Pegasus为MetaServer和ReplicaServer提供了HTTP接口，用于查看集群相关信息，查询服务器信息等。
接口共分为服务器信息查询、表管理和节点管理三类，其中服务器信息查询类中的指令同时支持对ReplicaServer和MetaServer的访问，其它指令支持MetaServer。
当访问备用MetaServer的表管理和节点管理类接口时，由于相关信息保存在主MetaServer中，会自动重定向至主MetaServer对应的接口。
所有接口均返回JSON格式。
/version功能： 获取应用的版本
示例：127.0.0.1:34801/version
返回：
{ "GitCommit": "cf428dc0ef995b961809df860e783417de7757fc", "Version": "1.12.SNAPSHOT" }
/recentStartTime功能： 获取进程启动时间
示例：127.0.0.1:34801/recentStartTime
返回：
{ "RecentStartTime": "2019-08-14 00:22:00" }
/pprof/profile功能： 获取server的cpu采样
示例1：127.0.0.1:34801/pprof/profile?seconds=10
返回： profile文件
示例2： 推荐使用google/pprof Web UI
pprof --http=:8080 http://127.0.0.1:34801/pprof/heap
/pprof/symbol功能： 获取symbol信息
示例1：127.0.0.1:34801/pprof/symbol
返回： 非post请求，返回symbol个数
num_symbols: 46225
示例2：curl 127.0.0.1:34801/pprof/symbol -X POST -d "123455"
返回： post请求，返回输入地址对应的symbol
0x00123455 boost::asio::detail::keyword_tss_ptr
/pprof/heap功能： 获取server的内存采样
示例1：127.0.0.1:34801/pprof/heap
返回： heap profile文本
示例2： 推荐使用google/pprof Web UI
pprof --http=:8080 http://127.0.0.1:34801/pprof/heap
注意： 需在被采样server所在机器设置环境变量TCMALLOC_SAMPLE_PARAMETER
/pprof/cmdline功能： 获取/proc/self/cmdline内容
示例：127.0.0.1:34801/pprof/cmdline
返回：
/somepath/pegasus/onebox/replica1/pegasus_server config.ini -app_list replica
/pprof/growth功能： 获取growth profile
示例：127.0.0.1:34801/pprof/growth
返回： growth profile文本
/meta/app?name=<app_name>功能： 获取某个表的基本信息。
参数：
示例：127.0.0.1:34601/meta/app?name=stat&detail
返回：
{ "general": { "app_id": "1", "app_name": "stat", "max_replica_count": "3", "partition_count": "4" }, "healthy": { "fully_healthy_partition_count": "0", "read_unhealthy_partition_count": "0", "unhealthy_partition_count": "4", "write_unhealthy_partition_count": "0" }, "nodes": { "127.0.0.1:34801": { "node": "127.0.0.1:34801", "primary": "2", "secondary": "2", "total": "4" }, "127.0.0.1:34802": { "node": "127.0.0.1:34802", "primary": "2", "secondary": "2", "total": "4" }, "total": { "node": "total", "primary": "4", "secondary": "4", "total": "8" } }, "replicas": { "0": { "ballot": "2", "pidx": "0", "primary": "127.0.0.1:34801", "replica_count": "2/3", "secondaries": "[127.0.0.1:34802]" }, "1": { "ballot": "2", "pidx": "1", "primary": "127.0.0.1:34802", "replica_count": "2/3", "secondaries": "[127.0.0.1:34801]" }, "2": { "ballot": "2", "pidx": "2", "primary": "127.0.0.1:34801", "replica_count": "2/3", "secondaries": "[127.0.0.1:34802]" }, "3": { "ballot": "2", "pidx": "3", "primary": "127.0.0.1:34802", "replica_count": "2/3", "secondaries": "[127.0.0.1:34801]" } } }
/meta/apps功能： 获取所有表的列表。
参数：
示例：127.0.0.1:34601/meta/apps?detail
返回：
{ "general_info": { "1": { "app_id": "1", "app_name": "stat", "app_type": "pegasus", "create_time": "2019-08-15 12:34:15.000", "drop_expire": "-", "drop_time": "-", "envs_count": "0", "is_stateful": "true", "partition_count": "4", "replica_count": "3", "status": "AVAILABLE" }, "2": { "app_id": "2", "app_name": "temp", "app_type": "pegasus", "create_time": "2019-08-15 12:34:15.000", "drop_expire": "-", "drop_time": "-", "envs_count": "0", "is_stateful": "true", "partition_count": "8", "replica_count": "3", "status": "AVAILABLE" } }, "healthy_info": { "1": { "app_id": "1", "app_name": "stat", "fully_healthy": "0", "partition_count": "4", "read_unhealthy": "0", "unhealthy": "4", "write_unhealthy": "4" }, "2": { "app_id": "2", "app_name": "temp", "fully_healthy": "0", "partition_count": "8", "read_unhealthy": "0", "unhealthy": "8", "write_unhealthy": "8" } }, "summary": { "fully_healthy_app_count": "0", "read_unhealthy_app_count": "0", "total_app_count": "2", "unhealthy_app_count": "2", "write_unhealthy_app_count": "2" } }
/meta/cluster功能： 获取集群基本信息。
示例：127.0.0.1:34601/meta/cluster
返回：
{ "balance_operation_count": "move_pri=0,copy_pri=0,copy_sec=0,total=0", "meta_function_level": "steady", "meta_servers": "127.0.0.1:34601,127.0.0.1:34602,127.0.0.1:34603", "primary_meta_server": "127.0.0.1:34601", "primary_replica_count_stddev": "0.00", "total_replica_count_stddev": "0.00", "zookeeper_hosts": "127.0.0.1:22181", "zookeeper_root": "/pegasus/onebox/127.0.0.1" }
/meta/nodes功能： 获取replica节点列表，以IP地址表示各个节点，并输出基本信息。
参数：
示例：127.0.0.1:34601/meta/nodes?detail
返回：
{ "details": { "127.0.0.1:34801": { "address": "127.0.0.1:34801", "primary_count": "6", "replica_count": "12", "secondary_count": "6", "status": "ALIVE" }, "127.0.0.1:34802": { "address": "127.0.0.1:34802", "primary_count": "6", "replica_count": "12", "secondary_count": "6", "status": "ALIVE" } }, "summary": { "alive_node_count": "2", "total_node_count": "2", "unalive_node_count": "0" } }
/meta/app_envs?name=<app_name>功能： 获取某个表的所有环境变量。
参数：
示例：127.0.0.1:34601/meta/app_envs?name=temp
返回：
{ "replica.enable_slow_query_log": "true", "replica.slow_query_threshold": "20" }