haproxy启动失败Jul 26 10:37:55 centos7 haproxy-systemd-wrapper: [ALERT] 207/103755 (

admin

Jul 26 10:37:55 centos7 haproxy-systemd-wrapper: [ALERT] 207/103755 (2730) : Starting proxy Stats: cannot bind socket [0.0.0.0:10000]
修改内核参数 增加一条语句 启动haproxy的时候，允许忽视VIP的存在
9 T2 W4 J- h: K4 _9 Q vim /etc/sysctl.conf
net.ipv4.ip_nonlocal_bind = 1

& W2 w8 d6 ?( F

admin

执行命令，让其生效：
, v4 g! n* {; y! msysctl -p
net.ipv4.ip_nonlocal_bind = 1

admin

Jul 26 10:46:26 centos7 systemd[1]: Started HAProxy Load Balancer.
Jul 26 10:46:26 centos7 systemd[1]: Starting HAProxy Load Balancer...
* e+ F" b0 d' A. K5 f. L9 R  q3 Q* {Jul 26 10:46:26 centos7 haproxy-systemd-wrapper[2744]: haproxy-systemd-wrapper: executing /usr/sbin/haproxy ...-Ds
8 K: }3 N/ t9 R* y" UJul 26 10:46:26 centos7 haproxy-systemd-wrapper[2744]: [WARNING] 207/104626 (2745) : config : 'option forwar...de.
Jul 26 10:46:26 centos7 haproxy-systemd-wrapper[2744]: [ALERT] 207/104626 (2745) : Starting proxy Stats: can...00]
Jul 26 10:46:26 centos7 haproxy-systemd-wrapper[2744]: [ALERT] 207/104626 (2745) : Starting proxy mariadb_cl...06]
Jul 26 10:46:26 centos7 haproxy-systemd-wrapper[2744]: haproxy-systemd-wrapper: exit, haproxy RC=1
( G- {" u: d6 U3 S5 _& L0 O  j4 E: mJul 26 10:46:26 centos7 systemd[1]: haproxy.service: main process exited, code=exited, status=1/FAILURE
% K6 I! t8 h9 R2 w  @Jul 26 10:46:26 centos7 systemd[1]: Unit haproxy.service entered failed state.
% |7 n5 W2 Y: n1 V* j* l3 ]Jul 26 10:46:26 centos7 systemd[1]: haproxy.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

/ @3 ^2 {3 I, m2 c主要是修改内核参数进行限制：

在sysctl.conf文件中加入些参数：
" e- W% v/ Y6 n" B; n
net.ipv4.ip_nonlocal_bind = 1
net.nf_conntrack_max=1048576
; T# Q1 j) ?) w8 r  Q' a& fnet.ipv4.tcp_keepalive_intvl = 3
net.ipv4.tcp_keepalive_time = 60
net.ipv4.tcp_keepalive_probes = 8
; V  ^8 Q4 m# N
# v, ^( w; ]# @9 {6 c( g

执行下
) z& x+ b3 P3 y6 H9 i6 J7 d/ hsysctl -p
6 V% T1 U, T+ u; a0 I5 ~2 o

重启haproxy服务即可
' t& o) f. g" [8 Z, o5 f# V( B7 i8 [