9.10.5. Configuring System Control Settings
OpenShift Enterprise uses semaphores, ports, and connection tracking extensively. Apply the following changes to the default
/etc/sysctl.conf file to enable this usage.
Procedure 9.8. To Configure the sysctl Settings:
- Open the
/etc/sysctl.conffile and append the following line to increase kernel semaphores to accommodate more httpds:kernel.sem = 250 32000 32 4096
- Append the following line to the same file to increase the ephemeral port range to accommodate application proxies:
net.ipv4.ip_local_port_range = 15000 35530
- Append the following line to the same file to increase the connection-tracking table size:
net.netfilter.nf_conntrack_max = 1048576
- Append the following line to the same file to enable forwarding for the port proxy:
net.ipv4.ip_forward = 1
- Append the following line to the same file to allow the port proxy to route using loopback addresses:
net.ipv4.conf.all.route_localnet = 1
- Run the following command to reload the
sysctl.conffile and activate the new settings:# sysctl -p /etc/sysctl.conf
Note
If you use the kickstart or bash script, the
configure_sysctl_on_node function performs these steps.
