2.168.56.255 scope global enp0s8 valid_lft forever preferred_lft forever inet6 fe80::2668:a979:15c:d0aa/64 scope link valid_lft forever preferred_lft forever 4: enp0s9:
mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:d6:e8:2e brd ff:ff:ff:ff:ff:ff inet 192.168.165.100/24 brd 192.168.165.255 scope global enp0s9 valid_lft forever preferred_lft forever inet6 fe80::d3e9:3afe:3525:7573/64 scope link valid_lft forever preferred_lft forever [root@nodeb ~]# ip a 1: lo:
mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp0s3:
mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:91:f3:46 brd ff:ff:ff:ff:ff:ff inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic enp0s3 valid_lft 85943sec preferred_lft 85943sec inet6 fe80::7db3:6c82:36a3:f295/64 scope link valid_lft forever preferred_lft forever 3: enp0s8:
mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:ea:5e:58 brd ff:ff:ff:ff:ff:ff inet 192.168.56.200/24 brd 192.168.56.255 scope global enp0s8 valid_lft forever preferred_lft forever inet6 fe80::b62d:2715:66a3:d819/64 scope link valid_lft forever preferred_lft forever 4: enp0s9:
mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 08:00:27:eb:82:db brd ff:ff:ff:ff:ff:ff inet 192.168.165.200/24 brd 192.168.165.255 scope global enp0s9 valid_lft forever preferred_lft forever inet6 fe80::e89d:cdaa:ec18:29e9/64 scope link valid_lft forever preferred_lft forever
删除多个默认网关
# route del default enp0s8
# route del default enp0s9
nodea、nodeb修改/etc/hosts
# vi /etc/hosts
192.168.56.100 nodea
192.168.56.200 nodeb
192.168.165.100 nodea-priv
192.168.165.200 nodeb-priv
192.168.56.101 nodea-vip
192.168.56.201 nodeb-vip
192.168.56.110 node-scan
nodea、nodeb修改主机名
# vi /etc/hostname
orada
# vi /etc/hostname
oradb
nodea、nodeb检查 shm 和 swap
shm 是oracle 的amm需要的
# df -h /dev/shm
# free -m
# vi /etc/fstab
tmpfs /dev/shm tmpfs defaults,size=3072m 0 0
关闭selinux：
临时修改：
set enforce 0
永久修改：
vi /etc/selinux/config
SELINUX=DISABLED
vi /etc/sysconfig/selinux
SELINUX=DISABLED
查看两个文件是ln -s 的关系：
ls -l /etc/sysconfig/selinux
/etc/sysconfig/selinux -> ../selinux/config
nodea、nodeb修改内核参数
vi /etc/sysctl.conf
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
#ORACLE SETTING
#kernel.shmall = 2097152
#kernel.shmmax = 536870912 # Bytes
kernel.shmmni = 4096
fs.aio-max-nr = 1048576
fs.file-max = 68116544
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048586
立即生效
sysctl -p
# lsipc
RESOURCE DESCRIPTION LIMIT USED USE%
MSGMNI Number of message queues 6013 0 0.00%
MSGMAX Max size of messa