Pegasus为MetaServer，ReplicaServer和Collector都提供了HTTP接口，用于查看集群相关信息，查询服务状态等。
注意
127.0.0.1:34601 和 127.0.0.1:34602 分别是主备MetaServer，访问 127.0.0.1:34602/meta/cluster 会自动跳转到 127.0.0.1:34601/meta/cluster。所有接口均返回JSON格式。使用浏览器查看JSON时，建议使用Chrome插件json-formatter以优化阅读体验。
/功能： 主页面，获取所有接口的使用帮助
示例：127.0.0.1:34801
返回：
{ "/": "ip:port/", "/meta/app": "ip:port/meta/app?app_name=temp", "/meta/app/duplication": "ip:port/meta/app/duplication?name=<app_name>", "/meta/app_envs": "ip:port/meta/app_envs?name=temp", "/meta/apps": "ip:port/meta/apps", "/meta/backup_policy": "ip:port/meta/backup_policy", "/meta/cluster": "ip:port/meta/cluster", "/meta/nodes": "ip:port/meta/nodes", "/perfCounter": "ip:port/perfCounter?name={perf_counter_name}", "/pprof/cmdline": "ip:port/pprof/cmdline", "/pprof/growth": "ip:port/pprof/growth", "/pprof/heap": "ip:port/pprof/heap", "/pprof/profile": "ip:port/pprof/profile", "/pprof/symbol": "ip:port/pprof/symbol", "/recentStartTime": "ip:port/recentStartTime", "/version": "ip:port/version" }
/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" }
/meta/app/duplication?name=<app_name>功能： 查询某个表的热备份情况
添加自：版本 2.0.0
参数：
示例：http://0.0.0.0:34602/meta/app/duplication?name=temp
返回：
create_ts：热备份的创建时间dupid：热备份的IDnot_confirmed_mutations_num：各个分片当前有多少数据写尚未复制到目的集群，并且进度被同步至MetaServerremote：热备份远端集群的名字status：当前热备份的状态{ "1": { "create_ts": "2020-03-09 18:13:50", "dupid": 1583748830, "not_confirmed_mutations_num": { "0": 4964, "1": 5144, "2": 5123, "3": 5148, "4": 5208, "5": 5289, "6": 5253, "7": 5148 }, "remote": "onebox2", "status": "DS_PAUSE" }, "appid": 2 }
/perfCounter?name=<perf_counter_name>功能： 获取某个perf counter的详细信息。如果perf counter名字中含有特殊字符时，需要先对其进行uri编码。
参数：
示例：127.0.0.1:34101/perfCounter?name=collector*app.pegasus*app.stat.read_qps%23_all_
返回：
{ "name": "collector*app.pegasus*app.stat.read_qps#_all_", "value": "0.00", "type": "NUMBER", "description": "statistic the read_qps of app _all_" }
NOTE: http中的字符#代表锚，是一种特殊字符，所以对于perf counter名字中包含'#'字符的需要转换成%23
/replica/duplication?appid=<appid>功能： 查询ReplicaServer上某个表各个分片的热备份情况。
添加自：版本 2.0.0
参数：
示例：http://127.0.0.1:34801/replica/duplication?appid=2
返回：
duplicating：表示该分片是否正在运行热备份not_confirmed_mutations_num：当前有多少数据写尚未复制到目的集群，并且进度被同步至MetaServernot_duplicated_mutations_num：当前有多少数据写尚未复制到目的集群NOTE:：not_duplicated_mutations_num >= not_confirmed_mutations_num
{ "1583820008": { "2.1": { "duplicating": true, "not_confirmed_mutations_num": 3, "not_duplicated_mutations_num": 3 }, "2.3": { "duplicating": true, "not_confirmed_mutations_num": 2, "not_duplicated_mutations_num": 1 }, "2.4": { "duplicating": true, "not_confirmed_mutations_num": 2, "not_duplicated_mutations_num": 2 }, "2.7": { "duplicating": true, "not_confirmed_mutations_num": 3, "not_duplicated_mutations_num": 2 } } }