添加 '存储/ceph/p版本安装/6-初始化ceph最小集群.md'
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存储/ceph/p版本安装/6-初始化ceph最小集群.md
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存储/ceph/p版本安装/6-初始化ceph最小集群.md
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使用cephadm bootstrap初始化最小集群
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> cephadm bootstrap 过程是在单一节点上创建一个小型的ceph集群，包括一个ceph monitor和一个ceph mgr，以及监控组件，包括prometheus、node-exporter等。
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```shell
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## 初始化时，指定了mon-ip、集群网段、dashboard初始用户名和密码
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# cephadm bootstrap --mon-ip 192.168.59.241 --cluster-network 10.168.59.0/24 --initial-dashboard-user admin --initial-dashboard-password demo2023
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Creating directory /etc/ceph for ceph.conf
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Verifying podman|docker is present...
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Verifying lvm2 is present...
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Verifying time synchronization is in place...
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Unit chronyd.service is enabled and running
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Repeating the final host check...
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docker (/usr/bin/docker) is present
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systemctl is present
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lvcreate is present
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Unit chronyd.service is enabled and running
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Host looks OK
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Cluster fsid: 2e1228b0-0781-11ee-aa8a-000c2921faf1
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Verifying IP 192.168.59.241 port 3300 ...
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Verifying IP 192.168.59.241 port 6789 ...
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Mon IP `192.168.59.241` is in CIDR network `192.168.59.0/24`
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Mon IP `192.168.59.241` is in CIDR network `192.168.59.0/24`
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Pulling container image quay.io/ceph/ceph:v17...
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Ceph version: ceph version 17.2.6 (d7ff0d10654d2280e08f1ab989c7cdf3064446a5) quincy (stable)
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Extracting ceph user uid/gid from container image...
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Creating initial keys...
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Creating initial monmap...
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Creating mon...
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Waiting for mon to start...
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Waiting for mon...
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mon is available
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Assimilating anything we can from ceph.conf...
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Generating new minimal ceph.conf...
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Restarting the monitor...
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Setting mon public_network to 192.168.59.0/24
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Setting cluster_network to 10.168.59.0/24
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Wrote config to /etc/ceph/ceph.conf
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Wrote keyring to /etc/ceph/ceph.client.admin.keyring
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Creating mgr...
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Verifying port 9283 ...
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Waiting for mgr to start...
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Waiting for mgr...
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mgr not available, waiting (1/15)...
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mgr not available, waiting (2/15)...
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mgr not available, waiting (3/15)...
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mgr not available, waiting (4/15)...
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mgr is available
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Enabling cephadm module...
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Waiting for the mgr to restart...
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Waiting for mgr epoch 5...
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mgr epoch 5 is available
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Setting orchestrator backend to cephadm...
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Generating ssh key...
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Wrote public SSH key to /etc/ceph/ceph.pub
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Adding key to root@localhost authorized_keys...
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Adding host ceph01...
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Deploying mon service with default placement...
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Deploying mgr service with default placement...
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Deploying crash service with default placement...
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Deploying prometheus service with default placement...
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Deploying grafana service with default placement...
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Deploying node-exporter service with default placement...
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Deploying alertmanager service with default placement...
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Enabling the dashboard module...
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Waiting for the mgr to restart...
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Waiting for mgr epoch 9...
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mgr epoch 9 is available
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Generating a dashboard self-signed certificate...
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Creating initial admin user...
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Fetching dashboard port number...
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Ceph Dashboard is now available at:
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URL: https://ceph01:8443/
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User: admin
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Password: p5tuqo17we
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Enabling client.admin keyring and conf on hosts with "admin" label
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Saving cluster configuration to /var/lib/ceph/2e1228b0-0781-11ee-aa8a-000c2921faf1/config directory
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Enabling autotune for osd_memory_target
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You can access the Ceph CLI as following in case of multi-cluster or non-default config:
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sudo /usr/sbin/cephadm shell --fsid 2e1228b0-0781-11ee-aa8a-000c2921faf1 -c /etc/ceph/ceph.conf -k /etc/ceph/ceph.client.admin.keyring
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Or, if you are only running a single cluster on this host:
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sudo /usr/sbin/cephadm shell
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Please consider enabling telemetry to help improve Ceph:
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ceph telemetry on
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For more information see:
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https://docs.ceph.com/docs/master/mgr/telemetry/
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## 也可以在初始化时指定dashboard用户名和密码 --initial-dashboard-user admin --initial-dashboard-password demo2023
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# ls /etc/ceph/
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ceph.client.admin.keyring ceph.conf ceph.pub rbdmap
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```
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- ceph.client.admin.keyring 是具有ceph管理员的秘钥
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- ceph.conf 是最小化配置文件
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- ceph.pub 是一个公钥，拷贝到其他节点后，可以免密登录。
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> 在5个以上ceph节点时，默认会将其中5个节点当做mon，这可以从`ceph orch ls`中看出来
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```shell
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# ceph orch ls
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NAME PORTS RUNNING REFRESHED AGE PLACEMENT
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alertmanager ?:9093,9094 1/1 7m ago 46m count:1
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crash 1/1 7m ago 46m *
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grafana ?:3000 1/1 7m ago 46m count:1
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mgr 1/2 7m ago 46m count:2
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mon 1/5 7m ago 46m count:5
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node-exporter ?:9100 1/1 7m ago 46m *
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prometheus ?:9095 1/1 7m ago 46m count:1
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```
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> 初始化mon后，此时集群还处于WARN状态，没有OSD，MON的数量也才只有1个，MGR也只有1个，所以接下来就是先添加ceph节点。
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```shell
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# ceph -s
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cluster:
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id: 67ccccf2-07f6-11ee-a1c2-000c2921faf1
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health: HEALTH_WARN
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OSD count 0 < osd_pool_default_size 3
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services:
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mon: 1 daemons, quorum ceph01 (age 9m)
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mgr: ceph01.sdqukl(active, since 7m)
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osd: 0 osds: 0 up, 0 in
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data:
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pools: 0 pools, 0 pgs
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objects: 0 objects, 0 B
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usage: 0 B used, 0 B / 0 B avail
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pgs:
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```
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