How to operate containerized OpenStack
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OpenStack services can be containerized to provide a more lightweight and portable deployment option compared to virtual machines. The document discusses how OpenStack services like Nova, Neutron, Cinder etc. run as individual containers that share the host operating system and can be configured by modifying files in a shared directory. Logs and operations like start/stop/restart can also be managed from the host through the container IDs. Overall, containerization allows OpenStack deployments to benefit from advantages like agility, density and simplified operations.
![OpenStack nova service packages
14
[root@con1 ~]# docker ps | grep nova
b306dea9036e 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877
"kolla_start" 3 months ago Up 46 hours (healthy) nova_metadata
1188bebab31a 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877
"kolla_start" 3 months ago Up 46 hours (healthy) nova_api
caac257c843b 192.168.100.200:8787/rhosp13/openstack-nova-placement-api:13.0-75.1554788885
"kolla_start" 3 months ago Up 46 hours (healthy) nova_placement
4524d6c0dc8f 192.168.100.200:8787/rhosp13/openstack-nova-scheduler:13.0-76.1554788862
"kolla_start" 3 months ago Up 46 hours (healthy) nova_scheduler
41c245f38044 192.168.100.200:8787/rhosp13/openstack-nova-novncproxy:13.0-77.1554788872
"kolla_start" 3 months ago Up 46 hours (healthy) nova_vnc_proxy
de778fb6a443 192.168.100.200:8787/rhosp13/openstack-nova-consoleauth:13.0-74.1554788860
"kolla_start" 3 months ago Up 46 hours (healthy) nova_consoleauth
468fd945d50f 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877
"kolla_start" 3 months ago Up 46 hours nova_api_cron
15baa1302a05 192.168.100.200:8787/rhosp13/openstack-nova-conductor:13.0-74.1554788876
"kolla_start" 3 months ago Up 46 hours (healthy) nova_conductor
[root@con1 ~]#
Nova’s services container list](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-14-320.jpg)
![How to configure OpenStack
18
[root@con1 puppet-generated]# cd /var/lib/config-data/puppet-generated/nova
[root@con1 nova]# ll
total 0
drwxr-xr-x. 6 root root 62 Sep 29 01:56 etc
drwxr-xr-x. 4 root root 30 Aug 7 09:34 var
[root@con1 nova]#
[root@con1 nova]# ll etc
total 0
drwxr-xr-x. 5 root root 54 Aug 7 09:34 httpd
drwxr-xr-x. 2 root root 25 Sep 29 01:56 my.cnf.d
drwxr-xr-x. 2 root root 23 Aug 7 08:53 nova
drwxr-xr-x. 3 root root 20 Aug 1 18:17 systemd
[root@con1 nova]# ll etc/nova
total 372
-rw-r-----. 1 root 42436 379872 Sep 29 01:56 nova.conf
[root@con1 nova]#
Containerized OpenStack can configure
through specific directory
(/var/lib/config-data/puppet-generated)](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-18-320.jpg)
![How to configure OpenStack
19
[root@con1 nova]# cat etc/nova/nova.conf | grep -v ^# | grep -v ^$
[DEFAULT]
rootwrap_config=/etc/nova/rootwrap.conf
allow_resize_to_same_host=False
vif_plugging_is_fatal=True
vif_plugging_timeout=300
ram_allocation_ratio=1.0
instance_name_template=instance-%08x
my_ip=172.17.1.11
host=con1.example.com
dhcp_domain=
firewall_driver=nova.virt.firewall.NoopFirewallDriver
ssl_only=True
cert=/etc/pki/tls/certs/novnc_proxy.crt
key=/etc/pki/tls/private/novnc_proxy.key
state_path=/var/lib/nova
report_interval=10
...
If modify conf files in shared specific
directory, the container will be run after
loading conf files of specific directory when
container start.](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-19-320.jpg)
![How to see OpenStack logs
20
[root@con1 nova]# cd /var/log/containers/
[root@con1 containers]# ll
total 0
drwxr-xr-x. 2 42402 42402 120 Sep 29 02:27 aodh
drwxr-xr-x. 2 42405 42405 85 Sep 29 02:35 ceilometer
drwxr-xr-x. 2 42407 42407 106 Sep 29 02:35 cinder
drwxr-xr-x. 2 42415 42415 21 Sep 29 02:19 glance
drwxr-xr-x. 2 42416 42416 74 Sep 29 02:35 gnocchi
drwxr-xr-x. 2 root root 25 Sep 29 02:16 haproxy
drwxr-xr-x. 2 42418 42418 73 Sep 29 02:27 heat
drwxr-xr-x. 2 apache apache 25 Sep 29 02:03 horizon
drwxr-xr-x. 14 root root 219 Sep 29 01:49 httpd
drwxr-xr-x. 2 42425 42425 57 Sep 29 11:01 keystone
drwxr-xr-x. 2 42434 42434 24 Sep 29 02:07 mysql
drwxr-xr-x. 2 42435 42435 147 Sep 29 02:29 neutron
drwxr-xr-x. 2 42436 42436 215 Sep 29 02:28 nova
...
