Overview
The servers run linux and gets security patches continously, but if reboot is needed, we reboot during the normal patching of linux servers.
Schedule
The schedule is announced on https://varsel.it.ntnu.no/ and is every fourth wednesday in each month or third if it's december.
Reboot order
The openstack are rebooted as follows
Patch day before 16:00
- Storage nodes. Rebooted one by one and does not cause any interference with the openstack availability. Two nodes can be down and we still have the Ceph storage available, and since Ceph is verified up and running 100% before next node is rebooted it's safe.
Patch day after 16:00
- Compute nodes. This will cause the instances running on that node to be shut down before the compute node reboots and they will be started when the node is down. The instance will be unavailable ~10 to 15 minutes when this is happening.
- Infrastructure nodes. There are three infrastructure nodes with all the services running on each behind a load balancer. There might be small delay in network access to the instance when the loadbalancer changes it's target or the active loadbalancer is taken down.
Patching should be finnished before 23:00, but experience shows that it's finished at around 20:00.
Patching procedures
Storage nodes
Log in to a ceph monitor (cephmon0, 1 or 2) and run the command "watch -n 1 ceph -s". Verify the following :
# health: should be ok health: HEALTH_OK # mon: should be 3 daemons and have quorum # osd: all should be up, as of this example 50 of 50 are up. services: mon: 3 daemons, quorum cephmon0,cephmon1,cephmon2 mgr: cephmon0(active), standbys: cephmon1, cephmon2 osd: 50 osds: 50 up, 50 in rgw: 1 daemon active data: pools: 10 pools, 880 pgs objects: 1.39M objects, 5.59TiB usage: 16.8TiB used, 74.2TiB / 91.0TiB avail pgs: 878 active+clean 2 active+clean+scrubbing+deep io: client: 8.16KiB/s rd, 2.01MiB/s wr, 105op/s rd, 189op/s wr
When everything is ok, reboot first node and await for ceph to be ok again before doing the next.
Compute nodes
Verify the instances running on the compute node
openstack server list --all --host compute01 +--------------------------------------+--------------------+--------+-----------------------------------------+---------------------------------------------+-----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+--------------------+--------+-----------------------------------------+---------------------------------------------+-----------+ | 5c32f1d1-2f12-1234-beffe112345ceffe1 | kubertest-master-2 | ACTIVE | kubertest=10.2.0.7, 129.241.152.9 | CoreOS 20190501 | m1.xlarge | +--------------------------------------+--------------------+--------+-----------------------------------------+---------------------------------------------+-----------+
- Check if one or more of the instances have ok network. (ping). Some instances might have security groups making checking them impossible.
- Check if there are no more than 1 kube master on a compute node. They require quorum, so moving a master is needed if there are two instances of the same master on one compute node
Reboot the compute node when all is ok and verify that the compute node comes up, the instances are all active and the instances tested with ping still have network.
Continue to reboot one and one node checking each compute node as described above.
Infra nodes
Complete shutdown/power up procedures.
Overview
Sometimes it's needed to shut down the whole stack, and then it's important to do it in the right order to ensure quorum is maintaned.
Turn off monitoring
Monitoring will cause a lot of alarms during shutdown, so it can be smart to turn off the sensu.
for a in $(seq 0 2); do ssh sensu$a halt; done
Compute nodes
Power off all the compute nodes first.
Infra nodes
Step 1 : Turn off autostart of vm's
Ensure that all vm's do not autostart on each infra node (infra0, 1 and 2)
# List all vm's with autostart, should be none. virsh list --all --name --autostart # If any instances are set with autostart, disable it. virsh autostart <vm> --disable
Step 2 : Turn of vm's/services
1 -Turn off radosgw
for a in $(seq 0 2); do ssh radosgw$a "halt" ; done
2 - Mass turn off other vm's. Ignore warning about apimon0 and apimon2 is non existing.
# Friendly one liner for a in adminlb apimon cache cinder glance heatapi heatengine horizon keystone munin neutronapi novaapi novaservices puppetdb servicelb; do for b in $(seq 0 2); do ssh $a$b "halt" ; done ; done # Broken down for readability for a in adminlb apimon cache cinder glance heatapi heatengine horizon keystone munin neutronapi novaapi novaservices puppetdb redis servicelb; do for b in $(seq 0 2);do ssh $a$b "halt" done done
3 - Storage noder
Verify on a cephmon 0 i/o
Shut down storage01 to 05.
for a in $(seq 1 5); do ssh storage0$a halt ; done
4 - postgres
Find the master. Use ip addr show and note the one with two interfaces
# Oneliner to find which are the master for a in $(seq 0 2); do [ $(ssh postgres$a ip addr show | grep -c inet) -eq 5 ] && echo postgres$a is master; done
Note which are the master
Shut down the non masters
Shut down the master
5 - mysql
Shut down one by one.
