数据导入导出管理
eKuiper REST api 允许您导入导出数据。
数据格式
导入导出数据的文件格式为 JSON,包含流 stream
,表 table
,规则 rule
,插件 plugin
,源配置 source yaml
等。每种类型保存名字和创建语句的键值对。在以下示例文件中,我们定义了流、规则、表、插件、源配置、目标动作配置。
json
{
"streams": {
"demo": "CREATE STREAM demo () WITH (DATASOURCE=\"users\", FORMAT=\"JSON\")"
},
"tables": {
"T110":"\n CREATE TABLE T110\n (\n S1 string\n )\n WITH (DATASOURCE=\"test.json\", FORMAT=\"json\", TYPE=\"file\", KIND=\"scan\", );\n "
},
"rules": {
"rule1": "{\"id\": \"rule1\",\"sql\": \"SELECT * FROM demo\",\"actions\": [{\"log\": {}}]}",
"rule2": "{\"id\": \"rule2\",\"sql\": \"SELECT * FROM demo\",\"actions\": [{ \"log\": {}}]}"
},
"nativePlugins":{
"functions_image":"{\"name\":\"image\",\"file\":\"https://packages.emqx.net/kuiper-plugins/1.8.1/debian/functions/image_amd64.zip\",\"shellParas\":[]}",
"sources_video":"{\"name\":\"video\",\"file\":\"https://packages.emqx.net/kuiper-plugins/1.8.1/debian/sources/video_amd64.zip\",\"shellParas\":[]}",
},
"portablePlugins":{
},
"sourceConfig":{
"mqtt":"{\"td\":{\"insecureSkipVerify\":false,\"password\":\"public\",\"protocolVersion\":\"3.1.1\",\"qos\":1,\"server\":\"tcp://broker.emqx.io:1883\",\"username\":\"admin\"},\"test\":{\"insecureSkipVerify\":false,\"password\":\"public\",\"protocolVersion\":\"3.1.1\",\"qos\":1,\"server\":\"tcp://127.0.0.1:1883\",\"username\":\"admin\"}}"
},
"sinkConfig":{
"edgex":"{\"test\":{\"bufferLength\":1024,\"contentType\":\"application/json\",\"enableCache\":false,\"format\":\"json\",\"messageType\":\"event\",\"omitIfEmpty\":false,\"port\":6379,\"protocol\":\"redis\",\"sendSingle\":true,\"server\":\"localhost\",\"topic\":\"application\",\"type\":\"redis\"}}"
},
"connectionConfig":{
},
"Service":{
},
"Schema":{
},
"uploads":{
},
"scripts":{
"area":"{\"id\":\"area\",\"description\":\"calculate area\",\"script\":\"function area(x, y) { return x * y; }\",\"isAgg\":false}"
}
}
导入数据
该 API 接受数据并将其导入系统中,支持通过文本内容或者文件 URI 的方式指定数据。 默认情况下若已有历史遗留数据,则首先清除旧有数据然后导入,用户可通过在 HTTP URL 中指定 partial=1
参数,使其直接导入,不再清除旧有数据。
示例1:通过文本内容导入
shell
POST http://{{host}}/data/import
Content-Type: application/json
{
"content": "$数据 json 内容"
}
示例2:通过文件 URI 导入
shell
POST http://{{host}}/data/import
Content-Type: application/json
{
"file": "file:///tmp/a.json"
}
示例3:通过文件 URI 导入数据并退出 (用于插件和静态模式更新,用户需保证 eKuiper 退出后能重新启动)
shell
POST http://{{host}}/data/import?stop=1
Content-Type: application/json
{
"file": "file:///tmp/a.json"
}
示例4: 导入新数据但是不清除旧有数据 (覆盖 tables/streams/rules/source config/sink 相关数据. 如果 plugins/schema 在系统中不存在, 那么安装,否则忽略相关配置)
shell
POST http://{{host}}/data/import?partial=1
Content-Type: application/json
{
"file": "file:///tmp/a.json"
}
导入数据状态查询
该 API 返回数据导入出错情况,如所有返回为空,则代表导入完全成功。
shell
GET http://{{host}}/data/import/status
示例1:导入数据完全成功
shell
GET http://{{host}}/data/import/status
Content-Type: application/json
{
"streams":{},
"tables":{},
"rules":{},
"nativePlugins":{},
"portablePlugins":{},
"sourceConfig":{},
"sinkConfig":{},
"connectionConfig":{},
"Service":{},
"Schema":{},
"uploads":{},
"scripts":{}
}
示例2:导入插件失败
shell
GET http://{{host}}/data/import/status
Content-Type: application/json
{
"streams":{},
"tables":{},
"rules":{},
"nativePlugins":{
"sinks_tdengine":"fail to download file file:///root/ekuiper-jran/_plugins/ubuntu/sinks/tdengine_amd64.zip: stat /root/ekuiper-jran/_plugins/ubuntu/sinks/tdengine_amd64.zip: no such file or directory",
"sources_random":"fail to download file file:///root/ekuiper-jran/_plugins/ubuntu/sources/random_amd64.zip: stat /root/ekuiper-jran/_plugins/ubuntu/sources/random_amd64.zip: no such file or directory"},
"portablePlugins":{},
"sourceConfig":{},
"sinkConfig":{},
"connectionConfig":{},
"Service":{},
"Schema":{},
"uploads":{},
"scripts":{}
}
导出数据
导出 API 返回二进制流,在浏览器使用时,可选择下载保存的文件路径。
示例1:导出所有数据
shell
GET http://{{host}}/data/export
示例2:导出特定规则的数据
shell
POST -d '["rule1","rule2"]' http://{{host}}/data/export