This chapter describes the operation of GLS on RHOSP. On RHOSP environment, GLS can be used on virtual machine instances. For details on RHOSP, refer to the RHOSP manual issued by Red Hat, Inc.
Note the following settings when using GLS on RHOSP environment.
Only the single physical interface configuration of virtual NIC mode can be supported.
Specify the DNS server to be used.
For RHEL8, add the following settings in the configuration file of the virtual interface (ifcfg-shaX).
Add the setting "PEERDNS=yes".
Add the settings "DNS1=<DNSServer1>" and "DNS2=<DNSServer2>".
For RHEL9, set the following parameters to the virtual interface (shaX) with the "nmcli connection modify" comand.
ipv4.ignore-auto-dns: "yes" ipv4.dns: "<DNSServer1>, <DNSServer2>" |
For RHEL8, do not set SHAMACADDR in the configuration file of the virtual interface (ifcfg-shaX). For RHEL9, do not specify the "-s" option when creating the virtual interface with the "hanetconfig create" command.
To use a virtual router as the monitoring destination, it is recommended to set the virtual router to be redundant.
Also set the time to detect a network error in GLS to be longer than the time to switch the redundant virtual router.
When not setting a virtual router used as a monitoring target to be redundant, set to avoid a failover of the cluster even when an error is detected in the transfer route.
# /opt/FJSVhanet/usr/sbin/hanetpathmon param -n shaX -f no |
When configuring the static route information on the guest OS in the RHOSP environment when BOOTPROTO is set as dhcp, add and configure the static route information for the DHCP server of neutron in the subnet.
# neutron subnet-update --host-route destination=CIDR,nexthop=IPaddress subnetname |