# for a in $(seq 0 2); do ssh mysql$a halt; sleep 60 ; done # On each mysql node systemctl status mysql systemctl stop mysql systemctl status mysql halt
6 - Kanin
# for a in $(seq 0 2); do ssh kanin$a halt; sleep 15; done # On each kanin node systemctl status rabbitmq-server systemctl stop rabbitmq-server systemctl status rabbitmq-server halt
7 - Redis
Check which redis is master on http://adminapi.stack.it.ntnu.no:9000/
( the one with green line)
Turn of the others first.
Redis-cli command to find which role a redis server has:
# On each redis server redis-cli -a "<password>" info replication | grep role # Masters will print "role:master" and slaves will print "role:slave"
Note which is last down and power it first on
check : http://adminapi.stack.it.ntnu.no:9000/ # On non masters systemctl status redis systemctl stop redis systemctl status redis halt
7 - Shut down cephmon
for a in $(seq 0 2); do ssh cephmon$a halt; done
8 - Turn off infra nodes
Power on
1 - Power on the infra nodes.
2 - mysql
Lag virsh kommando. Husk siste først.
ssh <sist ned mysql>
Det som er ett triks som virker er å endre my.cnf på den noden du stoppet sist og fjerne adressen til andre noder i clusteret. Da starter den alene, også kan du start de andre som kobler seg til den første.
/etc/mysql/my.conf
wsrep_cluster_address = gcomm://10.212.0.53,10.212.0.60,10.212.0.61
→
wsrep_cluster_address = gcomm://
systemcl restart mysqld
boot de to andre
De skal bli en del av cluster
på hvilken som helst
mysql
show status;
| wsrep_cluster_size | 3
Skal være 3.
Når 3 : første mysql server, sett tilbake wsrep og restart mysql.
3 - postgres
Skru på master.
systemctl status postgres - Ok - Ev finne ut hvordan postgres kjører.
Skru på de andre
4 -
Kanin, skru på den som ble sist avslått. Vent, (her vil det være kun 1 node)
rabbitmqctl cluster_status
Cluster status of node rabbit@kanin0 ...
[{nodes,[{disc,[rabbit@kanin0,rabbit@kanin1,rabbit@kanin2]}]},
{running_nodes,[rabbit@kanin2,rabbit@kanin1,rabbit@kanin0]},
{cluster_name,<<"rabbit@kanin2.iaas.ntnu.no">>},
{partitions,[]},
{alarms,[{rabbit@kanin2,[]},{rabbit@kanin1,[]},{rabbit@kanin0,[]}]}]
Slå på de to andre
5 -cepmon
boot
ceph -s
6 - boot storage
vent til ceph -s health ok.
Lars Erik ødelegger nummereringa her:
skru på en adminlb, en servicelb og minst en puppetdb før røkla
7 røkla.
Bruk openstack kommando for å se at ting virker tm.
8 restart openstack nett på infra nodene dersom nett ikke ok.
bjarneskpc:~$ openstack network agent list --sort-column Host
+--------------------------------------+----------------------+-----------+-------------------+-------+-------+---------------------------+
| ID | Agent Type | Host | Availability Zone | Alive | State | Binary |
+--------------------------------------+----------------------+-----------+-------------------+-------+-------+---------------------------+
| 10b839c3-9fb8-4fef-aba0-0eeae23add42 | Open vSwitch agent | compute01 | None | :-) | UP | neutron-openvswitch-agent |
| 8263f2a2-9eba-46f2-9cdf-daeb05124918 | Open vSwitch agent | compute02 | None | :-) | UP | neutron-openvswitch-agent |
| ecd77d21-6839-4d5a-abaa-10e5dcd64afd | Open vSwitch agent | compute03 | None | :-) | UP | neutron-openvswitch-agent |
| e6461a14-f278-4ee1-9575-fd3cfc208604 | Open vSwitch agent | compute04 | None | :-) | UP | neutron-openvswitch-agent |
| 4e040257-af95-401d-b940-44968ba053ba | Open vSwitch agent | compute05 | None | :-) | UP | neutron-openvswitch-agent |
| a6083a53-06a5-4588-a52b-a5cebb94be5b | Open vSwitch agent | compute06 | None | :-) | UP | neutron-openvswitch-agent |
| 68356d55-8562-48e1-a4c7-38c432dd3fc8 | Open vSwitch agent | compute08 | None | :-) | UP | neutron-openvswitch-agent |
| 9e011ede-c3b1-4aed-b6ba-160f67be1f61 | Open vSwitch agent | compute09 | None | :-) | UP | neutron-openvswitch-agent |
| 92535f51-a764-48af-889b-381a8ca77222 | DHCP agent | infra00 | nova | :-) | UP | neutron-dhcp-agent |
| 9872f4a7-1066-4862-9cb8-51a5f3add6b5 | Loadbalancerv2 agent | infra00 | None | :-) | UP | neutron-lbaasv2-agent |
