Kubernetes MetalLB導入 Helm版

Helm版

https://github.com/bitnami/charts/tree/master/bitnami/metallb/
https://metallb.universe.tf/configuration/
https://note.classact.co.jp/user/honma-h/%E3%83%A1%E3%83%A2/2020/05/10/Kubernetes%E3%81%A7MetalLB%EF%BC%88LoadBalancer%EF%BC%89%E3%82%92%E6%A7%8B%E7%AF%89
https://metallb.universe.tf/installation/

bitnamiのリポジトリ追加

root@k8s-01:~# helm repo add bitnami https://charts.bitnami.com/bitnami

"bitnami" has been added to your repositories

root@k8s-01:~# helm repo list

NAME    URL
bitnami https://charts.bitnami.com/bitnami

bitnamiで利用できるチャートの確認

出力が長い為、一部抜粋しています。

root@k8s-01:~# helm search repo bitnami

NAME                                            CHART VERSION   APP VERSION     DESCRIPTION
bitnami/magento                                 19.0.9          2.4.3           A feature-rich flexible e-commerce solution. It...
bitnami/mariadb                                 9.8.1           10.5.13         Fast, reliable, scalable, and easy to use open-...
bitnami/mariadb-cluster                         1.0.2           10.2.14         DEPRECATED Chart to create a Highly available M...
bitnami/mariadb-galera                          6.0.3           10.6.4          MariaDB Galera is a multi-master database clust...
bitnami/mean                                    6.1.2           4.6.2           DEPRECATED MEAN is a free and open-source JavaS...
bitnami/mediawiki                               12.3.17         1.36.2          Extremely powerful, scalable software and a fea...
bitnami/memcached                               5.15.8          1.6.12          Chart for Memcached
bitnami/metallb                                 2.5.10          0.11.0          The Metal LB for Kubernetes
bitnami/metrics-server                          5.10.8          0.5.1           Metrics Server is a cluster-wide aggregator of ...
bitnami/minio                                   9.0.7           2021.11.9       Bitnami Object Storage based on MinIO® is a...
bitnami/mongodb                                 10.29.2         4.4.10          NoSQL document-oriented database that stores JS...
bitnami/mongodb-sharded                         3.9.14          4.4.10          NoSQL document-oriented database that stores JS...
bitnami/moodle                                  11.1.6          3.11.4          Moodle™ is a learning platform designed t...
bitnami/mxnet                                   2.3.20          1.8.0           A flexible and efficient library for deep learning
bitnami/mysql                                   8.8.12          8.0.27          Chart to create a Highly available MySQL cluster

bitnami/metallbのデフォルト値を確認

出力が長い為、省略します。

root@k8s-01:~# helm show values bitnami/metallb

bitnami/metallbのChart取得

bitnami/metallbのChartを取得します。–untarは.tgzを展開した状態でカレントディレクトリ（今回は/root）にダウンロードします。今回は特に使用しません。

root@k8s-01:~# helm pull bitnami/metallb --untar

Layer 2 Configurationの設定

今回はLayer2モードを使用します。アドレスは各ノードと同じネットワークの範囲でレンジを指定します。

root@k8s-01:~# vim /root/metallb-config.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config
data:
  config: |
    address-pools:
    - name: default
      protocol: layer2
      addresses:
      - 192.168.68.50-192.168.68.59

Namespaceの追加

metallb用のNamespaceを追加します。

root@k8s-01:~# kubectl create namespace metallb-system

namespace/metallb-system created

root@k8s-01:~# kubectl get namespace

NAME              STATUS   AGE
default           Active   16d
kube-node-lease   Active   16d
kube-public       Active   16d
kube-system       Active   16d
metallb-system    Active   24s

bitnami/metallbのHelm Chartをインストール

root@k8s-01:~# helm install metallb bitnami/metallb -f /root/metallb-config.yaml

NAME: metallb
LAST DEPLOYED: Thu Nov 11 16:40:28 2021
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
CHART NAME: metallb
CHART VERSION: 2.5.10
APP VERSION: 0.11.0

** Please be patient while the chart is being deployed **

MetalLB is now running in the cluster

LoadBalancer Services in your cluster are now available on the IPs you
defined in MetalLB's configuration. To see IP assignments,

    kubectl get services -o wide --all-namespaces | grep --color=never -E 'LoadBalancer|NAMESPACE'

should be executed.

To see the currently configured configuration for metallb run

    kubectl get configmaps --namespace default metallb-config -o yaml

in your preferred shell.

root@k8s-01:~# helm uninstall metallb