Add successful timestamp to metrics script and fix num of lines at th…

…e beginning of README (#316)

README.md

@@ -287,9 +287,9 @@ Table of exported metrics:
 | logstash_info_status | counter | A metric with a constant '1' value labeled by status. |
 | logstash_info_up | counter | A metric that returns 1 if the node is up, 0 otherwise. |
 | logstash_stats_events_duration_millis | gauge | Duration of events processing in milliseconds. |
-| logstash_stats_events_filtered | counter | Number of events filtered out. |
-| logstash_stats_events_in | counter | Number of events received. |
-| logstash_stats_events_out | counter | Number of events out. |
+| logstash_stats_events_filtered | gauge | Number of events filtered out. |
+| logstash_stats_events_in | gauge | Number of events received. |
+| logstash_stats_events_out | gauge | Number of events out. |
 | logstash_stats_events_queue_push_duration_millis | gauge | Duration of events push to queue in milliseconds. |
 | logstash_stats_flow_filter_current | gauge | Current number of events in the filter queue. |
 | logstash_stats_flow_filter_lifetime | counter | Lifetime number of events in the filter queue. |
@@ -345,9 +345,9 @@ Table of exported metrics:
 | logstash_stats_pipeline_queue_events_queue_size | gauge | Number of events that the queue can accommodate |
 | logstash_stats_pipeline_queue_max_size_in_bytes | gauge | Maximum size of given queue in bytes. |
 | logstash_stats_pipeline_reloads_failures | counter | Number of failed pipeline reloads. |
-| logstash_stats_pipeline_reloads_successes | counter | Number of successful pipeline reloads. |
 | logstash_stats_pipeline_reloads_last_failure_timestamp | gauge | Timestamp of last failed pipeline reload. |
 | logstash_stats_pipeline_reloads_last_success_timestamp | gauge | Timestamp of last successful pipeline reload. |
+| logstash_stats_pipeline_reloads_successes | counter | Number of successful pipeline reloads. |
 | logstash_stats_pipeline_up | gauge | Whether the pipeline is up or not. |
 | logstash_stats_process_cpu_load_average_1m | gauge | Total 1m system load average. |
 | logstash_stats_process_cpu_load_average_5m | gauge | Total 5m system load average. |

scripts/add_metrics_to_readme.sh

@@ -9,7 +9,7 @@ function getMetrics() {
     done
 }
 
-function failureConfigChange() {
+function configChangeReload() {
 	local logstashCID
 	logstashCID=$( docker ps -a | grep 'logstash-exporter-logstash-1' | awk '{print $1}' )
 	local logstashConf
@@ -18,26 +18,50 @@ function failureConfigChange() {
 	local logstashPID
 	logstashPID=1
 
+	# *** create failing config ***
+
 	docker exec -it "$logstashCID" sh -c "echo 'Wrong Config' >> $logstashConf"
 
 	# reload logstash
 	docker exec -it "$logstashCID" sh -c "kill -1 $logstashPID"
 
-	# bring back previous config 
+	# backup original config 
 	# walk around with 'cp' to avoid replacing config inside container
 	docker exec "$logstashCID" sh -c "sed '\$d' $logstashConf > /tmp/prev_logstash.conf" 
 	docker exec "$logstashCID" sh -c "cp /tmp/prev_logstash.conf $logstashConf"
 
 	# reload logstash
 	docker exec -it "$logstashCID" sh -c "kill -1 $logstashPID"
 
+	# *****************************
+
+	# *** create successful config ***
+
+	# delete lines of 'generator' config
+	docker exec "$logstashCID" sh -c "sed '2,7d' $logstashConf > /tmp/new_logstash.conf"
+	docker exec "$logstashCID" sh -c "cp /tmp/new_logstash.conf $logstashConf"
+
+	# reload logstash
+	docker exec -it "$logstashCID" sh -c "kill -1 $logstashPID"
+
+	# restore backup
+	docker exec "$logstashCID" sh -c "cp /tmp/prev_logstash.conf $logstashConf"
+
+	# reload logstash
+	docker exec -it "$logstashCID" sh -c "kill -1 $logstashPID"
+
+	# ********************************
+
 }
 
-failureConfigChange
+configChangeReload
 
 FILE=README.md
 while IFS= read -r line; do LINES+=("$line"); done < $FILE
 
+# remove number of lines from the beginning
+LINES=("${LINES[@]:1}")
+
 startLine=$(grep -n "^<!-- METRICS_TABLE_START -->" $FILE | awk -F: '{print $1}')
 endLine=$(grep -n "^<!-- METRICS_TABLE_END -->" $FILE | awk -F: '{print $1}')