adding memcached_check

shell/memcached_check.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+#
+# SPDX-License-Identifier: MIT
+
+MC_IP=127.0.0.1
+MC_PORT=11211
+MC_LOG=/var/log/memcached_stats.log
+
+DTS=$(date -R)
+
+/usr/bin/nc -w 5 -i 1 "$MC_IP $MC_PORT" << EOF | grep -q ^END
+stats
+quit
+EOF
+
+# shellcheck disable=SC2181
+if [ $? -eq 0 ]; then
+  echo "[$DTS] OK" >> "$MC_LOG"
+else
+  echo "[$DTS] FAILED" >> "$MC_LOG"
+fi
+
+exit 0