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从 Ceph 集群中移除节点

文档时效性说明

本文为早期笔记，可能存在版本过时、命令失效、链接失效、最佳实践变化等问题。请以官方最新文档为准。

原英文标题：Remove a node from Ceph cluster

1. 从主机上驱逐所有守护进程

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ceph orch host drain arch03

2. 等待 OSD 上的所有 PG 被重新分配

通过以下方式获取 OSD 移除状态：

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ceph orch osd rm status

等待直到显示 "No OSD remove/replace operations reported"

3. 从集群中移除主机

首先，确保主机上没有守护进程在运行：

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ceph orch ps arch03

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No daemons reported

然后，将其从集群中移除：

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ceph orch host rm arch03

验证：

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ceph -s

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  cluster:
    id:     7e871668-7b83-11ee-8975-00155d0b0b04
    health: HEALTH_WARN
            Failed to apply 1 service(s): mon

  services:
    mon: 3 daemons, quorum arch01,arch02,arch04 (age 10m)
    mgr: arch01.ehmhjd(active, since 2h), standbys: arch02.ktsjoy
    osd: 3 osds: 3 up (since 6m), 3 in (since 6m)

  data:
    pools:   1 pools, 1 pgs
    objects: 2 objects, 449 KiB
    usage:   82 MiB used, 381 GiB / 381 GiB avail
    pgs:     1 active+clean

4. 销毁并擦除 OSD

在已移除的主机上：

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ceph-volume lvm zap /dev/sdb --destroy

5. 原文（English）

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---
tags:
  - Ceph
  - 存储
---

# Remove a node from Ceph cluster


!!! warning "文档时效性说明"
    本文为早期笔记，可能存在版本过时、命令失效、链接失效、最佳实践变化等问题。请以官方最新文档为准。

## Drain all daemons from the host
ceph orch host drain arch03 
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## Wait until all PGs on OSDs are replaced

Get OSD removing status by :
ceph orch osd rm status 
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Wait until "No OSD remove/replace operations reported"

## Remove the host from the cluster

First, make sure no daemon is running on the host:
ceph orch ps arch03 
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No daemons reported 
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Then, remove it from the cluster:
ceph orch host rm arch03 
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Validate by :
ceph -s 
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cluster: id: 7e871668-7b83-11ee-8975-00155d0b0b04 health: HEALTH_WARN Failed to apply 1 service(s): mon

services: mon: 3 daemons, quorum arch01,arch02,arch04 (age 10m) mgr: arch01.ehmhjd(active, since 2h), standbys: arch02.ktsjoy osd: 3 osds: 3 up (since 6m), 3 in (since 6m)

data: pools: 1 pools, 1 pgs objects: 2 objects, 449 KiB usage: 82 MiB used, 381 GiB / 381 GiB avail pgs: 1 active+clean 

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## Destroy and wipe OSD

On the removed host :
ceph-volume lvm zap /dev/sdb --destroy 
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