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TrueNAS Core 做Replication 去另一部TrueNAS：超簡單教學

Replication 超實用，如果你有兩部 NAS，想同步資料、做災難復原（disaster recovery）或者簡單備份都可以。

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TrueNAS Core 做Replication 去另一部TrueNAS：超簡單教學

相信大家每次做system update 都會驚出意外，尤其NAS 放咗data，開唔返機分分鐘連file 都無埋。
如果手上有部幾年前裝好嘅TrueNAS Core，更新之前想做個backup，其實可以開個replication。
呢個功能超實用，如果你有兩部 NAS，想同步資料、做災難復原（disaster recovery）或者簡單備份都可以。

點解要做 Replication？

  • 資料安全：一部機壞咗，都另一機有備份，唔使喊。(拎出去data recovery 係天價…)
  • 自動化：設定一次，就定期自動sync data，慳時間。
  • ZFS 優勢：TrueNAS 用ZFS，replication 超快又可靠，因為佢支援snapshot-based 傳輸。

Lab Configuration

Source NAS:

  • OS: TrueNAS Core 13.0
  • IP: 192.168.104.2

Target NAS:

  • OS: TrueNAS 25.10
  • IP: 192.168.104.3

設定SSH Connection

  1. 登入Source NAS，左邊揀System > SSH Keypairs > Add SSH Keypairs

  2. 填Name，e.g. migration 於SSH Keypairs form 填Name

  3. Click GENERATE KEYPAIR

  4. Copy 低Public Key

  5. Submit

  6. 左邊揀System > SSH Connections > Add SSH Connections

  7. 填寫所需資料

    KeyValue
    Name隨心填, e.g. target-nas
    Setup MethodManual
    HostTarget NAS 嘅 IP
    Port22
    Usernameroot
    Private Keymigration

    填寫SSH Connections add form

    填好之後㩒 Submit

  8. 登入Target NAS，左邊揀Credentials > Users > Edit root Credentials > Users Edit "root"

  9. 開SSH Access 開SSH Access

  10. 貼上Public SSH Key

  11. Save

  12. 左邊揀System > Services

揀System > Services

  1. 開SSH

開SSH

設定 Replication Task

  1. 登入Source NAS，左邊揀Tasks > Replication Tasks Tasks > Replication Tasks

  2. 填寫所需資料

    KeyValue
    Source LocationOn this System
    Distination LocationOn a Different System
    SSH Connectionstarget-nas
    Source揀想replicate ge dataset
    Distination目標dataset, e.g. main/backup/my-target-nas
    RecursiveTick
    Encryption唔開
    SSH Transfer SecurityEncryption

    填寫Replication Task form

  3. Run Now Click Run Now

點樣喺target NAS 開到d files?

  1. 登入Source NAS，左邊揀Storage > Pools Storage > Pools

  2. 揀返你隻dataset，再Export Key Dataset > Export Key

  3. 登入Target NAS，左邊揀Datasets 揀Datasets

  4. 揀返你隻dataset，再Unlock Unlock dataset

常見問題

開咗Destination Encryption

cannot receive new filesystem stream: encryption property 'encryption' cannot be set or excluded for raw streams.
cannot open 'main/backup/my-target-nas': dataset does not exist.

解決方法：去Replication Task 熄咗Encryption
放心，data 都係有加密，要用source NAS encryption key 解密

無用到root user 做SSH connection (e.g. 用咗truenas_admim)

cannot receive new filesystem stream: permission denied
cannot open 'main/backup/my-target-nas': dataset does not exist.

解決方法：去SSH Connection set 返做root user
當然target NAS 都要落public SSH key 去root user

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