Generate report of Instrumentation Metrics

Generate a tab-seperated-value report of Prometheus metrics.
By default, assume CPS/NCMP is running on localhost:8887,
and output file named metrics-YYYY-MM-DDThh:mm:ss+00:00.tsv

Issue-ID: CPS-1488
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: I8bb356a1b6caacaec4a025a7d6d29cd34420e6c9

2 files changed, 112 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index a377967df..4f80c2b8a 100755
--- a/.gitignore
+++ b/.gitignore
@@ -31,4 +31,6 @@ tmp/
 /__pycache__/*
 
 /docs/docs/
-/docs/.vscode/
\ No newline at end of file
+/docs/.vscode/
+
+/metrics-reports/
diff --git a/generate-metrics-report.sh b/generate-metrics-report.sh
new file mode 100755
index 000000000..f1eac1471
--- /dev/null
+++ b/generate-metrics-report.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+#
+# Copyright 2023 Nordix Foundation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set -o errexit  # Exit on most errors
+set -o nounset  # Disallow expansion of unset variables
+set -o pipefail # Use last non-zero exit code in a pipeline
+#set -o xtrace   # Uncomment for debugging
+
+function script_usage() {
+  cat <<EOF
+Usage:
+     -h|--help              Displays this help
+     -u|--metrics-url=URL   URL to Prometheus metrics
+                            Default: http://localhost:8887/manage/prometheus
+     -o|--output=FILE       Path to output file
+                            Default: metrics-reports/metrics-[timestamp].tsv
+EOF
+}
+
+function parse_params() {
+  # Set parameter defaults
+  METRICS_URL="http://localhost:8887/manage/prometheus"
+  OUTFILE="metrics-reports/metrics-$(date --iso-8601=seconds).tsv"
+  TEMP_DIR="/tmp/cps-metrics"
+
+  # Parse parameters
+  local param
+  while [[ $# -gt 0 ]]; do
+    param="$1"
+    shift
+    case $param in
+    -h | --help)
+      script_usage
+      exit 0
+      ;;
+    -u | --metrics-url)
+      METRICS_URL=$1
+      shift
+      ;;
+    -o | --output)
+      OUTFILE=$1
+      shift
+      ;;
+    *)
+      echo "Invalid parameter was provided: $param" >&2
+      script_usage
+      exit 1
+      ;;
+    esac
+  done
+}
+
+function generate_report() {
+  # Create needed directories.
+  mkdir -p $TEMP_DIR "$(dirname "$OUTFILE")"
+
+  # Scrape raw metrics (suppress progress meter).
+  curl --fail --silent --show-error --output $TEMP_DIR/metrics-raw.txt "$METRICS_URL"
+
+  # Remove comments, sort by name, and separate by tabs.
+  grep --invert-match "^#" $TEMP_DIR/metrics-raw.txt | sort | sed 's/,[}]/}\t/' >$TEMP_DIR/metrics-all.txt
+
+  # Extract useful metrics.
+  grep -E "^cps_|^spring_data_" $TEMP_DIR/metrics-all.txt >$TEMP_DIR/metrics-cps.txt
+
+  # Extract into columns.
+  grep "_count" $TEMP_DIR/metrics-cps.txt | sed 's/_count//' | cut -f 1 >$TEMP_DIR/column1.txt
+  grep "_count" $TEMP_DIR/metrics-cps.txt | cut -f 2 >$TEMP_DIR/column2.txt
+  grep "_sum"   $TEMP_DIR/metrics-cps.txt | cut -f 2 >$TEMP_DIR/column3.txt
+  grep "_max"   $TEMP_DIR/metrics-cps.txt | cut -f 2 >$TEMP_DIR/column4.txt
+
+  # Combine columns into report.
+  paste $TEMP_DIR/column{1,2,3,4}.txt >$TEMP_DIR/report.txt
+
+  # Sort by Sum (column 3), descending.
+  sort --general-numeric-sort --reverse --field-separator=$'\t' --key=3 $TEMP_DIR/report.txt >$TEMP_DIR/report-sorted.txt
+
+  # Compile final report, with column headers.
+  echo -e "Method\tCount\tSum\tMax" >"$OUTFILE"
+  cat $TEMP_DIR/report-sorted.txt >>"$OUTFILE"
+
+  # Output path to generated file
+  echo "$OUTFILE"
+}
+
+function cleanup() {
+  rm -f $TEMP_DIR/* && rmdir $TEMP_DIR 2>/dev/null
+}
+# Set up the cleanup function to be triggered upon script exit
+trap cleanup EXIT
+
+# Main script logic
+parse_params "$@"
+generate_report
+exit 0