add command to create prometheus scrape config

abra.sh

@@ -9,3 +9,27 @@ export PROMTAIL_YML_VERSION=v1
 export LOKI_YML_VERSION=v1
 export PROMETHEUS_YML_VERSION=v1
 export ALERTMANAGER_CONFIG_VERSION=v1
+
+# creates a default prometheus scrape config for a given node
+add_node(){
+  name=$1
+  add_domain "$name" "$name:8082/metrics"
+  add_domain "$name" "node.monitoring.$name"
+  add_domain "$name" "cadvisor.monitoring.$name"
+  cat "/prometheus/scrape_configs/$name.yml"
+}
+
+# adds a domain to a scrape config or creates a new one
+add_domain(){
+  name=$1
+  domain=$2
+  if [ ! -d "/prometheus/scrape_configs/" ]; then
+    mkdir -p /prometheus/scrape_configs/
+  fi
+  cd /prometheus/scrape_configs/ || exit 1
+  if [ ! -f "$name.yml" ]; then
+    echo -e "- targets:\n  - '$domain'" > "$name.yml"
+  else
+    echo "  - '$domain'"  >> "$name.yml"
+  fi
+}