[CI] Only set vm.max_map_count if in Buildkite

Author: picandocodigo

.buildkite/run-elasticsearch.sh

@@ -29,8 +29,12 @@ set -euo pipefail
 echo -e "\033[34;1mINFO:\033[0m Take down node if called twice with the same arguments (DETACH=true) or on seperate terminals \033[0m"
 cleanup_node $es_node_name
 
-# Set vm.max_map_count kernel setting to 262144
-sudo sysctl -w vm.max_map_count=262144
+BUILDKITE=${BUILDKITE-false}
+
+# Set vm.max_map_count kernel setting to 262144 if we're in CI
+if [[ "$BUILDKITE" == "true" ]]; then
+  sudo sysctl -w vm.max_map_count=262144
+fi
 
 master_node_name=${es_node_name}
 cluster_name=${moniker}${suffix}