We can see services directory in the
specific directory(/var/log/containers)](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-20-320.jpg)
![How to see OpenStack logs
21
[root@con1 containers]# cd nova
[root@con1 nova]# ll
total 3592
-rw-r--r--. 1 42436 42436 1895944 Sep 29 14:09 nova-api.log
-rw-r--r--. 1 42436 42436 847896 Sep 29 14:09 nova-api-metadata.log
-rw-r--r--. 1 42436 42436 8533 Sep 29 11:01 nova-conductor.log
-rw-r--r--. 1 42436 42436 7258 Sep 29 11:01 nova-consoleauth.log
-rw-r--r--. 1 42436 42436 84409 Sep 29 02:22 nova-manage.log
-rw-r--r--. 1 42436 42436 700 Sep 29 02:27 nova-novncproxy.log
-rw-r--r--. 1 42436 42436 271975 Sep 29 14:08 nova-placement-api.log
-rw-r--r--. 1 42436 42436 25284 Sep 29 14:08 nova-scheduler.log
[root@con1 nova]# tail -f nova-api.log
2019-09-29 14:08:59.717 772 INFO nova.api.openstack.requestlog
[req-8d531562-4f33-420c-ae27-dacbb2ad8ee1 f960b35758884d10bc21028180e7d65c
0f4ed0809e3942c99306d70c134d0489 - default default] 172.17.1.11 "OPTIONS /" status: 200 len:
397 microversion: - time: 0.000886
2019-09-29 14:09:01.729 772 INFO nova.api.openstack.requestlog
[req-8d531562-4f33-420c-ae27-dacbb2ad8ee1 f960b35758884d10bc21028180e7d65c
0f4ed0809e3942c99306d70c134d0489 - default default] 172.17.1.11 "OPTIONS /" status: 200 len:
397 microversion: - time: 0.000568
We can see logs in the service
directory of specific directory.](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-21-320.jpg)
![Basic Operation Commands
23
[root@con1 ~]# docker stop nova_api
[root@con1 ~]# docker start nova_api
[root@con1 ~]# docker restart nova_api
[root@con1 ~]# docker restart nova_api nova_placement nova_scheduler
nova_vnc_proxy nova_consoleauth nova_api_corn nova_conductor nova_metadata
Basic Command for controlling and operating services](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-23-320.jpg)
![Network
24
[root@con1 ~]# docker ps | grep neutron
CONTAINER ID IMAGE COMMAND
CREATED STATUS PORTS NAMES
4871f1b2259c 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns
exec qdh..." 46 hours ago Up 46 hours
neutron-haproxy-qdhcp-b8c3caac-ea44-464a-a8ef-f6d698bd53b5
6cc5b74a1c10 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns
exec qdh..." 46 hours ago Up 46 hours
neutron-dnsmasq-qdhcp-b8c3caac-ea44-464a-a8ef-f6d698bd53b5
59581f77930b 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns
exec qdh..." 46 hours ago Up 46 hours
neutron-dnsmasq-qdhcp-0c78d4af-96cd-4073-9ed6-ce2b7920a91c
e116eab1a16a 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns
exec qdh..." 46 hours ago Up 46 hours
neutron-haproxy-qdhcp-87721945-9f7c-46ca-9ae7-1f66ddc21ca4
ee1cea3e077f 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns
exec qdh..." 46 hours ago Up 46 hours
neutron-dnsmasq-qdhcp-87721945-9f7c-46ca-9ae7-1f66ddc21ca4
...
