feat: add initial

docker/frontend-mem-nag.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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 -e
+
+# We need at least 3GB of free mem...
+MIN_MEM_FREE_GB=3
+MIN_MEM_FREE_KB=$(($MIN_MEM_FREE_GB*1000000))
+
+echo_mem_warn() {
+  MEM_FREE_KB=$(awk '/MemFree/ { printf "%s \n", $2 }' /proc/meminfo)
+  MEM_FREE_GB=$(awk '/MemFree/ { printf "%s \n", $2/1024/1024 }' /proc/meminfo)
+
+  if [[ "${MEM_FREE_KB}" -lt "${MIN_MEM_FREE_KB}" ]]; then
+    cat <<EOF
+    ===============================================
+    ========  Memory Insufficient Warning =========
+    ===============================================
+
+    It looks like you only have ${MEM_FREE_GB}GB of
+    memory free. Please increase your Docker
+    resources to at least ${MIN_MEM_FREE_GB}GB
+
+    ===============================================
+    ========  Memory Insufficient Warning =========
+    ===============================================
+EOF
+  else
+    echo "Memory check Ok [${MEM_FREE_GB}GB free]"
+  fi
+}
+
+# Always nag if they're low on mem...
+echo_mem_warn