🚢 Kubernetes: On-premise 🚢

Kubernetes를 직접 구축해보고 서비스를 배포해보기 위한 코드들입니다.

No.	Stacks	Features
0️⃣	⭕ Kubelet ⭕ Kubeadm ⭕ Kubectl ⭕ Calico	✅ 단일 node로 실행하므로 master node의 taint 변경
1️⃣	⭕ Metrics Server ⭕ Local Path Provisioner ⭕ MetalLB ⭕ Traefik	✅ thomseddon/traefik-forward-auth를 통한 Google OAuth Middleware
2️⃣	⭕ Argo CD
3️⃣	⭕ Prometheus ⭕ Grafana	✅ Node Exporter Full, Traefik Official Kubernetes Dashboard 사용 가능
3️⃣	⭕ Apache Airflow	✅ Kubernetes Executor 사용
3️⃣	⭕ Nextcloud	✅ Backend PostgreSQL 사용
🎨	⭕ @rldnd	✅ 모든 서비스를 한번에 접속할 수 있는 portal 추가 ✅ GitHub Actions 및 Argo CD 기반 CI/CD 적용

%%{
    init: {
        'theme': 'default',
        'themeVariables': {
            'fontFamily': 'Times New Roman'
        }
    }
}%%
flowchart TD
    user[User]
    dns[Domain Namer Server: GoDaddy]
    user--Domain request</br />(service.zerohertz.xyz)-->dns
    dns--DNS routing<br />(XXX.XXX.XXX.XXX)-->router
    router--Port forwarding-->ingress

    github[GitHub]
    click github "https://github.com/Zerohertz/k8s-on-premise" _blank
    github--Webhook</br />(argocd.zerohertz.xyz)-->dns

    router--Google 2FA-->fail2ban
    fail2ban-->ssh

    slack[Slack Bot]
    airflow-kubernetes-pod-operator-->slack

    subgraph Home
        router["Router<br />(XXX.XXX.XXX.XXX)"]
        subgraph 0hz-controlplane
            fail2ban[Fail2Ban]
            ssh[SSH]
            node-exporter[Node Exporter]
            node-exporter-->prometheus
            subgraph Kubernetes
                kube-apiserver[kube-apiserver]
                kube-scheduler[kube-scheduler]
                kube-controller-manager[kube-controller-manager]
                kubelet[Kubelet]
                ingress[Ingress: Traefik]
                cni[CNI: Calico]

                argo-cd-application-controller-->kube-apiserver
                airflow-triggerer-->kube-apiserver
                kube-apiserver-->kube-scheduler
                kube-apiserver-->kube-controller-manager
                kube-scheduler-->kubelet
                kube-controller-manager-->kubelet

                storage-class[Storage Class:<br/>Local Path Storage]

                kubelet-.->Monitoring
                kubelet-.->Airflow
                kubelet-.->NextCloud
                kubelet-.->airflow-kubernetes-pod-operator

                ingress--Ingress-->argo-cd-server
                ingress--Ingress-->prometheus
                ingress--Ingress-->grafana
                ingress--Ingress-->airflow-webserver
                ingress--Ingress-->nextcloud

                subgraph Argo-CD
                    argo-cd-server[Server]
                    argo-cd-dex-server[Dex Server]
                    argo-cd-repo-server[Repo Server]
                    argo-cd-application-controller[Application Controller]
                    argo-cd-applicationset-controller[ApplicationSet Controller]
                    argo-cd-notifications-controller[Notifications Controller]
                    argo-cd-db[(Redis)]
                    argo-cd-server-->argo-cd-dex-server
                    argo-cd-server-->argo-cd-repo-server
                    argo-cd-server--Sync Apps-->argo-cd-application-controller
                    argo-cd-server-->argo-cd-applicationset-controller
                    argo-cd-server-->argo-cd-notifications-controller
                    argo-cd-repo-server-->argo-cd-db
                    argo-cd-application-controller-->argo-cd-repo-server
                    argo-cd-applicationset-controller-->argo-cd-repo-server
                    argo-cd-notifications-controller--Monitors Events-->argo-cd-server
                end

                subgraph Monitoring
                    prometheus[Prometheus]
                    grafana[Grafana]
                    prometheus-->grafana
                end

                subgraph Airflow
                    airflow-webserver[Webserver]
                    airflow-db[(PostgreSQL)]
                    airflow-statsd[statsd]
                    airflow-triggerer[triggerer]
                    airflow-kubernetes-pod-operator[KubernetesPodOperator]
                    airflow-webserver-->airflow-db
                    airflow-webserver-->airflow-statsd
                    airflow-webserver-->airflow-triggerer
                end

                subgraph NextCloud
                    nextcloud[NextCloud]
                    nextcloud-db[(PostgreSQL)]
                    nextcloud-->nextcloud-db
                end
            end
        end
    end
    style user fill:#800a0a,color:#fff,stroke:#000
    style dns fill:#1BDBDB,stroke:#000
    style github fill:#000,color:#fff,stroke:#000
    style slack fill:#4A154B,color:#fff,stroke:#000
    style 0hz-controlplane fill:#f0a0a0,stroke:#800a0a
    style Kubernetes fill:#82ACF5,stroke:#326CE5
    style Argo-CD fill:#EF7B4D,stroke:#EF7B4D
    style Monitoring fill:#F6A26C,stroke:#E6522C
    style Airflow fill:#71BCFE,stroke:#017CEE
    style NextCloud fill:#30A2F9,stroke:#0082C9

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• 모든 서비스는 https://${SERVICE}.${DDNS}에 Argo CD로 배포됩니다.