1 docker-compose安装
version: "3.4"
# https://docs.influxdata.com/influxdb/v1.7/administration/config
services:
influxdb:
image: influxdb:1.7-alpine
environment:
- INFLUXDB_ADMIN_ENABLED=true
- INFLUXDB_ADMIN_USER=${
INFLUXDB_ADMIN_USER:-root}
- INFLUXDB_ADMIN_PASSWORD=${
INFLUXDB_ADMIN_PASSWORD:-root}
- INFLUXDB_DB=test
- INFLUXDB_HTTP_LOG_ENABLED=false
- INFLUXDB_REPORTING_DISABLED=true
- INFLUXDB_USER=${
INFLUXDB_USER:-test}
- INFLUXDB_USER_PASSWORD=${
INFLUXDB_USER_PASSWORD:-test}
ports:
- "8083:8083"
- "8086:8086"
deploy:
mode: replicated
replicas: 1
resources:
limits:
memory: 2048M
reservations:
memory: 1024M
volumes:
- ./local_bind_volume_dir:/var/lib/influxdb
1.5 基本概念理解
https://www.cnblogs.com/yihuihui/p/11386679.html
2 基本操作
https://jasper-zhang1.gitbooks.io/influxdb/content/Guide/writing_data.html
插入一个值：
curl -i -X POST "http://localhost:8086/write?db=test" -u root:root --data-binary "cpu_load_short,host=server01,region=us-west value=0.64,value2=0.86 1434055562000000000"
> insert cpu_load_short,host=server02,region=de value=0.1,value2=0.2
从上面的输出，简单小结一下插入的语句写法:
insert + measurement + “,” + tag=value,tag=value + + field=value,field=value
- tag与tag之间用逗号分隔；field与field之间用逗号分隔
- tag与field之间用空格分隔
- tag都是string类型，不需要引号将value包裹
- field如果是string类型，需要加引号
查询该值：
> select * from cpu_load_short;
name: cpu_load_short
time host region value value2
---- ---- ------ ----- ------
1434055562000000000 server01 us-west 0.64 0.86
1637648158355267700 server02 de 0.1 0.2
4 代码操作:
注意写入的过程需要保证有field，不能全为tag，将很多raw插入：(以下划线开始的为filed，filed字段不会建立索引，故查询慢)
public void insert(String table, List<Map<String, Object>> rows) {
if (CollectionUtils.isEmpty(rows)) {
return;
}
List<Point> points = rows.stream()
.filter(e -> !CollectionUtils.isEmpty(e))
.map(e -> {
return to(table, e);
})
.collect(Collectors.toList());
if (CollectionUtils.isEmpty(points)) {
return;
}
BatchPoints batchPoints = BatchPoints.builder()
.points(points)
.build();
influxDB.write(batchPoints);
influxDB.flush();
}
/** to函数 **/
private Point to(String table, Map<String, Object> row) {
Point.Builder builder = Point.measurement(table).time(getTime(row), TimeUnit.MILLISECONDS);
row.remove("time");
row.forEach((k, v) -> {
if (v == null) {
return;
}
if (StringUtils.startsWith(k, "_")) {
String key = StringUtils.removeStart(k, "_");
if (v.getClass().getName().equals(boolean.class.getName())) {
builder.addField(key, (boolean) v);
} else if (v.getClass().getName().equals(short.class.getName())) {
builder.addField(key, (short) v);
} else if (v.getClass().getName().equals(int.class.getName())) {
builder.addField(key, (int) v);
} else if (v.getClass().getName().equals(long.class.getName())) {
builder.addField(key, (long) v);
} else if (v.getClass().getName().equals(float.class.getName())) {
builder.addField(key, (float) v);
} else if (v.getClass().getName().equals(double.class.getName())) {
builder.addField(key, (double) v);
} else if (v instanceof Boolean) {
builder.addField(key, (Boolean) v);
} else if (v instanceof Number) {
builder.addField(key, (Number) v);
} else if (v instanceof String) {
builder.addField(key, (String) v);
} else {
builder.addField(key, v.toString());
}
} else {
builder.tag(k, v.toString());
}
});
return builder.build();
}
/** build函数(influxdb官方维护) 将会检测是否含有field字段 **/
public Point build() {
Preconditions.checkNonEmptyString(this.measurement, "measurement");
Preconditions.checkPositiveNumber(this.fields.size(), "fields size"); // 此处需保证fields size 大于等于1
Point point = new Point();
point.setFields(this.fields);
point.setMeasurement(this.measurement);
if (this.time != null) {
point.setTime(this.time);
point.setPrecision(this.precision);
}
point.setTags(this.tags);
return point;
}