Move some common scripts from multinode-demo/ to scripts/

scripts/configure-metrics.sh

@@ -0,0 +1,45 @@
+# |source| this file
+#
+# The SOLANA_METRICS_CONFIG environment variable is formatted as a
+# comma-delimited list of parameters. All parameters are optional.
+#
+# Example:
+#   export SOLANA_METRICS_CONFIG="host=<metrics host>,db=<database name>,u=<username>,p=<password>"
+#
+configure_metrics() {
+  [[ -n $SOLANA_METRICS_CONFIG ]] || return 0
+
+  declare metrics_params
+  IFS=',' read -r -a metrics_params <<< "$SOLANA_METRICS_CONFIG"
+  for param in "${metrics_params[@]}"; do
+    IFS='=' read -r -a pair <<< "$param"
+    if [[ ${#pair[@]} != 2 ]]; then
+      echo Error: invalid metrics parameter: "$param" >&2
+    else
+      declare name="${pair[0]}"
+      declare value="${pair[1]}"
+      case "$name" in
+      host)
+        export INFLUX_HOST="$value"
+        echo INFLUX_HOST="$INFLUX_HOST" >&2
+        ;;
+      db)
+        export INFLUX_DATABASE="$value"
+        echo INFLUX_DATABASE="$INFLUX_DATABASE" >&2
+        ;;
+      u)
+        export INFLUX_USERNAME="$value"
+        echo INFLUX_USERNAME="$INFLUX_USERNAME" >&2
+        ;;
+      p)
+        export INFLUX_PASSWORD="$value"
+        echo INFLUX_PASSWORD="********" >&2
+        ;;
+      *)
+        echo Error: Unknown metrics parameter name: "$name" >&2
+        ;;
+      esac
+    fi
+  done
+}
+configure_metrics