Merge pull request #28 from Xtigyro/feature/idempotent-kind-config

Idempotent KinD Config

local-cluster/create-cluster.sh

@@ -4,7 +4,8 @@ set -e
 LIGHT_GREEN='\033[1;32m'
 LIGHT_RED='\033[1;31m'
 NC='\033[0m' # No Color
-KIND_CFG="./kind-cfg.yaml" # base config file
+KIND_CFG="$(<./kind-base-config.yaml)" # base config file
+KIND_IN_USE_CFG="./kind-in-use-config.yaml"
 K8S_CLUSTERS="$(kind get clusters 2>/dev/null | tr '\n' ' ' | sed 's/[[:blank:]]*$//')"
 
 if [[ -z "$1" ]]; then
@@ -81,8 +82,8 @@ while [ $# -gt 0 ]; do
  ;;
  --purge|-p)
  purge_clusters
- if [[ -f "${KIND_CFG}.backup" ]]; then
- yes | mv "${KIND_CFG}.backup" "${KIND_CFG}"
+ if [[ -f "${KIND_IN_USE_CFG}" ]]; then
+ rm -rf "${KIND_IN_USE_CFG}"
  printf "\n${LIGHT_GREEN}Old temporary configuration - cleaned.${NC}.\n"
  else
  printf "\n${LIGHT_GREEN}No old temporary configuration${NC}.\n"
@@ -115,24 +116,26 @@ else
  KIND_WRKR_CFG=$'\n - role: worker\n image: kindest/node:v'"${K8S_VER}"$'\n extraMounts:\n - hostPath: /var/run/docker.sock\n containerPath: /var/run/docker.sock'
 fi
 
-# Adjust the kINd config
-cp "${KIND_CFG}"{,.backup}
+# Adjust KinD config
+## Calculate no. of nodes
 if [ "${NO_NODES}" == 1 ]; then
  NO_NODES_CREATE="$((${NO_NODES} - 1))"
 else
  NO_NODES_CREATE="${NO_NODES}"
 fi
-echo -e "${KIND_CTRL_CFG}" >> "${KIND_CFG}"
+## Create new KinD config
+KIND_CFG="${KIND_CFG}${KIND_CTRL_CFG}"
 for (( i=0; i<"${NO_NODES_CREATE}"; ++i));
  do
- echo -e "${KIND_WRKR_CFG}" >> "${KIND_CFG}"
+ KIND_CFG="${KIND_CFG}${KIND_WRKR_CFG}"
  done
+echo -e "${KIND_CFG}" > "${KIND_IN_USE_CFG}"
 
-# Create kINd cluster
-kind create cluster --config "${KIND_CFG}" --name kind-"${NO_NODES}"
+# Create KinD cluster
+kind create cluster --config "${KIND_IN_USE_CFG}" --name kind-"${NO_NODES}"
 
-# Revert the kINd config
-yes | mv "${KIND_CFG}.backup" "${KIND_CFG}"
+# Clean used KinD config
+rm -rf "${KIND_IN_USE_CFG}"
 
 # Deploy desired svc-s
 helmfile -f ./helmfile.yaml apply > /dev/null
@@ -150,7 +153,7 @@ if [[ ! -z "$COEFFICIENT_LABEL" ]]; then
  done
 fi
 
-# Taint the nodes with "NoExecute"
+# Taint nodes with "NoExecute"
 if [[ ! -z "$COEFFICIENT_TAINT" ]]; then
  NO_NODES_TAINTED="$(bc -l <<<"${#CLUSTER_WRKS[@]} * $COEFFICIENT_TAINT" | awk '{printf("%d\n",$1 - 0.5)}')"
  for ((i=1;i<="$NO_NODES_TAINTED";i++));