高可用web服务构建2

高可用Web服务介绍2安装和配置HAProxyandKeepalived这所有的节点（ubuntu系统）上安装HAProxyandKeepalivedapt-getinstallhaproxyapt-getinstallkeepalived3net.ipv4设定HAProxy中的负载均衡还需要能够绑定到非本地IP地址，这意味着它不会分配给本地系统上的设备。添加下面的配置，以便可以将浮动/共享IP分配给其中一个负载平衡器。net.ipv4.ip_nonlocal_bind=1现在你知道上面的事情了，让我们编辑一下sysctl.conf。vim/etc/sysctl.conf增加如下一行net.ipv4.ip_nonlocal_bind=1如果想让修改生效，必须返回命令行输入一下使其生效sysctl-p4keepalived.conf现在让我们在每个节点上创建keepalived.conf文件。以下所有的Keepalived配置都在Keepalived提供的用户指南中进行了介绍，并参考本指南。主节点配置servicekeepalivedstartglobal_defs{lvs_idhaproxy_DH#Keepalivedprocessidentifiervrrp_scriptcheck_haproxy{script"killall-0haproxy"#ScriptusedtocheckifHAProxyisrunninginterval2weight2}#Virtualinterfacvrrp_instanceVI_01{stateMASTERinterfaceeth0virtual_router_id51priority101#Thevirtualipaddresssharedbetweenthetwoloadbalancersvirtual_ipaddress{64}track_script{check_haproxy}}从节点配置servicekeepalivedstartglobal_defs{lvs_idhaproxy_DH_passive#Keepalivedprocessidentifier}#ScriptusedtocheckifHAProxyisrunningvrrp_scriptcheck_haproxy{script"killall-0haproxy"interval2weight2}#Virtualinterface，Thepriorityspecifiestheorderinwhichtheassignedinterfacetotakeoverinafailovervrrp_instanceVI_01{stateSLAVEinterfaceeth0virtual_router_id51priority100virtual_ipaddress{64#Thevirtualipaddresssharedbetweenthetwoloadbalancers}track_script{check_haproxy}}5haproxy.confgloballoglocal0loglocal1notice#logloghostlocal0infomaxconn4096#chroot/usr/share/haproxyuserhaproxygrouphaproxydaemondefaultslogglobalmodehttpoptionhttplogoptiondontlognullretries3optionredispatchmaxconn2000contimeout5000clitimeout50000srvtimeout50000listenstats192.168.6.ABC:8989modehttpstatsenablestatsuri/statsstatsrealmHAProxy\Statisticsstatsauthadmin:adminlistenam_cluster:80modehttpbalanceroundrobinoptionhttpcloseoptionforwardforcookieSERVERNAMEinsertindirectnocacheserveram-