Openstack Compute service is the heart of IaaS (Infrastructure as Service) . Compute nodes are use to create the virtual instance and manage cloud computing systems. Openstack compute node (nova) interacts with keystone service for identity , communicates with glance for server OS images , works with Horizon to provide the dashboard for user access and administration. OpenStack Compute can scale horizontally on standard hardware (x86) by installing hyper-visors(Ex: KVM, Xen , VMware ESXi, Hyper-V ). Unlike other openstack services , Compute services has many modules, API’s and services. Here is the consolidated list of those.
The Compute service relies on a hypervisor to run virtual machine instances. OpenStack can use various hypervisors, but this guide uses KVM.
Configure the controller node for Compute services:
1. Login to the openstack controller node & install the compute packages which are necessary for controller node.
root@OSCTRL-UA:~# apt-get install nova-api nova-cert nova-conductor nova-consoleauth nova-novncproxy nova-scheduler python-novaclient Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libblas3 libgfortran3 libjs-swfobject liblapack3 libquadmath0 nova-common novnc python-amqplib python-cliff python-cliff-doc python-cmd2 python-ecdsa python-jinja2 python-m2crypto python-neutronclient python-nova python-novnc python-numpy python-oslo.rootwrap python-paramiko python-pyasn1 python-pyparsing python-rfc3986 websockify Suggested packages: python-amqplib-doc python-jinja2-doc gcc gfortran python-dev python-nose python-numpy-dbg python-numpy-doc doc-base The following NEW packages will be installed: libblas3 libgfortran3 libjs-swfobject liblapack3 libquadmath0 nova-api nova-cert nova-common nova-conductor nova-consoleauth nova-novncproxy nova-scheduler novnc python-amqplib python-cliff python-cliff-doc python-cmd2 python-ecdsa python-jinja2 python-m2crypto python-neutronclient python-nova python-novaclient python-novnc python-numpy python-oslo.rootwrap python-paramiko python-pyasn1 python-pyparsing python-rfc3986 websockify 0 upgraded, 31 newly installed, 0 to remove and 17 not upgraded. Need to get 7,045 kB of archives. After this operation, 46.0 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://in.archive.ubuntu.com/ubuntu/ trusty-updates/main libquadmath0 amd64 4.8.4-2ubuntu1~14.04 [126 kB]
2. Compute services stores information on Database to retrieve the data quickly. Configure the Compute service with database credentials. Add the below entry in nova.conf file.
root@OSCTRL-UA:~# tail -4 /etc/nova/nova.conf [database] connection = mysql://nova:novadb123@OSCTRL-UA/nova
3.Add the message queue configuration on nova.conf file. We are using RabbitMQ as message queue service.
Note: You need to add the lines below under [default] section in nova.conf.
root@OSCTRL-UA:~# grep -i rabbit -A5 /etc/nova/nova.conf #Add Rabbit MQ config rpc_backend = rabbit rabbit_host = OSCTRL-UA rabbit_password = rabbit123
4.The below configuration required for guest VNC config. Add the controller node IP address like below.
Note: You need to add the lines below under [default] section in nova.conf.
root@OSCTRL-UA:~# grep VNC -A4 /etc/nova/nova.conf #VNC my_ip = 192.168.203.130 vncserver_listen = 192.168.203.130 vncserver_proxyclient_address = 192.168.203.130 root@OSCTRL-UA:~#
5.Remove the nova sqllite DB since we are using mysql. sqllite is default test database on Ubuntu.
root@OSCTRL-UA:~# rm /var/lib/nova/nova.sqlite root@OSCTRL-UA:~#
6.Create the nova DB user on mysql.
root@OSCTRL-UA:~# mysql -u root -pstack Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 51 Server version: 5.5.44-0ubuntu0.14.04.1 (Ubuntu) Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> CREATE DATABASE nova; Query OK, 1 row affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'localhost' IDENTIFIED BY 'novadb123'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON nova.* TO 'nova'@'%' IDENTIFIED BY 'novadb123'; Query OK, 0 rows affected (0.00 sec) mysql> exit Bye root@OSCTRL-UA:~#
