High Availability Cluster (高可用集群)

Website Service High Availability Cluster (网站服务高可用集群)
Apache + Pacemaker
Storage Services High Availability Cluster (存储服务高可用集群)
Inotifywait + Rsync
Distributed Replicated
Block Device
 (DRBD)
DRBD + Pacemaker + NFS
DRBD + Keepalived + NFS + Shell
FTP + Pacemaker
MariaDB & MySQL Database High Availability Cluster (MariaDB & MySQL 数据库高可用集群)
MariaDB & MySQL
Highly Availability
(高可用)
MariaDB Galera Cluster
(MGC)
MySQL Group Replication
(MGR)
Master HA
(MHA)
Master-Master
Replication Manager
for
MySQL
(MMM)
Percona XtraDB Cluster 
(PXC)
Other Database High Availability Cluster (其它数据库高可用集群)
MongoDB
High Availability
(高可用)
ElasticSearch
High Availability
(高可用)
Redis
High Availability
(高可用)