OpenStack Ocata : Add Compute Nodes

Add Compute Nodes to run more instances. This example is based on the emvironment like follows. ------------+-----------------------------+------------ | | eth0|10.0.0.30 eth0|10.0.0.51 +-----------+-----------+ +-----------+-----------+ | [ Control Node ] | | [ Compute Node ] | | | | | | MariaDB RabbitMQ | | Libvirt | | Memcached httpd | | Nova Compute | | Keystone Glance | | | | Nova API | | | +-----------------------+ +-----------------------+

[1]	Install KVM Hypervisor on Compute Node. It's unnecessary to set Bridge networking on the section [2] of the link.
[2]	Install Nova-Compute.

# install from Ocata, EPEL [root@node01 ~]#  yum --enablerepo=centos-openstack-ocata,epel -y install openstack-nova-compute

[3]	Configure Nova.

[root@node01 ~]#  mv /etc/nova/nova.conf /etc/nova/nova.conf.org  [root@node01 ~]#  vi /etc/nova/nova.conf # create new [DEFAULT] # define own IP address my_ip = 10.0.0.51 state_path = /var/lib/nova enabled_apis = osapi_compute,metadata log_dir = /var/log/nova # RabbitMQ connection info transport_url = rabbit://openstack:password@10.0.0.30 [api] auth_strategy = keystone # enable VNC [vnc] enabled = True vncserver_listen = 0.0.0.0 vncserver_proxyclient_address = $my_ip novncproxy_base_url = http://10.0.0.30:6080/vnc_auto.html # Glance connection info [glance] api_servers = http://10.0.0.30:9292 [oslo_concurrency] lock_path = $state_path/tmp # Keystone auth info [keystone_authtoken] auth_uri = http://10.0.0.30:5000 auth_url = http://10.0.0.30:35357 memcached_servers = 10.0.0.30:11211 auth_type = password project_domain_name = default user_domain_name = default project_name = service username = nova password = servicepassword [placement] auth_url = http://10.0.0.30:35357 os_region_name = RegionOne auth_type = password project_domain_name = default user_domain_name = default project_name = service username = placement password = servicepassword [wsgi] api_paste_config = /etc/nova/api-paste.ini [root@node01 ~]#  chmod 640 /etc/nova/nova.conf  [root@node01 ~]#  chgrp nova /etc/nova/nova.conf

[4]	If SELinux is enabled, change policy like follows.

[root@node01 ~]#  vi nova-compute_pol.te # create new module nova-compute_pol 1.0; require { type nova_t; type nova_var_lib_t; type nova_log_t; type virtlogd_t; type sysctl_net_t; type netutils_exec_t; class file { read append getattr create open execute }; class dir { write search add_name }; class capability { dac_override kill sys_ptrace }; class capability2 block_suspend; } #============= nova_t ============== allow nova_t netutils_exec_t:file execute; allow nova_t self:capability kill; allow nova_t sysctl_net_t:dir search; allow nova_t sysctl_net_t:file { read getattr open }; allow nova_t self:capability sys_ptrace; allow nova_t self:capability2 block_suspend; #============= virtlogd_t ============== allow virtlogd_t nova_var_lib_t:dir search; allow virtlogd_t nova_var_lib_t:file { append getattr open }; allow virtlogd_t self:capability dac_override; [root@node01 ~]#  checkmodule -m -M -o nova-compute_pol.mod nova-compute_pol.te  checkmodule: loading policy configuration from nova-compute_pol.te checkmodule: policy configuration loaded checkmodule: writing binary representation (version 17) to nova-compute_pol.mod [root@node01 ~]#  semodule_package --outfile nova-compute_pol.pp --module nova-compute_pol.mod  [root@node01 ~]#  semodule -i nova-compute_pol.pp

[5]	Start Nova Services.

[root@node01 ~]#  systemctl start openstack-nova-compute  [root@node01 ~]#  systemctl enable openstack-nova-compute

[6]	Make sure the status of Nova services on Controle Node like here. If all State is "up", they are running normally.

# discover Compute Nodes [root@dlp ~(keystone)]#  su -s /bin/bash nova -c "nova-manage cell_v2 discover_hosts" [root@dlp ~(keystone)]#  openstack compute service list  +----+------------------+------------------+----------+---------+-------+----------------------------+ | ID | Binary | Host | Zone | Status | State | Updated At | +----+------------------+------------------+----------+---------+-------+----------------------------+ | 5 | nova-cert | dlp.srv.world | internal | enabled | up | 2017-02-28T14:18:50.000000 | | 6 | nova-consoleauth | dlp.srv.world | internal | enabled | up | 2017-02-28T14:18:50.000000 | | 7 | nova-conductor | dlp.srv.world | internal | enabled | up | 2017-02-28T14:18:50.000000 | | 8 | nova-scheduler | dlp.srv.world | internal | enabled | up | 2017-02-28T14:18:50.000000 | | 9 | nova-compute | node01.srv.world | nova | enabled | up | 2017-02-28T14:18:52.000000 | +----+------------------+------------------+----------+---------+-------+----------------------------+