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[Enhancement] Convert metric to Json format (#3635)

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Add a JSON format for existing metrics like this.
```
{
    "tags":
    {
        "metric":"thread_pool",
        "name":"thrift-server-pool",
        "type":"active_thread_num"
    },
    "unit":"number",
    "value":3
}
```
I add a new JsonMetricVisitor to handle the transformation.
It's not to modify existing PrometheusMetricVisitor and SimpleCoreMetricVisitor.
Also I add
1.  A unit item to indicate the metric better 
2. Cloning tablet statistics divided by database.
3. Use white space to replace newline in audit.log
This commit is contained in:
lichaoyong
2020-05-27 08:49:30 +08:00
committed by GitHub
parent 12c59ba889
commit 1cc78fe69b
43 changed files with 711 additions and 338 deletions
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4
be/src/runtime/client_cache.cpp
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@ -216,12 +216,12 @@ void ClientCacheHelper::init_metrics(MetricRegistry* metrics, const std::string&
// usage, but ensures that _metrics_enabled is published.
boost::lock_guard<boost::mutex> lock(_lock);
_used_clients.reset(new IntGauge());
_used_clients.reset(new IntGauge(MetricUnit::NUMBER));
metrics->register_metric("thrift_used_clients",
MetricLabels().add("name", key_prefix),
_used_clients.get());
_opened_clients.reset(new IntGauge());
_opened_clients.reset(new IntGauge(MetricUnit::NUMBER));
metrics->register_metric("thrift_opened_clients",
MetricLabels().add("name", key_prefix),
_opened_clients.get());