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Commit ea790ea6 authored by JooHan Hong's avatar JooHan Hong
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k8s,swarm storage init

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      [![logo](https://www.hongsnet.net/images/logo.gif)](https://www.hongsnet.net)
      # Storage 구조에 대한 비교 및 검토
      > Docker Swarm과 K8s의 스토리지 구성을 비교하고, 도입 및 적용(**NFS 스토리지**)을 검토한다.
      ## Docker `Swarm`
      Swarm은 단순하게 다음과 같이 volume을 명시해주면 된다.
      ```python
      version: '3'
      services:
      hongsnet:
      image: registry.hongsnet.net/joohan.hong/docker/hongsnet:latest
      volumes:
      - HOME:/home
      - EDU_DATA:/home/edu/public_html/HongsBoard/Data
      - EDU_EDITOR:/home/edu/public_html/HongsBoard/Web_editor/EDU"
      - EDU_FILE:/home/edu/public_html/HongsBoard/Web_editor/FILE"
      - HONGS_DATA:/home/hongsnet/public_html/Data"
      - HONGS_EDITOR:/home/hongsnet/public_html/Web_editor/FILE"
      - NEWSYSTEM_DATA:/home/newhongsystem/public_html/Data"
      - NEWSYSTEM_EDITOR:/home/newhongsystem/public_html/Web_editor/FILE"
      ports:
      - "80:80"
      deploy:
      mode: global
      placement:
      constraints: [node.hostname != TB2-DOCKER]
      update_config:
      parallelism: 5
      delay: 10s
      restart_policy:
      condition: on-failure
      max_attempts: 3
      window: 120s
      volumes:
      HOME:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_SRC/home"
      EDU_DATA:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/EDU/Data"
      EDU_EDITOR:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/EDU/Web_editor/EDU"
      EDU_FILE:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/EDU/Web_editor/FILE"
      HONGS_DATA:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/HONGSNET/Data"
      HONGS_EDITOR:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/HONGSNET/Web_editor/FILE"
      NEWSYSTEM_DATA:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/NEWHONGSYSTEM/Data"
      NEWSYSTEM_EDITOR:
      driver_opts:
      type: "nfs"
      o: "addr=192.192.0.254,nolock,soft,rw"
      device: ":/WEB_DATA/NEWHONGSYSTEM/Web_editor/FILE"
      ```
      ## `K8s`
      K8s는 Swarm과 다르게, 다음과 같이 PV(**persistentVolume**),PVC(**persistentVolumeClaim**)라는 Volume으로 진행해야 한다.
      > 생성 및 적용순서는 PV -> PVC -> Bound -> Use
      - **PersistentVolume, PersistentVolumeClian Object 생성**
      다음과 같이 Ojbect를 생성하면 된다.
      ```python
      # cat nfs-volume.yaml
      kind: PersistentVolume
      apiVersion: v1
      metadata:
      name: webdata-edu-volume
      labels:
      type: local
      spec:
      capacity:
      storage: 100Gi
      accessModes:
      - ReadWriteMany
      volumeMode: Filesystem
      mountOptions:
      - soft
      - timeo=600
      - noatime
      - _netdev
      - retrans=3
      - rsize=65536
      - wsize=65536
      nfs:
      server: "192.192.0.254"
      path: "/WEB_DATA/EDU/Data"
      ---
      apiVersion: v1
      kind: PersistentVolumeClaim
      metadata:
      name: webdata-edu-volume-pvc
      spec:
      accessModes:
      - ReadWriteMany
      resources:
      requests:
      storage: 100Gi
      volumeName: webdata-edu-volume
      ---
      kind: PersistentVolume
      apiVersion: v1
      metadata:
      name: webeditor-edu-volume
      labels:
      type: local
      spec:
      capacity:
      storage: 100Gi
      accessModes:
      - ReadWriteMany
      volumeMode: Filesystem
      mountOptions:
      - soft
      - timeo=600
      - noatime
      - _netdev
      - retrans=3
      - rsize=65536
      - wsize=65536
      nfs:
      server: "192.192.0.254"
      path: "/WEB_DATA/EDU/Web_editor/EDU"
      ---
      apiVersion: v1
      kind: PersistentVolumeClaim
      metadata:
      name: webeditor-edu-volume-pvc
      spec:
      accessModes:
      - ReadWriteMany
      resources:
      requests:
      storage: 100Gi
      volumeName: webeditor-edu-volume
      ---
      kind: PersistentVolume
      apiVersion: v1
      metadata:
      name: webeditorfile-edu-volume
      labels:
      type: local
      spec:
      capacity:
      storage: 100Gi
      accessModes:
      - ReadWriteMany
      volumeMode: Filesystem
      mountOptions:
      - soft
      - timeo=600
      - noatime
      - _netdev
      - retrans=3
      - rsize=65536
      - wsize=65536
      nfs:
      server: "192.192.0.254"
      path: "/WEB_DATA/EDU/Web_editor/FILE"
      ---
      apiVersion: v1
      kind: PersistentVolumeClaim
      metadata:
      name: webeditorfile-edu-volume-pvc
      spec:
      accessModes:
      - ReadWriteMany
      resources:
      requests:
      storage: 100Gi
      volumeName: webeditorfile-edu-volume
      ```
      > 여기서는 아래에 사용중인 모든 볼륨의 Object를 표시하지않고, 위와 같은 형식으로 추가한다.
      ```bash
      # kubectl apply -f nfs-volume.yaml
      ```
      현재 홍쓰넷에서 사용중인 Volume의 상태는 다음과 같다.
      ```bash
      # kubectl get pv,pvc
      NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
      persistentvolume/webdata-edu-volume 100Gi RWX Retain Bound default/webdata-edu-volume-pvc 7h51m
      persistentvolume/webdata-hongsnet-volume 100Gi RWX Retain Bound default/webdata-hongsnet-volume-pvc 7h51m
      persistentvolume/webdata-newsystem-volume 100Gi RWX Retain Bound default/webdata-newsystem-volume-pvc 7h51m
      persistentvolume/webeditor-edu-volume 100Gi RWX Retain Bound default/webeditor-edu-volume-pvc 7h51m
      persistentvolume/webeditor-hongsnet-volume 100Gi RWX Retain Bound default/webeditor-hongsnet-volume-pvc 7h51m
      persistentvolume/webeditor-newsystem-volume 100Gi RWX Retain Bound default/webeditor-newsystem-volume-pvc 7h51m
      persistentvolume/webeditorfile-edu-volume 100Gi RWX Retain Bound default/webeditorfile-edu-volume-pvc 7h51m
      persistentvolume/websrc-home-volume 100Gi RWX Retain Bound default/websrc-home-volume-pvc 7h51m
      NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
      persistentvolumeclaim/webdata-edu-volume-pvc Bound webdata-edu-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webdata-hongsnet-volume-pvc Bound webdata-hongsnet-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webdata-newsystem-volume-pvc Bound webdata-newsystem-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webeditor-edu-volume-pvc Bound webeditor-edu-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webeditor-hongsnet-volume-pvc Bound webeditor-hongsnet-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webeditor-newsystem-volume-pvc Bound webeditor-newsystem-volume 100Gi RWX 7h51m
      persistentvolumeclaim/webeditorfile-edu-volume-pvc Bound webeditorfile-edu-volume 100Gi RWX 7h51m
      persistentvolumeclaim/websrc-home-volume-pvc Bound websrc-home-volume 100Gi RWX 7h51m
      ```
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