74cb96f6c028 192.168.100.200:8787/rhosp13/openstack-neutron-l3-agent:13.0-75.1554788897 "ip netns
exec qro..." 46 hours ago Up 46 hours
neutron-haproxy-qrouter-0ae78562-b7de-484c-92bd-a25a7b8e4c63
Network is also created container.](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-24-320.jpg)
![Storage
25
[root@con1 ~]# docker ps | grep cinder-volume
CONTAINER ID IMAGE
COMMAND CREATED STATUS PORTS NAMES
192.168.100.10:8787/rhosp13/openstack-cinder-volume:pcmklatest
"/bin/bash /usr/lo..." 46 hours ago Up 46 hours
openstack-cinder-volume-docker-0
[root@con1 ~]# docker exec -ti openstack-cinder-volume-docker-0 df -h | grep vol
192.168.100.8:/cinder_vol02 13T 204G 13T 2%
/var/lib/cinder/mnt/4081440e749e9be9cab7a6fed1d1feda
192.168.100.8:/cinder_vol01 13T 153G 13T 2%
/var/lib/cinder/mnt/349ddc02366f05b7be11a4afb50828c5
[root@con1 ~]#
In the Cinder backend storage is NFS case, we can see the NFS mount point in the container.](https://image.slidesharecdn.com/howtoopreatecontainerizedopenstack-191002022416/85/How-to-operate-containerized-OpenStack-25-320.jpg)
How to operate containerized OpenStack
- 1. How to operate containerized openstack 2019.10.01 OpenStack Korea User Group NaleeJang
- 2. Index Openstack services Packages vs Containers How to configure openstack containers How to use openstack containers Summary 2
- 8. TripleO Components 8 OpenStack On OpenStack
- 9. OpenStack Services 9 Undercloud (Director) Controller Compute Red Hat Enterprise Linux 7.x Red Hat Enterprise Linux 7.x Red Hat Enterprise Linux 7.x Docker daemon MariaDB RabbitMQ Redis Nova Neutron Glance Swift Heat Mistral Ironic Zaqar Docker daemon Docker Registry MariaDB RabbitMQ Redis Haproxy Nova Neutron Glance Barbican Aodh Ceilometer Gnocchi Panko Cinder Manila Octavia Heat Pacemaker Horizon Keystone Keystone Docker daemon Nova-compute Neutron-ovs-agent Ceilometer-agent KVM Hypervisor Logrotate-corond VM1 VM2 VM3 VM4 Undercloud Overcloud Deploy Configure Manage
- 11. Packages vs Containers 11 Packages Operating System Sources Process1 Process2 Process3 Containers Operating System Operating System Process1 Operating System Process2 vs Packages types processes are running on host, but in the container environment, the processes are running on container.
- 12. Packages vs Containers 12 Packages Operating System Nova Sources nova-sch eduler nova-con ductor nova-api Containers Operating System Operating System nova-api Operating System nova-sch eduler vs In the packages environment, we can modify service’s configuration. But in the containers environment, we need to rebuild container images for modifying.
- 13. OpenStack nova architecture 13 openstack-nova-api openstack-nova-conductor openstack-nova-consoleauth openstack-nova-novncproxy openstack-nova-scheduler Package’s name nova_metadata nova_api nova_conductor nova_vnc_proxy nova_consoleauth nova_api_cron nova_scheduler nova_placement Container’s name
- 14. OpenStack nova service packages 14 [root@con1 ~]# docker ps | grep nova b306dea9036e 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877 "kolla_start" 3 months ago Up 46 hours (healthy) nova_metadata 1188bebab31a 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877 "kolla_start" 3 months ago Up 46 hours (healthy) nova_api caac257c843b 192.168.100.200:8787/rhosp13/openstack-nova-placement-api:13.0-75.1554788885 "kolla_start" 3 months ago Up 46 hours (healthy) nova_placement 4524d6c0dc8f 192.168.100.200:8787/rhosp13/openstack-nova-scheduler:13.0-76.1554788862 "kolla_start" 3 months ago Up 46 hours (healthy) nova_scheduler 41c245f38044 192.168.100.200:8787/rhosp13/openstack-nova-novncproxy:13.0-77.1554788872 "kolla_start" 3 months ago Up 46 hours (healthy) nova_vnc_proxy de778fb6a443 192.168.100.200:8787/rhosp13/openstack-nova-consoleauth:13.0-74.1554788860 "kolla_start" 3 months ago Up 46 hours (healthy) nova_consoleauth 468fd945d50f 192.168.100.200:8787/rhosp13/openstack-nova-api:13.0-76.1554788877 "kolla_start" 3 months ago Up 46 hours nova_api_cron 15baa1302a05 192.168.100.200:8787/rhosp13/openstack-nova-conductor:13.0-74.1554788876 "kolla_start" 3 months ago Up 46 hours (healthy) nova_conductor [root@con1 ~]# Nova’s services container list
