telegraf/plugins/processors/converter/README.md

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# Converter Processor
The converter processor is used to change the type of tag or field values. In
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addition to changing field types it can convert between fields and tags.
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Values that cannot be converted are dropped.
**Note:** When converting tags to fields, take care to ensure the series is still
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uniquely identifiable. Fields with the same series key (measurement + tags)
will overwrite one another.
### Configuration:
```toml
# Convert values to another metric value type
[[processors.converter]]
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## Tags to convert
##
## The table key determines the target type, and the array of key-values
## select the keys to convert. The array may contain globs.
## <target-type> = [<tag-key>...]
[processors.converter.tags]
string = []
integer = []
unsigned = []
boolean = []
float = []
## Fields to convert
##
## The table key determines the target type, and the array of key-values
## select the keys to convert. The array may contain globs.
## <target-type> = [<field-key>...]
[processors.converter.fields]
tag = []
string = []
integer = []
unsigned = []
boolean = []
float = []
```
### Examples:
```toml
[[processors.converter]]
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[processors.converter.tags]
string = ["port"]
[processors.converter.fields]
integer = ["scboard_*"]
tag = ["ParseServerConfigGeneration"]
```
```diff
- apache,port=80,server=debian-stretch-apache BusyWorkers=1,BytesPerReq=0,BytesPerSec=0,CPUChildrenSystem=0,CPUChildrenUser=0,CPULoad=0.00995025,CPUSystem=0.01,CPUUser=0.01,ConnsAsyncClosing=0,ConnsAsyncKeepAlive=0,ConnsAsyncWriting=0,ConnsTotal=0,IdleWorkers=49,Load1=0.01,Load15=0,Load5=0,ParentServerConfigGeneration=3,ParentServerMPMGeneration=2,ReqPerSec=0.00497512,ServerUptimeSeconds=201,TotalAccesses=1,TotalkBytes=0,Uptime=201,scboard_closing=0,scboard_dnslookup=0,scboard_finishing=0,scboard_idle_cleanup=0,scboard_keepalive=0,scboard_logging=0,scboard_open=100,scboard_reading=0,scboard_sending=1,scboard_starting=0,scboard_waiting=49 1502489900000000000
+ apache,server=debian-stretch-apache,ParentServerConfigGeneration=3 port="80",BusyWorkers=1,BytesPerReq=0,BytesPerSec=0,CPUChildrenSystem=0,CPUChildrenUser=0,CPULoad=0.00995025,CPUSystem=0.01,CPUUser=0.01,ConnsAsyncClosing=0,ConnsAsyncKeepAlive=0,ConnsAsyncWriting=0,ConnsTotal=0,IdleWorkers=49,Load1=0.01,Load15=0,Load5=0,ParentServerMPMGeneration=2,ReqPerSec=0.00497512,ServerUptimeSeconds=201,TotalAccesses=1,TotalkBytes=0,Uptime=201,scboard_closing=0i,scboard_dnslookup=0i,scboard_finishing=0i,scboard_idle_cleanup=0i,scboard_keepalive=0i,scboard_logging=0i,scboard_open=100i,scboard_reading=0i,scboard_sending=1i,scboard_starting=0i,scboard_waiting=49i 1502489900000000000
```