tree
ID WEIGHT   TYPE NAME                   UP/DOWN REWEIGHT PRIMARY-AFFINITY 
-1 13.07996 root default                                                  
-2  4.35999     host pod1-osd-compute-0                                   
 0  1.09000         osd.0                    up  1.00000          1.00000 
 3  1.09000         osd.3                    up  1.00000          1.00000 
 6  1.09000         osd.6                    up  1.00000          1.00000 
 9  1.09000         osd.9                    up  1.00000          1.00000                                  
-4  4.35999     host pod1-osd-compute-2                                   
 2  1.09000         osd.2                    up  1.00000          1.00000 
 5  1.09000         osd.5                    up  1.00000          1.00000 
 8  1.09000         osd.8                    up  1.00000          1.00000 
11  1.09000         osd.11                   up  1.00000          1.00000 
-5  4.35999     host pod1-osd-compute-3                                   
 1  1.09000         osd.1                    up  1.00000          1.00000 
 4  1.09000         osd.4                    up  1.00000          1.00000 
 7  1.09000         osd.7                    up  1.00000          1.00000 
10  1.09000         osd.10                   up  1.00000          1.00000 

6. If health checks are fine, proceed with faulty disk hot swap procedure and wait for the data sync as it takes hours to complete. Refer to Replacing the Server Components.

7. Repeat these health check procedures in order to confirm the health status of the VMs hosted on OSD-Compute node are restored.

Single HDD Failure on OSPD Server

1. If the failure of  HDD drives are observed in UCS 240M4 which acts as an OSPD node, perform these health checks before you initiate the hot swap of the faulty disk.

2. Check the status of OpenStack stack and the node list.

[stack@director ~]$ source stackrc 
[stack@director ~]$ openstack stack list --nested
[stack@director ~]$ ironic node-list
[stack@director ~]$ nova list

3. Check if all the Undercloud services are in loaded, active and running status from the OSP-D node. 

[stack@director ~]$ systemctl list-units "openstack*" "neutron*" "openvswitch*"

UNIT                                       LOAD   ACTIVE SUB     DESCRIPTION

neutron-dhcp-agent.service                 loaded active running OpenStack Neutron DHCP Agent
neutron-openvswitch-agent.service          loaded active running OpenStack Neutron Open vSwitch Agent
neutron-ovs-cleanup.service                loaded active exited  OpenStack Neutron Open vSwitch Cleanup Utility
neutron-server.service                     loaded active running OpenStack Neutron Server
openstack-aodh-evaluator.service           loaded active running OpenStack Alarm evaluator service
openstack-aodh-listener.service            loaded active running OpenStack Alarm listener service
openstack-aodh-notifier.service            loaded active running OpenStack Alarm notifier service
openstack-ceilometer-central.service       loaded active running OpenStack ceilometer central agent
openstack-ceilometer-collector.service     loaded active running OpenStack ceilometer collection service
openstack-ceilometer-notification.service  loaded active running OpenStack ceilometer notification agent
openstack-glance-api.service               loaded active running OpenStack Image Service (code-named Glance) API server
openstack-glance-registry.service          loaded active running OpenStack Image Service (code-named Glance) Registry server
openstack-heat-api-cfn.service             loaded active running Openstack Heat CFN-compatible API Service
openstack-heat-api.service                 loaded active running OpenStack Heat API Service
openstack-heat-engine.service              loaded active running Openstack Heat Engine Service
openstack-ironic-api.service               loaded active running OpenStack Ironic API service
openstack-ironic-conductor.service         loaded active running OpenStack Ironic Conductor service
openstack-ironic-inspector-dnsmasq.service loaded active running PXE boot dnsmasq service for Ironic Inspector
openstack-ironic-inspector.service         loaded active running Hardware introspection service for OpenStack Ironic
openstack-mistral-api.service              loaded active running Mistral API Server
openstack-mistral-engine.service           loaded active running Mistral Engine Server
openstack-mistral-executor.service         loaded active running Mistral Executor Server
openstack-nova-api.service                 loaded active running OpenStack Nova API Server
openstack-nova-cert.service                loaded active running OpenStack Nova Cert Server
openstack-nova-compute.service             loaded active running OpenStack Nova Compute Server
openstack-nova-conductor.service           loaded active running OpenStack Nova Conductor Server
openstack-nova-scheduler.service           loaded active running OpenStack Nova Scheduler Server
openstack-swift-account-reaper.service     loaded active running OpenStack Object Storage (swift) - Account Reaper
openstack-swift-account.service            loaded active running OpenStack Object Storage (swift) - Account Server
openstack-swift-container-updater.service  loaded active running OpenStack Object Storage (swift) - Container Updater
openstack-swift-container.service          loaded active running OpenStack Object Storage (swift) - Container Server
openstack-swift-object-updater.service     loaded active running OpenStack Object Storage (swift) - Object Updater
openstack-swift-object.service             loaded active running OpenStack Object Storage (swift) - Object Server
openstack-swift-proxy.service              loaded active running OpenStack Object Storage (swift) - Proxy Server
openstack-zaqar.service                    loaded active running OpenStack Message Queuing Service (code-named Zaqar) Server
openstack-zaqar@1.service                  loaded active running OpenStack Message Queuing Service (code-named Zaqar) Server Instance 1
openvswitch.service                        loaded active exited  Open vSwitch

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

37 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

4. If health checks are fine, proceed with faulty disk hot swap procedure and wait for the data sync as it takes hours to complete. Refer to Replacing the Server Components.

5. Repeat these health check procedures in order to confirm that the health status of the OSPD nodes are restored.