关于mysql:KunlunDB集群管理接口

KunlunDB在0.9版本之后，减少了运维监控平台(Xpanel), 通过集群治理（Cluster_mgr）的HTTP命令接口，能够实现对整个集群环境进行治理和监控。

以下是具体的命令接口介绍：
获取cluster工作状态，POST接口：

curl -d "{\"job_type\":\"get_status\",\"job_id\":\"uuid999\"}" http://127.0.0.1:57000

因为创立集群，和复原一个新集群，会生成新的集群名称，通过get_status这个命令获取状态时，如果返回result为succeed，那info就是新集群的名称。

命令接管：

{"result":"accept"}

胜利返回：

{"result":"done","info":"something done"}

正在工作：

{"result":"ongoing","info":"something ongoing"}

失败返回：

{"result":"failed","info":"something error"}

创立机器, 异步，须要查问，不阻塞其余操作。

返回result=done/failed,info:create machine succeed(或者错误信息)。
操作表记录：info:create machine succeed(或者错误信息)。

门路为根门路，必须存在，total_mem单位是Mbyte。

{"ver":"0.1","job_id":"uuid999","job_type":"create_machine","hostaddr":"127.0.0.1","rack_id":"1","datadir":"/home/kunlun;/nvme2","logdir":"/home/kunlun;/nvme3","wal_log_dir":"/home/kunlun","comp_datadir":"/nvme2","total_mem":"1024","total_cpu_cores":"8","user_name":"zhangsan"}

更新机器, 异步，须要查问，不阻塞其余操作。
返回result=done/failed时, info:update machine succeed(或者错误信息)。
操作表记录：info:update machine succeed(或者错误信息)。
门路为根门路，必须存在，total_mem单位是Mbyte。

{"ver":"0.1","job_id":"uuid999","job_type":"update_machine","hostaddr":"127.0.0.1","rack_id":"1","datadir":"/home/kunlun;/nvme2","logdir":"/home/kunlun;/nvme3","wal_log_dir":"/home/kunlun","comp_datadir":"/nvme2","total_mem":"4096","total_cpu_cores":"8","user_name":"zhangsan"}

删除机器, 异步，须要查问，不阻塞其余操作。

返回result=done/failed时, info:delete machine succeed(或者错误信息)。
操作表记录：info:delete machine succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"delete_machine","hostaddr":"127.0.0.1","user_name":"zhangsan"}

创立集群, 异步，须要查问。

返回result=done时, info:集群名称。
操作表记录：info:create cluster succeed(或者错误信息)。
max_storage_size单位是G, innodb_size单位是G。
innodb_size按要求先默认1G吧，范畴1-16G。
user_name为网页端应用，保留到操作记录外面。
machine为指定装置机器，以machine0开始。

{"ver":"0.1","job_id":"uuid999","job_type":"create_cluster","ha_mode":"mgr","shards":"2","nodes":"1","comps":"1","max_storage_size":"20","max_connections":"6","cpu_cores":"8","innodb_size":"1","user_name":"zhangsan","machinelist":[{"hostaddr":"127.0.0.2"},{"hostaddr":"127.0.0.3"}]}

删除集群, 异步，须要查问。

返回result=done时, info:集群名称。
操作表记录：info:delete cluster succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"delete_cluster","cluster_name":"cluster001","user_name":"zhangsan"}

在现有集群上，新增分片，能够减少多个。

返回result=done时, info:shard2;shard3。
操作表记录：info:add shards succeed(或者错误信息)。
分片名称排列,分隔符改为分号，因为之前创立机器的门路也是分号，对立了比拟好。

{"ver":"0.1","job_id":"uuid999","job_type":"add_shards","cluster_name":"cluster001","shards":"2","user_name":"zhangsan","machinelist":[{"hostaddr":"127.0.0.2"},{"hostaddr":"127.0.0.3"}]}

在现有集群上，删除分片，只能一个一个删

返回result=done时, info:删除分片名。
操作表记录：info:delete shard succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"delete_shard","cluster_name":"cluster001","shard_name":"shard1","user_name":"zhangsan"}

在现有集群上，新增计算节点，能够减少多个。

返回result=done时, info:comp2;comp3。
操作表记录：info:add comps succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"add_comps","cluster_name":"cluster001","comps":"2","user_name":"zhangsan","machinelist":[{"hostaddr":"127.0.0.2"},{"hostaddr":"127.0.0.3"}]}