7. Create the Compute service tables on Mysql. (nova).
root@OSCTRL-UA:~# su -s /bin/sh -c "nova-manage db sync" nova 2015-09-28 04:26:33.366 20105 INFO migrate.versioning.api [-] 215 -> 216... 2015-09-28 04:26:37.482 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.483 20105 INFO migrate.versioning.api [-] 216 -> 217... 2015-09-28 04:26:37.487 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.488 20105 INFO migrate.versioning.api [-] 217 -> 218... 2015-09-28 04:26:37.492 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.493 20105 INFO migrate.versioning.api [-] 218 -> 219... 2015-09-28 04:26:37.497 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.498 20105 INFO migrate.versioning.api [-] 219 -> 220... 2015-09-28 04:26:37.503 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.504 20105 INFO migrate.versioning.api [-] 220 -> 221... 2015-09-28 04:26:37.509 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.510 20105 INFO migrate.versioning.api [-] 221 -> 222... 2015-09-28 04:26:37.515 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.516 20105 INFO migrate.versioning.api [-] 222 -> 223... 2015-09-28 04:26:37.520 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.521 20105 INFO migrate.versioning.api [-] 223 -> 224... 2015-09-28 04:26:37.525 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.526 20105 INFO migrate.versioning.api [-] 224 -> 225... 2015-09-28 04:26:37.531 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.531 20105 INFO migrate.versioning.api [-] 225 -> 226... 2015-09-28 04:26:37.538 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.538 20105 INFO migrate.versioning.api [-] 226 -> 227... 2015-09-28 04:26:37.545 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.546 20105 INFO migrate.versioning.api [-] 227 -> 228... 2015-09-28 04:26:37.575 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.576 20105 INFO migrate.versioning.api [-] 228 -> 229... 2015-09-28 04:26:37.605 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.606 20105 INFO migrate.versioning.api [-] 229 -> 230... 2015-09-28 04:26:37.654 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.654 20105 INFO migrate.versioning.api [-] 230 -> 231... 2015-09-28 04:26:37.702 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.703 20105 INFO migrate.versioning.api [-] 231 -> 232... 2015-09-28 04:26:37.962 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:37.963 20105 INFO migrate.versioning.api [-] 232 -> 233... 2015-09-28 04:26:38.006 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.006 20105 INFO migrate.versioning.api [-] 233 -> 234... 2015-09-28 04:26:38.042 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.043 20105 INFO migrate.versioning.api [-] 234 -> 235... 2015-09-28 04:26:38.048 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.049 20105 INFO migrate.versioning.api [-] 235 -> 236... 2015-09-28 04:26:38.054 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.055 20105 INFO migrate.versioning.api [-] 236 -> 237... 2015-09-28 04:26:38.060 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.060 20105 INFO migrate.versioning.api [-] 237 -> 238... 2015-09-28 04:26:38.067 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.068 20105 INFO migrate.versioning.api [-] 238 -> 239... 2015-09-28 04:26:38.072 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.073 20105 INFO migrate.versioning.api [-] 239 -> 240... 2015-09-28 04:26:38.079 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.080 20105 INFO migrate.versioning.api [-] 240 -> 241... 2015-09-28 04:26:38.084 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.085 20105 INFO migrate.versioning.api [-] 241 -> 242... 2015-09-28 04:26:38.089 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.090 20105 INFO migrate.versioning.api [-] 242 -> 243... 2015-09-28 04:26:38.095 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.096 20105 INFO migrate.versioning.api [-] 243 -> 244... 2015-09-28 04:26:38.110 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.111 20105 INFO migrate.versioning.api [-] 244 -> 245... 2015-09-28 04:26:38.187 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.188 20105 INFO migrate.versioning.api [-] 245 -> 246... 2015-09-28 04:26:38.207 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.208 20105 INFO migrate.versioning.api [-] 246 -> 247... 2015-09-28 04:26:38.259 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.260 20105 INFO migrate.versioning.api [-] 247 -> 248... 2015-09-28 04:26:38.267 20105 INFO 248_add_expire_reservations_index [-] Skipped adding reservations_deleted_expire_idx because an equivalent index already exists. 2015-09-28 04:26:38.272 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.272 20105 INFO migrate.versioning.api [-] 248 -> 249... 2015-09-28 04:26:38.290 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.291 20105 INFO migrate.versioning.api [-] 249 -> 250... 2015-09-28 04:26:38.309 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.309 20105 INFO migrate.versioning.api [-] 250 -> 251... 2015-09-28 04:26:38.338 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.339 20105 INFO migrate.versioning.api [-] 251 -> 252... 2015-09-28 04:26:38.431 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.432 20105 INFO migrate.versioning.api [-] 252 -> 253... 2015-09-28 04:26:38.463 20105 INFO migrate.versioning.api [-] done 2015-09-28 04:26:38.464 20105 INFO migrate.versioning.api [-] 253 -> 254... 2015-09-28 04:26:38.498 20105 INFO migrate.versioning.api [-] done root@OSCTRL-UA:~#
