Script to diff metrics reports

- Added Python script to subtract metrics reports
- Moved scripts to test-tools/ folder

Issue-ID: CPS-1551
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: I4547eb523135dfc0441b5d47ab7f81b184bf836a

2 files changed, 189 insertions, 0 deletions

diff --git a/test-tools/generate-metrics-report.sh b/test-tools/generate-metrics-report.sh
new file mode 100755
index 000000000..f1eac1471
--- /dev/null
+++ b/test-tools/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
diff --git a/test-tools/subtract-metrics-reports.py b/test-tools/subtract-metrics-reports.py
new file mode 100755
index 000000000..8f6fab384
--- /dev/null
+++ b/test-tools/subtract-metrics-reports.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# 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.
+#
+
+import argparse
+import csv
+
+
+def load_metrics_table(filename):
+    with open(filename) as tsvFile:
+        csvreader = csv.DictReader(tsvFile, dialect="excel-tab")
+        table = {}
+        for source_row in csvreader:
+            method, count, sum_time = source_row['Method'], source_row['Count'], source_row['Sum']
+            table[method] = { 'Count': int(float(count)), 'Sum': float(sum_time) }
+    return table
+
+
+def save_metrics_table(table, filename):
+    with open(filename, 'w', newline='') as outfile:
+        csvwriter = csv.writer(outfile, dialect="excel-tab")
+        csvwriter.writerow(["Method", "Count", "Sum"])
+        for method in table:
+            count, sum_time = table[method]['Count'], table[method]['Sum']
+            csvwriter.writerow([method, count, sum_time])
+
+
+def subtract_metrics_tables(table, table_to_subtract):
+    result = {}
+    for method in table:
+        result[method] = table[method]
+    for method in table_to_subtract:
+        result[method]['Count'] = result[method]['Count'] - table_to_subtract[method]['Count']
+        result[method]['Sum'] = result[method]['Sum'] - table_to_subtract[method]['Sum']
+    return filter_null_metrics_from_metrics_table(result)
+
+
+def filter_null_metrics_from_metrics_table(table):
+    result = {}
+    for method in table:
+        if table[method]['Count'] > 0:
+            result[method] = table[method]
+    return result
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-a', '--metrics-after',
+                        required=True,
+                        help='path to metrics table to subtract from',
+                        dest='tsvpath_after',
+                        type=str)
+    parser.add_argument('-b', '--metrics-before',
+                        required=True,
+                        help='path to metrics table to subtract',
+                        dest='tsvpath_before',
+                        type=str)
+    parser.add_argument('-o', '--output',
+                        required=True,
+                        help='path to output metrics table',
+                        dest='outpath',
+                        type=str)
+    args = parser.parse_args()
+    table1 = load_metrics_table(args.tsvpath_before)
+    table2 = load_metrics_table(args.tsvpath_after)
+    table_diff = subtract_metrics_tables(table2, table1)
+    save_metrics_table(table_diff, args.outpath)