在现有集群上，删除计算节点，只能一个一个删。

返回result=done时, info:删除计算节点名。
操作表记录：info:delete shard succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"delete_comp","cluster_name":"cluster001","comp_name":"comp1","user_name":"zhangsan"}

为集群所有分片减少node, 异步，须要查问。

带有shard_name字段，只减少该分片，否则所有分片都减少。
返回result=done时, info:ip:port;ip:port,分隔符分号。
操作表记录：info:add nodes succeed(或者错误信息)。
该操作只能是MGR模式，先备份分片，创立出新NODE, 把备份复原到新NODE, 将新NODE退出分片。

{"ver":"0.1","job_id":"uuid999","job_type":"add_nodes","cluster_name":"cluster001","shard_name":"shard1","nodes":"2","user_name":"zhangsan","machinelist":[{"hostaddr":"127.0.0.2"},{"hostaddr":"127.0.0.3"}]}

某个分片删除node, 异步，须要查问。

返回result=done时, info:ip:port,分隔符分号。
操作表记录：info:delete node succeed(或者错误信息)。
该操作只能是MGR模式，先备份分片，创立出新NODE, 把备份复原到新NODE, 将新NODE退出分片。

{"ver":"0.1","job_id":"uuid999","job_type":"delete_node","cluster_name":"cluster001","shard_name":"shard1","ip":"127.0.0.1","port":"57338","user_name":"zhangsan"}

备份集群, 异步，须要查问。

返回result=done时, info:备份的工夫。
操作表记录：info:backup cluster succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"backup_cluster","backup_cluster_name":"cluster001","user_name":"zhangsan"}

复原集群, 异步，须要查问，该命令敞开，不给客户执行。

返回result=done时, info:复原集群名称。
操作表记录：info:restore cluster succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"restore_cluster","timestamp":"2021-12-20 19:22:20","backup_cluster_name":"cluster003","restore_cluster_name":"cluster004","user_name":"zhangsan"}

复原出新集群, 异步，须要查问

返回result=done时, info:新集群名称。
操作表记录：info:restore new cluster succeed(或者错误信息)。

{"ver":"0.1","job_id":"uuid999","job_type":"restore_new_cluster","timestamp":"2021-12-20 19:22:20","backup_cluster_name":"cluster003","user_name":"zhangsan","machinelist":[{"hostaddr":"127.0.0.2"},{"hostaddr":"127.0.0.3"}]}

获取元数据MGR模式,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_meta_mode"}

获取元数据节点列表,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_meta"}

获取所有集群列表,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_cluster"}

获取集群存储节点列表,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_storage","cluster_name":"cluster003"}

获取集群计算节点列表,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_computer","cluster_name":"cluster003"}

获取实例变量,同步返回。

{"ver":"0.1","job_id":"uuid999","job_type":"get_variable","variable":"innodb_buffer_pool_size","ip":"127.0.0.1","port":"57338"}

设置实例变量,同步返回。

优先整型value_int, 找不到再找字符串value_str

{"ver":"0.1","job_id":"uuid999","job_type":"set_variable","variable":"innodb_buffer_pool_size","value_int":"134217728","value_str":"134217728","ip":"127.0.0.1","port":"57338"}

管制实例，异步，须要查问。

包含进行(stop)/启动(start)/重启(restart)三个操作。

{"ver":"0.1","job_id":"uuid999","job_type":"control_instance","control":"stop","ip":"127.0.0.1","port":"57338","user_name":"zhangsan"}

更新prometheus数据，异步，须要查问。

机器IP,从元数据表读取，PORT从配置文件读取。

{"ver":"0.1","job_id":"uuid999","job_type":"update_prometheus","user_name":"zhangsan"}

prometheus连贯到PostgreSQL。

{"ver":"0.1","job_id":"uuid999","job_type":"postgres_exporter","ip":"127.0.0.1","port":"57030","user_name":"zhangsan"}

prometheus连贯到MySQL。

{"ver":"0.1","job_id":"uuid999","job_type":"mysqld_exporter","ip":"127.0.0.1","port":"57330","user_name":"zhangsan"}

KunlunDB我的项目已开源

【GitHub：】
https://github.com/zettadb

【Gitee：】
https://gitee.com/zettadb

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