- 15. How to configure openstack containers 15
- 16. OpenStack Container Environment 16 Container Operating System Sharing parted resource After modify container configuration, the container’s state will be initialized if container restart. Share Specific space
- 17. OpenStack Container Environment 17 Controller Docker Nova nova_api nova_metadata nova_conductor nova_placement nova_sheduler nova_vnc_proxy ... Red Hat Enterprise Linux 7.6 Neutron neutron_api neutron_ovs_agent neutron_l3_agent neutron_dhcp neutron_metadata_agent Cinder cinder_api cinder_schedulr openstack_cinder_volume_docker0 Glacne glance_api Keystone keystone Horizon horizon Logs Nova /var/log/containers/nova Neutron /var/log/containers/neutron Cinder /var/log/containers/cinder Glance /var/log/containers/glance Horizon /var/log/containers/horizon ... Configs Nova /var/lib/config-data/puppet -generated/nova/etc/nova/ Neutron /var/lib/config-data/puppet -generated/neutron/etc/neut ron/ Cinder /var/lib/config-data/puppet -generated/cinder/etc/cinde r/ Glance /var/lib/config-data/puppet -generated/glance/etc/glanc e/ Horizon /var/lib/config-data/puppet -generated/horizon/etc/open stack-dashboard/ ... Mount Mount Mount Mount Mount ... Mount Mount Mount Mount Mount ... Container Directory rhel7.6 rhel7.6 rhel7.6 rhel7.6 rhel7.6 rhel7.6
- 18. How to configure OpenStack 18 [root@con1 puppet-generated]# cd /var/lib/config-data/puppet-generated/nova [root@con1 nova]# ll total 0 drwxr-xr-x. 6 root root 62 Sep 29 01:56 etc drwxr-xr-x. 4 root root 30 Aug 7 09:34 var [root@con1 nova]# [root@con1 nova]# ll etc total 0 drwxr-xr-x. 5 root root 54 Aug 7 09:34 httpd drwxr-xr-x. 2 root root 25 Sep 29 01:56 my.cnf.d drwxr-xr-x. 2 root root 23 Aug 7 08:53 nova drwxr-xr-x. 3 root root 20 Aug 1 18:17 systemd [root@con1 nova]# ll etc/nova total 372 -rw-r-----. 1 root 42436 379872 Sep 29 01:56 nova.conf [root@con1 nova]# Containerized OpenStack can configure through specific directory (/var/lib/config-data/puppet-generated)
- 19. How to configure OpenStack 19 [root@con1 nova]# cat etc/nova/nova.conf | grep -v ^# | grep -v ^$ [DEFAULT] rootwrap_config=/etc/nova/rootwrap.conf allow_resize_to_same_host=False vif_plugging_is_fatal=True vif_plugging_timeout=300 ram_allocation_ratio=1.0 instance_name_template=instance-%08x my_ip=172.17.1.11 host=con1.example.com dhcp_domain= firewall_driver=nova.virt.firewall.NoopFirewallDriver ssl_only=True cert=/etc/pki/tls/certs/novnc_proxy.crt key=/etc/pki/tls/private/novnc_proxy.key state_path=/var/lib/nova report_interval=10 ... If modify conf files in shared specific directory, the container will be run after loading conf files of specific directory when container start.
- 20. How to see OpenStack logs 20 [root@con1 nova]# cd /var/log/containers/ [root@con1 containers]# ll total 0 drwxr-xr-x. 2 42402 42402 120 Sep 29 02:27 aodh drwxr-xr-x. 2 42405 42405 85 Sep 29 02:35 ceilometer drwxr-xr-x. 2 42407 42407 106 Sep 29 02:35 cinder drwxr-xr-x. 2 42415 42415 21 Sep 29 02:19 glance drwxr-xr-x. 2 42416 42416 74 Sep 29 02:35 gnocchi drwxr-xr-x. 2 root root 25 Sep 29 02:16 haproxy drwxr-xr-x. 2 42418 42418 73 Sep 29 02:27 heat drwxr-xr-x. 2 apache apache 25 Sep 29 02:03 horizon drwxr-xr-x. 14 root root 219 Sep 29 01:49 httpd drwxr-xr-x. 2 42425 42425 57 Sep 29 11:01 keystone drwxr-xr-x. 2 42434 42434 24 Sep 29 02:07 mysql drwxr-xr-x. 2 42435 42435 147 Sep 29 02:29 neutron drwxr-xr-x. 2 42436 42436 215 Sep 29 02:28 nova ... We can see services directory in the specific directory(/var/log/containers)
