本节用HTTP方式读写InfluxDB数据。
1、InfluxDB API路径
| Endpoint | Description |
| /debug/pprof | Generate profiles for troubleshooting |
| /debug/requests | Track HTTP client requests to the /write and /query endpoints |
| /debug/vars | Collect internal InfluxDB statistics |
| /ping | Check the status of your InfluxDB instance and your version of InfluxDB |
| /query | Query data using InfluxQL, manage databases, retention policies, and users |
| /write | Write data to a database |
2、ping服务状态
curl -i 'http://localhost:8086/ping' HTTP/1.1 204 No Content Content-Type: application/json Request-Id: ff6febe5-bb85-11ea-8060-fa163e4dc996 X-Influxdb-Build: OSS X-Influxdb-Version: 1.8.0 X-Request-Id: ff6febe5-bb85-11ea-8060-fa163e4dc996 Date: Wed, 01 Jul 2020 10:31:17 GMT
3、查看并新建数据库
curl -i -XPOST http://localhost:8086/query --data-urlencode "q=show databases"
HTTP/1.1 200 OK
Content-Type: application/json
Request-Id: 4eddc157-bb86-11ea-8061-fa163e4dc996
X-Influxdb-Build: OSS
X-Influxdb-Version: 1.8.0
X-Request-Id: 4eddc157-bb86-11ea-8061-fa163e4dc996
Date: Wed, 01 Jul 2020 10:33:31 GMT
Transfer-Encoding: chunked
{"results":[{"statement_id":0,"series":[{"name":"databases","columns":["name"],"values":[["_internal"],["NOAA_water_database"]]}]}]}
curl -i -XPOST http://localhost:8086/query --data-urlencode "q=CREATE DATABASE mydb"
HTTP/1.1 200 OK
Content-Type: application/json
Request-Id: 05a455eb-bb89-11ea-8062-fa163e4dc996
X-Influxdb-Build: OSS
X-Influxdb-Version: 1.8.0
X-Request-Id: 05a455eb-bb89-11ea-8062-fa163e4dc996
Date: Wed, 01 Jul 2020 10:52:56 GMT
Transfer-Encoding: chunked
{"results":[{"statement_id":0}]}
4、写入数据
curl -i -XPOST 'http://localhost:8086/write?db=mydb' --data-binary 'cpu_load_short,host=server01,region=us-west value=0.64 1422568543700000000' HTTP/1.1 204 No Content Content-Type: application/json Request-Id: 171405ad-bb8a-11ea-8063-fa163e4dc996 X-Influxdb-Build: OSS X-Influxdb-Version: 1.8.0 X-Request-Id: 171405ad-bb8a-11ea-8063-fa163e4dc996 Date: Wed, 01 Jul 2020 11:00:35 GMT curl -i -XPOST 'http://localhost:8086/write?db=mydb' --data-binary 'cpu_load_short,host=server02,region=asia-east value=0.67 1422568543700000000 > cpu_load_short,host=server02,region=us-west value=0.55 1422568543900000000 > cpu_load_short,host=server01,region=asia-east value=2.0 1422568543900000000' HTTP/1.1 204 No Content Content-Type: application/json Request-Id: 1ad799eb-bb8a-11ea-8064-fa163e4dc996 X-Influxdb-Build: OSS X-Influxdb-Version: 1.8.0 X-Request-Id: 1ad799eb-bb8a-11ea-8064-fa163e4dc996 Date: Wed, 01 Jul 2020 11:00:41 GMT
5、查询数据
# curl双引号里面支持转义符、支持变量
# curl单引号里面不支持转义符、不支持变量
curl -i -XPOST 'http://localhost:8086/query?pretty=true&db=mydb' --data-binary "q=select * from cpu_load_short where \"region\"='us-west'"
HTTP/1.1 200 OK
Content-Type: application/json
Request-Id: d976bd19-bb8c-11ea-8076-fa163e4dc996
X-Influxdb-Build: OSS
X-Influxdb-Version: 1.8.0
X-Request-Id: d976bd19-bb8c-11ea-8076-fa163e4dc996
Date: Wed, 01 Jul 2020 11:20:20 GMT
Transfer-Encoding: chunked
{
"results": [
{
"statement_id": 0,
"series": [
{
"name": "cpu_load_short",
"columns": [
"time",
"host",
"region",
"value"
],
"values": [
[
"2015-01-29T21:55:43.7Z",
"server01",
"us-west",
0.64
],
[
"2015-01-29T21:55:43.9Z",
"server02",
"us-west",
0.55
]
]
}
]
}
]
}