Merge pull request #6 from Intellection/overhaul

Perform an initial overhaul

Author: zacblazic

.gitignore

@@ -1,3 +1 @@
-passenger_exporter
-passenger_exporter_nginx
-passenger_exporter_nginx-*.tar.gz
+passenger-exporter

CHANGELOG.md

@@ -0,0 +1,16 @@
+# Changelog
+
+## 0.5.0
+
+### Improvements
+* Added home page with link to metrics.
+* Added new fields to output parsed from passenger status command.
+* Removed mentions of nginx as this exporter can support other integration modes.
+
+### Breaking Changes
+* Changed metrics prefix from `passenger_nginx` to `passenger`. This affects _all_ passenger metrics.
+* Renamed metrics:
+  * Changed `passenger_top_level_queue` to `passenger_top_level_request_queue`.
+  * Changed `passenger_app_queue` to `passenger_app_request_queue`.
+* Changed unit of passenger command timeout duration to seconds.
+* Removed deprecated `code_revision` field from output parsed from passenger status command.

CODEOWNERS

@@ -0,0 +1 @@
+* @itskingori @tsu-shiuan @zacblazic

Makefile

@@ -1,6 +1,6 @@
 VERSION   := $(shell cat VERSION)
-BIN       := passenger_exporter_nginx
-CONTAINER := passenger_exporter_nginx
+BIN       := passenger-exporter
+CONTAINER := passenger-exporter
 GOOS      ?= linux
 GOARCH    ?= amd64
 
@@ -23,4 +23,3 @@ build-docker: $(BIN)
 
 $(TAR): $(BIN)
 	tar czf $@ $<
-

README

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+# Passenger Exporter
+
+Prometheus exporter for [Phusion Passenger](https://www.phusionpassenger.com) metrics.
+
+## Flags
+
+```
+  -log.format value
+      If set use a syslog logger or JSON logging.
+      Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true.
+      Defaults to stderr.
+  -log.level value
+      Only log messages with the given severity or above.
+      Valid levels: [debug, info, warn, error, fatal]. (default info)
+  -passenger.command string
+      Passenger command for querying passenger status.
+      (default "passenger-status --show=xml")
+  -passenger.pid-file string
+    	Optional path to a file containing the passenger PID for additional metrics.
+  -passenger.command.timeout duration
+      Timeout for passenger.command. (default 500ms)
+  -web.listen-address string
+      Address to listen on for web interface and telemetry. (default ":9149")
+  -web.telemetry-path string
+      Path under which to expose metrics. (default "/metrics")
+```
+
+
+## Running Tests
+
+Tests can be run with:
+```
+go test .
+```
+
+Additionally, the test/scrape_output.txt can be regenerated by passing the
+`--golden` flag:
+```
+go test -v . --golden
+```