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ceph-kvstore-tool工具简单介绍
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<p>参考<a href="https://blog.csdn.net/scaleqiao/article/details/51946042" target="_blank" rel="noopener">https://blog.csdn.net/scaleqiao/article/details/51946042</a></p>
<p>大家都知道Ceph的很多数据比如PG log、Monitor的数据都存在kvstore里（leveldb或者RocksDB中），Ceph也提供了查看kvstore里数据的工具，它就是ceph-kvstore-tool。<br><a id="more"></a><br>1 安装ceph-kvstore-tool工具</p>
<p>如果你是从官网释放的rpm包安装的Ceph，那么ceph-kvstore-tool默认是没有安装的，它包含在ceph-test这个rpm中，你可以通过以下方法安装。</p>
<pre><code>yum install ceph-test
</code></pre><p>2 ceph-kvstore-tool命令使用介绍</p>
<p>以下介绍基于Ceph 10.2.3版本，</p>
<pre><code>[root@ceph02 ~]# ceph --version
ceph version 10.2.3 (ecc23778eb545d8dd55e2e4735b53cc93f92e65b)
</code></pre><p>查看帮助</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool -h
Usage: ceph-kvstore-tool <leveldb|rocksdb|...> <store path> command [args...]
Commands:
list [prefix]
list-crc [prefix]
exists <prefix> [key]
get <prefix> <key> [out <file>]
crc <prefix> <key>
get-size [<prefix> <key>]
set <prefix> <key> [ver <N>|in <file>]
store-copy <path> [num-keys-per-tx]
store-crc <path>
</code></pre><p>描述的比较简单，但是基本上告诉你了这个命令的用法。当前使用的是leveldb数据库，store path指定的是leveldb数据库路径，例如mon 目录的store.db， osd目录下的current/omap 目录。</p>
<p>我们知道leveldb是一个kvstore也就是kv的数据库，prefix就是数据库的表名。key就是表里面的key值，而value值这里通过get 后指定输出到out file中。<br>如下所示，list输出格式为 表名：key</p>
<p>查看mon leveldb数据则停止mon服务，osd也是如此</p>
<pre><code>[root@ceph02 ~]# systemctl stop ceph-mon@ceph02
[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ list |head -n 5
2018-03-27 17:18:52.735099 7fede398b040 1 leveldb: Recovering log #265
2018-03-27 17:18:52.735886 7fede398b040 1 leveldb: Level-0 table #267: started
2018-03-27 17:18:52.737658 7fede398b040 1 leveldb: Level-0 table #267: 54804 bytes OK
auth:1
auth:10
auth:100
auth:101
auth:102
</code></pre><p>查看所有表名</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ list |awk -F ':' '{print $1}'|uniq
2018-03-27 17:24:59.608065 7f8580087040 1 leveldb: Recovering log #268
2018-03-27 17:24:59.656403 7f8580087040 1 leveldb: Delete type=3 #266
2018-03-27 17:24:59.656449 7f8580087040 1 leveldb: Delete type=0 #268
auth
logm
mds_health
mds_metadata
mdsmap
monitor
monitor_store
monmap
osd_metadata
osdmap
paxos
pgmap
pgmap_meta
pgmap_osd
pgmap_pg
</code></pre><p>从中我们发现了比较熟悉的各种map，mdsmap、monmap、osdmap、pgmap、auth等。而如上所讲，其中每一张表都有很多表项组成，接下来我们使用ceph-kvstore-tool来查看一下monmap这个表中某个表项中的数据。</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ list| grep monmap
2018-03-27 17:26:52.435840 7f6601faf040 1 leveldb: Recovering log #270
2018-03-27 17:26:52.440832 7f6601faf040 1 leveldb: Delete type=3 #269
2018-03-27 17:26:52.440874 7f6601faf040 1 leveldb: Delete type=0 #270
monmap:1
monmap:2
monmap:first_committed
monmap:last_committed
monmap:latest
</code></pre><p>从中，可以看出monmap目前有三个表项，看看monmap:1这项包含什么数据。其中指定leveldb数据库，get获取表monmap，中key为1 的值，将值out指定到文件monmap.1.txt中</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ get monmap 1 out monmap.1.txt
2018-03-27 17:30:25.096235 7f8181d4b040 1 leveldb: Recovering log #272
(monmap, 1)
2018-03-27 17:30:25.120278 7f8181d4b040 1 leveldb: Delete type=3 #271
2018-03-27 17:30:25.120318 7f8181d4b040 1 leveldb: Delete type=0 #272
[root@ceph02 ~]# file monmap.1.txt
monmap.1.txt: DBase 3 data file (301334528 records)
</code></pre><p>导出来的这个文件是一个DBase文件，是编译过的，需要使用工具来解析它。我们知道Ceph中很多数据都是经过序列化（encode）之后持久化的（这里有篇文章有相关的介绍<a href="https://www.ustack.com/blog/cephxuliehua/），所以要解析这些数据需要将它们反序列化（decode），Ceph提供了一个反序列化的工具ceph-dencode，关于ceph-dencoder的使用会在以后介绍。" target="_blank" rel="noopener">https://www.ustack.com/blog/cephxuliehua/），所以要解析这些数据需要将它们反序列化（decode），Ceph提供了一个反序列化的工具ceph-dencode，关于ceph-dencoder的使用会在以后介绍。</a></p>
