Merge "MetalLB install script for bare metal cluster"

diff --git a/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
new file mode 100755 (executable)
index 0000000..6e412a3
--- /dev/null
+++ b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
@@ -0,0 +1,85 @@
+#!/bin/bash -e
+#
+#   Copyright 2020 Samsung Electronics Co., Ltd.
+#
+#   Licensed 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.
+#
+
+usage() {
+cat << ==usage
+$0 Automatic configuration using external addresess from nodes
+$0 --help This message
+$0 -h This message
+$0 [cluster_ip1] ... [cluster_ipn]  Cluster address or ip ranges
+==usage
+}
+
+
+find_nodes_with_external_addrs()
+{
+       local WORKER_NODES=$(kubectl get no -l node-role.kubernetes.io/worker=true -o jsonpath='{.items..metadata.name}')
+       for worker in $WORKER_NODES; do
+               local external_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/external-ip }')
+               local internal_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/internal-ip }')
+               if [ $internal_ip != $external_ip ]; then
+                       echo $external_ip
+               fi
+       done
+}
+
+generate_config_map()
+{
+cat <<CNFEOF | kubectl apply -f -
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  namespace: metallb-system
+  name: config
+data:
+  config: |
+    address-pools:
+    - name: default
+      protocol: layer2
+      addresses:
+$(for value in "$@"; do echo -e "      - $value"; done)
+CNFEOF
+}
+
+generate_config_from_single_addr() {
+       generate_config_map "$1 - $1"
+}
+
+install_metallb() {
+       kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/namespace.yaml
+       kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/metallb.yaml
+       # Only when install
+       kubectl create secret generic -n metallb-system memberlist --from-literal=secretkey="$(openssl rand -base64 128)"
+}
+
+automatic_configuration() {
+       install_metallb
+       generate_config_from_single_addr $(find_nodes_with_external_addrs)
+}
+
+manual_configuration() {
+       install_metallb
+       generate_config_map $@
+}
+
+if [[ $# -eq 1 ]] && [[ $1 == "-h" || $1 == "--help" ]]; then
+       usage
+elif [[ $# -eq 0 ]]; then
+       automatic_configuration
+else
+       manual_configuration $@
+fi