new flag to disable all default collectors (#1460)

* new flag to disable all default collectors

Signed-off-by: Paul Gier <pgier@redhat.com>

Co-authored-by: Ben Kochie <superq@gmail.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/node_exporter.go b/node_exporter.go
index 6e92cc3..88039bd 100644
--- a/node_exporter.go
+++ b/node_exporter.go
@@ -29,7 +29,7 @@ import (
         "github.com/prometheus/common/version"
         "github.com/prometheus/node_exporter/collector"
         "github.com/prometheus/node_exporter/https"
-        "gopkg.in/alecthomas/kingpin.v2"
+        kingpin "gopkg.in/alecthomas/kingpin.v2"
 )
 
 // handler wraps an unfiltered http.Handler but uses a filtered handler,
@@ -153,6 +153,10 @@ func main() {
                         "web.max-requests",
                         "Maximum number of parallel scrape requests. Use 0 to disable.",
                 ).Default("40").Int()
+                disableDefaultCollectors = kingpin.Flag(
+                        "collector.disable-defaults",
+                        "Set all collectors to disabled by default.",
+                ).Default("false").Bool()
                 configFile = kingpin.Flag(
                         "web.config",
                         "Path to config yaml file that can enable TLS or authentication.",
@@ -166,6 +170,9 @@ func main() {
         kingpin.Parse()
         logger := promlog.New(promlogConfig)
 
+        if *disableDefaultCollectors {
+                collector.DisableDefaultCollectors()
+        }
         level.Info(logger).Log("msg", "Starting node_exporter", "version", version.Info())
         level.Info(logger).Log("msg", "Build context", "build_context", version.BuildContext())