<pre><code>[root@ceph02 ~]# ceph-dencoder import monmap.1.txt type MonMap decode dump_json
{
"epoch": 1,
"fsid": "f6110559-f0f1-4e14-9213-f29471329ee9",
"modified": "2017-02-09 15:34:21.701901",
"created": "2017-02-09 15:34:21.701901",
"mons": [
{
"rank": 0,
"name": "ceph02",
"addr": "192.168.0.40:6789\/0"
}
]
</code></pre><p>}<br>可以看到内容。如下查看monmap表中key为1 的size</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ get-size monmap 1
2018-03-27 17:39:57.819864 7f2800190040 1 leveldb: Recovering log #276
log - 0
misc - 65908
sst - 12156146
total - 12222054
total: 12222054
estimated store size: 12222054
(monmap,1) size 192
2018-03-27 17:39:57.821447 7f2800190040 1 leveldb: Delete type=0 #276
2018-03-27 17:39:57.821473 7f2800190040 1 leveldb: Delete type=3 #275
</code></pre><p>如下查看osdmap信息</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ list osdmap
2018-03-27 17:43:46.711599 7fcf02a6a040 1 leveldb: Recovering log #280
osdmap:1
osdmap:10
osdmap:11
。。。
osdmap:19
。。。。
osdmap:full_45
osdmap:full_46
osdmap:full_47
osdmap:full_48
</code></pre><p>查看full_48内容</p>
<pre><code>[root@ceph02 ~]# ceph-kvstore-tool leveldb /var/lib/ceph/mon/ceph-ceph02/store.db/ get osdmap full_48 out osdmap-full48.txt
2018-03-27 17:44:34.623250 7f8bd795f040 1 leveldb: Recovering log #282
(osdmap, full_48)
2018-03-27 17:44:34.624751 7f8bd795f040 1 leveldb: Delete type=3 #281
2018-03-27 17:44:34.624785 7f8bd795f040 1 leveldb: Delete type=0 #282
[root@ceph02 ~]# ceph-dencoder import osdmap-full48.txt type OSDMap decode dump_json
{
"epoch": 48,
"fsid": "f6110559-f0f1-4e14-9213-f29471329ee9",
"created": "2017-02-09 15:34:22.284668",
"modified": "2018-03-27 16:55:39.569689",
"flags": "sortbitwise",
"cluster_snapshot": "",
"pool_max": 2,
"max_osd": 5,
"pools": [
{
"pool": 0,
"pool_name": "rbd",
"flags": 1,
"flags_names": "hashpspool",
"type": 1,
"size": 1,
"min_size": 1,
"crush_ruleset": 0,
"object_hash": 2,
"pg_num": 64,
"pg_placement_num": 64,
"crash_replay_interval": 0,
"last_change": "22",
"last_force_op_resend": "0",
"auid": 0,
"snap_mode": "selfmanaged",
"snap_seq": 0,
"snap_epoch": 0,
"pool_snaps": [],
"removed_snaps": "[]",
"quota_max_bytes": 0,
"quota_max_objects": 0,
"tiers": [],
"tier_of": -1,
"read_tier": -1,
"write_tier": -1,
"cache_mode": "none",
"target_max_bytes": 0,
"target_max_objects": 0,
"cache_target_dirty_ratio_micro": 0,
"cache_target_dirty_high_ratio_micro": 0,
"cache_target_full_ratio_micro": 0,
"cache_min_flush_age": 0,
"cache_min_evict_age": 0,
"erasure_code_profile": "",
"hit_set_params": {
"type": "none"
},
"hit_set_period": 0,
"hit_set_count": 0,
"use_gmt_hitset": true,
"min_read_recency_for_promote": 0,
"min_write_recency_for_promote": 0,
"hit_set_grade_decay_rate": 0,
"hit_set_search_last_n": 0,
"grade_table": [],
"stripe_width": 0,
"expected_num_objects": 0,
"fast_read": false,
"options": {}
},
{
"pool": 1,
"pool_name": "data",
"flags": 1,
"flags_names": "hashpspool",
"type": 1,
"size": 1,
"min_size": 1,
"crush_ruleset": 0,
"object_hash": 2,
"pg_num": 64,
"pg_placement_num": 64,
"crash_replay_interval": 45,
"last_change": "29",
"last_force_op_resend": "0",
"auid": 0,
"snap_mode": "selfmanaged",
"snap_seq": 0,
"snap_epoch": 0,
"pool_snaps": [],
"removed_snaps": "[]",
"quota_max_bytes": 0,
"quota_max_objects": 0,
"tiers": [],
"tier_of": -1,
"read_tier": -1,
"write_tier": -1,
"cache_mode": "none",
"target_max_bytes": 0,
"target_max_objects": 0,
"cache_target_dirty_ratio_micro": 400000,
"cache_target_dirty_high_ratio_micro": 600000,