8. Create the nova users on keystone. So that Compute uses to authenticate with the Identity Service.
root@OSCTRL-UA:~# keystone user-create --name=nova --pass=nova123 --email=nova@unixarena.com +----------+----------------------------------+ | Property | Value | +----------+----------------------------------+ | email | nova@unixarena.com | | enabled | True | | id | 0a8ef9375329415488361b4ea7267443 | | name | nova | | username | nova | +----------+----------------------------------+ root@OSCTRL-UA:~#
9. Provide the admin role to the nova user.
root@OSCTRL-UA:~# keystone user-role-add --user=nova --tenant=service --role=admin root@OSCTRL-UA:~#
10. Edit the nova.conf to update the keystone credentials that we create it .
Note: You need to add “auth_strategy = keystone” under [default] section in nova.conf.
root@OSCTRL-UA:~# grep keystone -A8 /etc/nova/nova.conf auth_strategy = keystone [keystone_authtoken] auth_uri = http://OSCTRL-UA:5000 auth_host = OSCTRL-UA auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = nova admin_password = nova123 root@OSCTRL-UA:~#
11. Register the compute service with identity service.
root@OSCTRL-UA:~# keystone service-create --name=nova --type=compute --description="OpenStack Compute" +-------------+----------------------------------+ | Property | Value | +-------------+----------------------------------+ | description | OpenStack Compute | | enabled | True | | id | 083b455a487647bbaa05a4a53b3a338f | | name | nova | | type | compute | +-------------+----------------------------------+ root@OSCTRL-UA:~#
12. Create the end point service for nova.
root@OSCTRL-UA:~# keystone endpoint-create --service-id=$(keystone service-list | awk '/ compute / {print $2}') --publicurl=http://OSCTRL-UA:8774/v2/%\(tenant_id\)s --internalurl=http://OSCTRL-UA:8774/v2/%\(tenant_id\)s --adminurl=http://OSCTRL-UA:8774/v2/%\(tenant_id\)s
+-------------+----------------------------------------+
| Property | Value |
+-------------+----------------------------------------+
| adminurl | http://OSCTRL-UA:8774/v2/%(tenant_id)s |
| id | 4e2f418ef1eb4083a655e0a4eb60b736 |
| internalurl | http://OSCTRL-UA:8774/v2/%(tenant_id)s |
| publicurl | http://OSCTRL-UA:8774/v2/%(tenant_id)s |
| region | regionOne |
| service_id | 083b455a487647bbaa05a4a53b3a338f |
+-------------+----------------------------------------+
root@OSCTRL-UA:~#
13. Restart the services.
root@OSCTRL-UA:~# service nova-api restart; service nova-cert restart; service nova-consoleauth restart; service nova-scheduler restart; service nova-conductor restart; service nova-novncproxy restart; nova-api stop/waiting nova-api start/running, process 20313 nova-cert stop/waiting nova-cert start/running, process 20330 nova-consoleauth stop/waiting nova-consoleauth start/running, process 20347 nova-scheduler stop/waiting nova-scheduler start/running, process 20366 nova-conductor stop/waiting nova-conductor start/running, process 20385 nova-novncproxy stop/waiting nova-novncproxy start/running, process 20400 root@OSCTRL-UA:~#
Verify the service status,
root@OSCTRL-UA:~# service nova-api status; service nova-cert status; service nova-consoleauth status; service nova-scheduler status; service nova-conductor status; service nova-novncproxy status nova-api start/running, process 20313 nova-cert start/running, process 20330 nova-consoleauth start/running, process 20347 nova-scheduler start/running, process 20366 nova-conductor start/running, process 20385 nova-novncproxy start/running, process 20400 root@OSCTRL-UA:~#
14. You should be able to verify the nova configuration by listing the images.
root@OSCTRL-UA:~# nova image-list +--------------------------------------+--------------+--------+--------+ | ID | Name | Status | Server | +--------------------------------------+--------------+--------+--------+ | 7d19b639-6950-42dc-a64d-91c6662e0613 | CirrOS 0.3.0 | ACTIVE | | +--------------------------------------+--------------+--------+--------+ root@OSCTRL-UA:~#
We have successfully configured the compute configuration on the controller node.
Click page 2 to see the configuration on the Compute node.
Pages: Page 1 Page 2
obfuscatu says
I removed /var/lib/nova/nova.sqlite but is recreated
obfuscatu says
can’t start nova-scheduler and nova-cert: attempt to write readonly database !