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authorLucjan Bryndza <l.bryndza@samsung.com>2020-03-31 10:28:03 +0200
committerLucjan Bryndza <l.bryndza@samsung.com>2020-03-31 10:29:27 +0200
commitddf2e3a3c1951f993df493c75d2f02e4ac43097c (patch)
treec2f7b68597add7bd0e04b957f0e40fd6eb10aed9
parentc6529f99090b997b4e8a4083c990eb4e4b022bb7 (diff)
MetalLB install script for bare metal cluster
If Ingress controller is exposed via NodePort it listens on non standard port, so it can be quite problematic. Exposing via LoadBalancer doesn't work properly on bare metal Kubernetes cluster, so external LB solution is needed. Signed-off-by: Lucjan Bryndza <l.bryndza@samsung.com> Change-Id: I9a2032e8501caca7c3a564f6bbcf969fdde31da2 Issue-ID: OOM-2346
-rwxr-xr-xkubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh85
1 files changed, 85 insertions, 0 deletions
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
index 0000000000..6e412a3688
--- /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