"cache_target_full_ratio_micro": 800000,
"cache_min_flush_age": 0,
"cache_min_evict_age": 0,
"erasure_code_profile": "",
"hit_set_params": {
"type": "none"
},
"hit_set_period": 0,
"hit_set_count": 0,
"use_gmt_hitset": true,
"min_read_recency_for_promote": 0,
"min_write_recency_for_promote": 0,
"hit_set_grade_decay_rate": 0,
"hit_set_search_last_n": 0,
"grade_table": [],
"stripe_width": 0,
"expected_num_objects": 0,
"fast_read": false,
"options": {}
},
{
"pool": 2,
"pool_name": "metadata",
"flags": 1,
"flags_names": "hashpspool",
"type": 1,
"size": 1,
"min_size": 1,
"crush_ruleset": 0,
"object_hash": 2,
"pg_num": 64,
"pg_placement_num": 64,
"crash_replay_interval": 0,
"last_change": "32",
"last_force_op_resend": "0",
"auid": 0,
"snap_mode": "selfmanaged",
"snap_seq": 0,
"snap_epoch": 0,
"pool_snaps": [],
"removed_snaps": "[]",
"quota_max_bytes": 0,
"quota_max_objects": 0,
"tiers": [],
"tier_of": -1,
"read_tier": -1,
"write_tier": -1,
"cache_mode": "none",
"target_max_bytes": 0,
"target_max_objects": 0,
"cache_target_dirty_ratio_micro": 400000,
"cache_target_dirty_high_ratio_micro": 600000,
"cache_target_full_ratio_micro": 800000,
"cache_min_flush_age": 0,
"cache_min_evict_age": 0,
"erasure_code_profile": "",
"hit_set_params": {
"type": "none"
},
"hit_set_period": 0,
"hit_set_count": 0,
"use_gmt_hitset": true,
"min_read_recency_for_promote": 0,
"min_write_recency_for_promote": 0,
"hit_set_grade_decay_rate": 0,
"hit_set_search_last_n": 0,
"grade_table": [],
"stripe_width": 0,
"expected_num_objects": 0,
"fast_read": false,
"options": {}
}
],
"osds": [
{
"osd": 3,
"uuid": "74267031-f0a0-4bbc-9952-11726bdda80b",
"up": 0,
"in": 0,
"weight": 0.000000,
"primary_affinity": 1.000000,
"last_clean_begin": 38,
"last_clean_end": 40,
"up_from": 43,
"up_thru": 43,
"down_at": 46,
"lost_at": 0,
"public_addr": "192.168.1.169:6805\/17244",
"cluster_addr": "192.168.1.169:6806\/17244",
"heartbeat_back_addr": "192.168.1.169:6807\/17244",
"heartbeat_front_addr": "192.168.1.169:6808\/17244",
"state": [
"autoout",
"exists"
]
},
{
"osd": 4,
"uuid": "9ca8254e-3036-49b7-a340-66831590b37b",
"up": 1,
"in": 1,
"weight": 1.000000,
"primary_affinity": 1.000000,
"last_clean_begin": 36,
"last_clean_end": 40,
"up_from": 43,
"up_thru": 43,
"down_at": 42,
"lost_at": 0,
"public_addr": "192.168.1.169:6801\/17240",
"cluster_addr": "192.168.1.169:6802\/17240",
"heartbeat_back_addr": "192.168.1.169:6803\/17240",
"heartbeat_front_addr": "192.168.1.169:6804\/17240",
"state": [
"exists",
"up"
]
}
],
"osd_xinfo": [
{
"osd": 3,
"down_stamp": "2018-03-27 16:26:00.221545",
"laggy_probability": 0.000000,
"laggy_interval": 0,
"features": 576460752032874495,
"old_weight": 65536
},
{
"osd": 4,
"down_stamp": "2018-03-27 15:46:44.704581",
"laggy_probability": 0.000000,
"laggy_interval": 0,
"features": 576460752032874495,
"old_weight": 0
}
],
"pg_temp": [],
"primary_temp": [],
"blacklist": {},
"erasure_code_profiles": {
"default": {
"k": "2",
"m": "1",
"plugin": "jerasure",
"technique": "reed_sol_van"
}
}
}
</code></pre><p>后期具体使用过程结合实际情况进行。</p>
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缺失模块。<br/>1、请确保node版本大于6.2<br/>2、在博客根目录（注意不是yilia根目录）执行以下命令：<br/> npm i hexo-generator-json-content --save<br/><br/>
3、在根目录_config.yml里添加配置：
<pre style="font-size: 12px;" q-show="jsonFail">
jsonContent:
meta: false
pages: false
posts:
title: true
date: true
path: true
text: false
raw: false
content: false
slug: false
updated: false
comments: false
link: false
permalink: false
excerpt: false
categories: false
tags: true
</pre>
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