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keepalived启动日志：这是都是BACKUP和priority都相同时的日志，每次选出的master也不固定；用成功的配置时，直接就收敛了11:46:16 c80 Keepalived[22244]: Starting Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32f211:46:16 c80 Keepalived[22244]: Opening file '/etc/keepalived/keepalived.conf'.

4.1 proxy_cache_pathproxy_cache_path /mnt/hgfs/yumdownloader/tmp levels=1:2 keys_zone=my_cache:100m max_size=500m inactive=3h;server { location / { proxy_cache my_cache; add_header X-Cache $upstream_cache_status; proxy_cache_valid 200 10s; //没有这行时

3.1 A/B testingupstream httplb66 { #ip_hash; server 192.168.11.66:80;}upstream httplb69 { server 192.168.11.69:80;}split_clients "${request_method}AAA" $nodes { 20% httplb66; * httplb69;}server { listen 80; server_name

这里写自定义目录标题2.1 http lb2.2 tcp lb2.3 udp lb2.4 Load-Balancing Methods2.9 Passive Health Checks2.10 Active Health Checks （Plus）2.11 Slow Start（Plus）2.1 http lb使用的是http module，在nginx.conf中http block内使用upstream block：upstream backend { server IP:port weigth

1.2 在RHEL/CentOS上安装编辑生成/etc/yum.repos.d/nginx.repo文件[nginx]name=nginx repobaseurl=http://nginx.org/packages/mainline/OS/OSRELEASE/$basearch/gpgcheck=0enabled=1将OS和OSRELEASE进行替换；2.启动服务，防火墙放开端口 yum install nginx -y systemctl enable nginx.servi