- 21. How to see OpenStack logs 21 [root@con1 containers]# cd nova [root@con1 nova]# ll total 3592 -rw-r--r--. 1 42436 42436 1895944 Sep 29 14:09 nova-api.log -rw-r--r--. 1 42436 42436 847896 Sep 29 14:09 nova-api-metadata.log -rw-r--r--. 1 42436 42436 8533 Sep 29 11:01 nova-conductor.log -rw-r--r--. 1 42436 42436 7258 Sep 29 11:01 nova-consoleauth.log -rw-r--r--. 1 42436 42436 84409 Sep 29 02:22 nova-manage.log -rw-r--r--. 1 42436 42436 700 Sep 29 02:27 nova-novncproxy.log -rw-r--r--. 1 42436 42436 271975 Sep 29 14:08 nova-placement-api.log -rw-r--r--. 1 42436 42436 25284 Sep 29 14:08 nova-scheduler.log [root@con1 nova]# tail -f nova-api.log 2019-09-29 14:08:59.717 772 INFO nova.api.openstack.requestlog [req-8d531562-4f33-420c-ae27-dacbb2ad8ee1 f960b35758884d10bc21028180e7d65c 0f4ed0809e3942c99306d70c134d0489 - default default] 172.17.1.11 "OPTIONS /" status: 200 len: 397 microversion: - time: 0.000886 2019-09-29 14:09:01.729 772 INFO nova.api.openstack.requestlog [req-8d531562-4f33-420c-ae27-dacbb2ad8ee1 f960b35758884d10bc21028180e7d65c 0f4ed0809e3942c99306d70c134d0489 - default default] 172.17.1.11 "OPTIONS /" status: 200 len: 397 microversion: - time: 0.000568 We can see logs in the service directory of specific directory.
- 22. How to use openstack containers 22
- 23. Basic Operation Commands 23 [root@con1 ~]# docker stop nova_api [root@con1 ~]# docker start nova_api [root@con1 ~]# docker restart nova_api [root@con1 ~]# docker restart nova_api nova_placement nova_scheduler nova_vnc_proxy nova_consoleauth nova_api_corn nova_conductor nova_metadata Basic Command for controlling and operating services
- 24. Network 24 [root@con1 ~]# docker ps | grep neutron CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4871f1b2259c 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns exec qdh..." 46 hours ago Up 46 hours neutron-haproxy-qdhcp-b8c3caac-ea44-464a-a8ef-f6d698bd53b5 6cc5b74a1c10 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns exec qdh..." 46 hours ago Up 46 hours neutron-dnsmasq-qdhcp-b8c3caac-ea44-464a-a8ef-f6d698bd53b5 59581f77930b 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns exec qdh..." 46 hours ago Up 46 hours neutron-dnsmasq-qdhcp-0c78d4af-96cd-4073-9ed6-ce2b7920a91c e116eab1a16a 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns exec qdh..." 46 hours ago Up 46 hours neutron-haproxy-qdhcp-87721945-9f7c-46ca-9ae7-1f66ddc21ca4 ee1cea3e077f 192.168.100.200:8787/rhosp13/openstack-neutron-dhcp-agent:13.0-77.1554788896 "ip netns exec qdh..." 46 hours ago Up 46 hours neutron-dnsmasq-qdhcp-87721945-9f7c-46ca-9ae7-1f66ddc21ca4 ... 74cb96f6c028 192.168.100.200:8787/rhosp13/openstack-neutron-l3-agent:13.0-75.1554788897 "ip netns exec qro..." 46 hours ago Up 46 hours neutron-haproxy-qrouter-0ae78562-b7de-484c-92bd-a25a7b8e4c63 Network is also created container.
- 25. Storage 25 [root@con1 ~]# docker ps | grep cinder-volume CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 192.168.100.10:8787/rhosp13/openstack-cinder-volume:pcmklatest "/bin/bash /usr/lo..." 46 hours ago Up 46 hours openstack-cinder-volume-docker-0 [root@con1 ~]# docker exec -ti openstack-cinder-volume-docker-0 df -h | grep vol 192.168.100.8:/cinder_vol02 13T 204G 13T 2% /var/lib/cinder/mnt/4081440e749e9be9cab7a6fed1d1feda 192.168.100.8:/cinder_vol01 13T 153G 13T 2% /var/lib/cinder/mnt/349ddc02366f05b7be11a4afb50828c5 [root@con1 ~]# In the Cinder backend storage is NFS case, we can see the NFS mount point in the container.
- 26. Summary 26
- 27. Summary 27 OpenStack can use Bare metal, Virtual Machine, Container. Nowadays, OpenStack environment is transfering from VM to Container. We can modify OpenStack service configuration through shared specific directory between container and host(/var/lib/config-data/puppet-generated). We can see OpenStack service logs through specific directory(/var/log/containers).