updates from review, WIP

build/docker/datadog-agent/custom-init.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+configFile="/etc/datadog-agent/conf.d/go_expvar.d/conf.yaml"
+
+echo -e "init_config:\n\ninstances:\n" > $configFile
+
+if [[ "${DD_EXPVAR}" != "" ]]; then
+
+     while IFS='|' read -ra HOSTS; do
+        for h in "${HOSTS[@]}"; do
+            if [[ "${h}" == "" ]]; then
+                continue
+            fi
+
+            url=""
+            for p in $h; do
+                k=`echo $p | awk -F '=' '{print $1}'`
+                v=`echo $p | awk -F '=' '{print $2}'`
+                if [[ "${k}" == "url" ]]; then
+                    url=$v
+                    break
+                fi
+            done
+
+            if [[ "${url}" == "" ]]; then
+                echo "No url param found in '${h}'"
+                continue
+            fi
+
+            echo -e "  - expvar_url: ${url}" >> $configFile
+            if [[ "${DD_TAGS}" != "" ]]; then
+                echo "    tags:" >> $configFile
+                for t in ${DD_TAGS}; do
+                    echo "      - ${t}" >> $configFile
+                done
+            fi
+
+            for p in $h; do
+                k=`echo $p | awk -F '=' '{print $1}'`
+                v=`echo $p | awk -F '=' '{print $2}'`
+                if [[ "${k}" == "url" ]]; then
+                    continue
+                fi
+                echo "      - ${k}:${v}" >> $configFile
+            done
+        done
+     done <<< "$DD_EXPVAR"
+else :
+    echo -e "  - expvar_url: http://localhost:80/debug/vars" >> $configFile
+    if [[ "${DD_TAGS}" != "" ]]; then
+        echo "    tags:" >> $configFile
+        for t in ${DD_TAGS}; do
+            echo "      - ${t}" >> $configFile
+        done
+    fi
+fi
+
+cat $configFile
+
+/init