| a3aa759e-7fbc-43fa-b9eb-47d85a23981e | Metadata agent | infra00 | None | :-) | UP | neutron-metadata-agent |
| d597e148-12f5-4bdd-bd05-db5b936be393 | Open vSwitch agent | infra00 | None | :-) | UP | neutron-openvswitch-agent |
| d728e0c2-2f72-4e39-ab2b-431f33efd0c5 | L3 agent | infra00 | nova | :-) | UP | neutron-l3-agent |
| 4be71b64-c102-4e86-892d-76f0b3d43881 | Loadbalancerv2 agent | infra01 | None | :-) | UP | neutron-lbaasv2-agent |
| 6b07607e-bf5d-4317-9c58-300e7af2c2ea | Open vSwitch agent | infra01 | None | :-) | UP | neutron-openvswitch-agent |
| 849f7738-f5d4-4e31-a7bf-7f94fca29cc2 | L3 agent | infra01 | nova | :-) | UP | neutron-l3-agent |
| 998d3169-15fe-49f7-b31a-79f787851680 | Metadata agent | infra01 | None | :-) | UP | neutron-metadata-agent |
| f73bb906-986d-4e28-8fdf-982aae1a1790 | DHCP agent | infra01 | nova | :-) | UP | neutron-dhcp-agent |
| 25aea9b5-0f0b-47dc-8d7d-3dcef9d67d50 | Metadata agent | infra02 | None | :-) | UP | neutron-metadata-agent |
| 9f487c51-1599-4924-942b-a0f45905a84c | L3 agent | infra02 | nova | :-) | UP | neutron-l3-agent |
| b03b1721-6073-4869-b2c7-e98afeab4c47 | Open vSwitch agent | infra02 | None | :-) | UP | neutron-openvswitch-agent |
| cf42e771-dbb4-4439-88c7-2fb02ea5613d | Loadbalancerv2 agent | infra02 | None | :-) | UP | neutron-lbaasv2-agent |
| dcf7bf04-5634-4ad4-ba90-5c75254b80f5 | DHCP agent | infra02 | nova | :-) | UP | neutron-dhcp-agent |
+--------------------------------------+----------------------+-----------+-------------------+-------+-------+---------------------------+
Dersom restart, systemctl restart
systemctl restart neutron-dhcp-agent.service neutron-lbaasv2-agent.service neutron-openvswitch-agent.service neutron-l3-agent.service neutron-metadata-agent.service neutron-ovs-cleanup.service
10 - boot compute noder. Pass på motsatt rekkefølge (quorum på ting i openstacken).
11 openstack compute service list
UP is good
bjarneskpc:~$ openstack compute service list
+-----+------------------+---------------+----------+---------+-------+----------------------------+
| ID | Binary | Host | Zone | Status | State | Updated At |
+-----+------------------+---------------+----------+---------+-------+----------------------------+
| 30 | nova-compute | compute01 | nova | enabled | up | 2019-06-19T12:44:39.000000 |
| 33 | nova-compute | compute02 | nova | enabled | up | 2019-06-19T12:44:38.000000 |
| 36 | nova-compute | compute03 | nova | enabled | up | 2019-06-19T12:44:37.000000 |
| 212 | nova-compute | compute04 | nova | enabled | up | 2019-06-19T12:44:36.000000 |
| 215 | nova-compute | compute05 | nova | enabled | up | 2019-06-19T12:44:37.000000 |
| 224 | nova-compute | compute06 | nova | enabled | up | 2019-06-19T12:44:39.000000 |
| 233 | nova-conductor | novaservices0 | internal | enabled | up | 2019-06-19T12:44:31.000000 |
| 239 | nova-scheduler | novaservices0 | internal | enabled | up | 2019-06-19T12:44:40.000000 |
| 248 | nova-consoleauth | novaservices0 | internal | enabled | up | 2019-06-19T12:44:34.000000 |
| 255 | nova-consoleauth | novaservices1 | internal | enabled | up | 2019-06-19T12:44:32.000000 |
| 258 | nova-scheduler | novaservices1 | internal | enabled | up | 2019-06-19T12:44:40.000000 |
| 261 | nova-conductor | novaservices1 | internal | enabled | up | 2019-06-19T12:44:32.000000 |
| 264 | nova-scheduler | novaservices2 | internal | enabled | up | 2019-06-19T12:44:32.000000 |
| 267 | nova-consoleauth | novaservices2 | internal | enabled | up | 2019-06-19T12:44:37.000000 |
| 270 | nova-conductor | novaservices2 | internal | enabled | up | 2019-06-19T12:44:35.000000 |
| 275 | nova-compute | compute08 | nova | enabled | up | 2019-06-19T12:44:40.000000 |
| 281 | nova-compute | compute09 | nova | enabled | up | 2019-06-19T12:44:38.000000 |
+-----+------------------+---------------+----------+---------+-------+----------------------------+
12 - Kjør script for testing.
13 - Ring gjøvik.