打开/etc/oci-hostname.conf文件,修改PRESERVE_HOSTINFO的值为2。
# This configuration file controls the hostname persistence behavior for Oracle Linux
# compute instance on Oracle Cloud Infrastructure (formerly Baremetal Cloud Services)
# Set PRESERVE_HOSTINFO to one of the following values
# 0 -- default behavior to update hostname, /etc/hosts and /etc/resolv.conf to
# reflect the hostname set during instance creation from the metadata service
# 1 -- preserve user configured hostname across reboots; update /etc/hosts and
# /etc/resolv.conf from the metadata service
# 2 -- preserve user configured hostname across instance reboots; no custom
# changes to /etc/hosts and /etc/resolv.conf from the metadata service,
# but dhclient will still overwrite /etc/resolv.conf
# 3 -- preserve hostname and /etc/hosts entries across instance reboots;
# update /etc/resolv.conf from instance metadata service
PRESERVE_HOSTINFO=2
