CentOS7.4 network.service NetworkManager.service 冲突

最近在玩dpdk kni，往kni虚拟口上使用ifconfig配置ip地址，发现配置的ip会无缘无故消失，以为是kni的bug，后面经同事指点，说有可能是networkmanager导致的，故查看了一下syslog日志：

tailf /var/log/message
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9582] dhcp4 (veth0): request timed out
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9582] dhcp4 (veth0): state changed unknown -> timeout
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9661] dhcp4 (veth0): canceled DHCP transaction, DHCP client pid 7268
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9661] dhcp4 (veth0): state changed timeout -> done
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9663] device (veth0): state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9666] device (veth0): Activation: failed for connection '有线连接 1'
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9668] device (veth0): state change: failed -> disconnected (reason 'none') [120 30 0]
Nov 29 16:02:55 localhost avahi-daemon[837]: Withdrawing address record for fe80::e4f6:11b0:eb3b:c94b on veth0.
Nov 29 16:02:55 localhost avahi-daemon[837]: Withdrawing address record for 172.28.106.10 on veth0.
Nov 29 16:02:55 localhost avahi-daemon[837]: Leaving mDNS multicast group on interface veth0.IPv4 with address 172.28.106.10.
Nov 29 16:02:55 localhost avahi-daemon[837]: Interface veth0.IPv4 no longer relevant for mDNS.
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9709] policy: auto-activating connection '有线连接 1'
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9716] device (veth0): Activation: starting connection '有线连接 1' (355aaef2-573d-39d3-b197-3c711d960b9d)
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9735] device (veth0): state change: disconnected -> prepare (reason 'none') [30 40 0]
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9739] device (veth0): state change: prepare -> config (reason 'none') [40 50 0]
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9740] device (veth0): driver 'unknown' does not support carrier detection.
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9743] device (veth0): state change: config -> ip-config (reason 'none') [50 70 0]
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9744] dhcp4 (veth0): activation: beginning transaction (timeout in 45 seconds)
Nov 29 16:02:55 localhost NetworkManager[843]:   [1575014575.9758] dhcp4 (veth0): dhclient started with pid 7319
Nov 29 16:02:55 localhost dhclient[7319]: DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 4 (xid=0x216e37f9)
Nov 29 16:02:57 localhost avahi-daemon[837]: Registering new address record for fe80::e4f6:11b0:eb3b:c94b on veth0.*.
Nov 29 16:02:59 localhost dhclient[7319]: DHCPDISCOVER on veth0 to 255.255.255.255 port 67 interval 8 (xid=0x216e37f9)

这里面会对kni虚拟接口进行操作，会使用dhcp获取IP地址，罪魁祸首原来是NetworkManager，那就把NetworkManager给关闭。使用如下命令进行关闭：

systemctl stop NetworkManager
systemctl disable NetworkManager
systemctl start network

重启设备后，发现ifconfig看不到网卡相关信息，这要修改网卡配置，具体目录为：/etc/sysconfig/network-scripts/，修改示例如下所示：

TYPE=Ethernet
BOOTPROTO=none
DEVICE=eth0
ONBOOT=yes  # 需要设置为开机启动
#DNS2=114.114.114.114
#DNS1=127.0.0.1
IPADDR=10.0.0.57
PREFIX=24
GATEWAY=10.0.0.1
NM_CONTROLLED=no  # add this line，关键

修改完相关网卡的配置，保存，重启后就可以了。