Ceph Reef : Cephadm #1 Configure Cluster2023/08/21 |
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Configure Ceph Cluster with [Cephadm] that is a Ceph Cluster Deploy tool.
For example on here, Configure Ceph Cluster with 3 Nodes like follows.
Furthermore, each Storage Node has a free block device to use on Ceph Nodes. (use [/dev/sdb] on this example)
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+----------------------------+----------------------------+
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|10.0.0.51 |10.0.0.52 |10.0.0.53
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [node01.srv.world] | | [node02.srv.world] | | [node03.srv.world] |
| Object Storage +----+ Object Storage +----+ Object Storage |
| Monitor Daemon | | | | |
| Manager Daemon | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] |
[Cephadm] uses Python 3 to configure Nodes,
so Install Python 3 on all Nodes, refer to here [1]. |
| [2] | [Cephadm] deploys Container based Ceph Cluster, so Install Podman on all Nodes. |
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[root@node01 ~]# dnf -y install podman |
| [3] | Install [Cephadm] on a Node. (it's [node01] on this example) |
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[root@node01 ~]#
[root@node01 ~]# dnf -y install centos-release-ceph-reef epel-release
dnf -y install cephadm
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| [4] | Bootstrap new Ceph Cluster. |
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[root@node01 ~]# mkdir -p /etc/ceph [root@node01 ~]# cephadm bootstrap --mon-ip 10.0.0.51 --allow-fqdn-hostname
Verifying podman|docker is present...
Verifying lvm2 is present...
Verifying time synchronization is in place...
Unit chronyd.service is enabled and running
Repeating the final host check...
podman (/usr/bin/podman) version 4.7.0 is present
systemctl is present
lvcreate is present
Unit chronyd.service is enabled and running
Host looks OK
Cluster fsid: cc27a71e-3fda-11ee-99e9-5254000f7c42
Verifying IP 10.0.0.51 port 3300 ...
Verifying IP 10.0.0.51 port 6789 ...
Mon IP `10.0.0.51` is in CIDR network `10.0.0.0/24`
Mon IP `10.0.0.51` is in CIDR network `10.0.0.0/24`
Internal network (--cluster-network) has not been provided, OSD replication will default to the public_network
Pulling container image quay.io/ceph/ceph:v18...
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firewalld ready
Ceph Dashboard is now available at:
URL: https://node01.srv.world:8443/
User: admin
Password: m4npkoh4yj
Enabling client.admin keyring and conf on hosts with "admin" label
Saving cluster configuration to /var/lib/ceph/cc27a71e-3fda-11ee-99e9-5254000f7c42/config directory
Enabling autotune for osd_memory_target
You can access the Ceph CLI as following in case of multi-cluster or non-default config:
sudo /usr/sbin/cephadm shell --fsid cc27a71e-3fda-11ee-99e9-5254000f7c42 -c /etc/ceph/ceph.conf -k /etc/ceph/ceph.client.admin.keyring
Or, if you are only running a single cluster on this host:
sudo /usr/sbin/cephadm shell
Please consider enabling telemetry to help improve Ceph:
ceph telemetry on
For more information see:
https://docs.ceph.com/en/latest/mgr/telemetry/
Bootstrap complete.
# enable Ceph Cli [root@node01 ~]# alias ceph='cephadm shell -- ceph' [root@node01 ~]# echo "alias ceph='cephadm shell -- ceph'" >> ~/.bash_profile
ceph -v Inferring fsid cc27a71e-3fda-11ee-99e9-5254000f7c42 Inferring config /var/lib/ceph/cc27a71e-3fda-11ee-99e9-5254000f7c42/mon.node01/config Using ceph image with id '14060fbd7be7' and tag 'v18' created on 2023-08-03 23:44:28 +0000 UTC quay.io/ceph/ceph@sha256:bffa28055a8df508962148236bcc391ff3bbf271312b2e383c6aa086c086c82c ceph version 18.2.0 (5dd24139a1eada541a3bc16b6941c5dde975e26d) reef (stable) # OK for [HEALTH_WARN] because OSDs are not added yet [root@node01 ~]# ceph -s
Inferring fsid cc27a71e-3fda-11ee-99e9-5254000f7c42
Inferring config /var/lib/ceph/cc27a71e-3fda-11ee-99e9-5254000f7c42/mon.node01/config
Using ceph image with id '14060fbd7be7' and tag 'v18' created on 2023-08-03 23:44:28 +0000 UTC
quay.io/ceph/ceph@sha256:bffa28055a8df508962148236bcc391ff3bbf271312b2e383c6aa086c086c82c
cluster:
id: cc27a71e-3fda-11ee-99e9-5254000f7c42
health: HEALTH_WARN
OSD count 0 > osd_pool_default_size 3
services:
mon: 1 daemons, quorum node01 (age 2m)
mgr: node01.lvvxbq(active, since 40s)
osd: 0 osds: 0 up, 0 in
data:
pools: 0 pools, 0 pgs
objects: 0 objects, 0 B
usage: 0 B used, 0 B / 0 B avail
pgs:
# containers are running for each service [root@node01 ~]# podman ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b56682b2ec96 quay.io/ceph/ceph:v18 -n mon.node01 -f ... 2 minutes ago Up 2 minutes ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-mon-node01 db0455103ef6 quay.io/ceph/ceph:v18 -n mgr.node01.lvv... 2 minutes ago Up 2 minutes ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-mgr-node01-lvvxbq 96b6eb87eba4 quay.io/ceph/ceph@sha256:90706e97b3abcc1902442f83f478f5eabe9ff730946f187dcb4ea82694b3870a -n client.ceph-ex... 2 minutes ago Up 2 minutes ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-ceph-exporter-node01 2b74c7bf31d4 quay.io/ceph/ceph@sha256:90706e97b3abcc1902442f83f478f5eabe9ff730946f187dcb4ea82694b3870a -n client.crash.n... 2 minutes ago Up 2 minutes ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-crash-node01 231064ecd9f3 quay.io/prometheus/node-exporter:v1.5.0 --no-collector.ti... About a minute ago Up About a minute ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-node-exporter-node01 3dec7289b325 quay.io/prometheus/prometheus:v2.43.0 --config.file=/et... About a minute ago Up About a minute ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-prometheus-node01 b22f9b967e53 quay.io/prometheus/alertmanager:v0.25.0 --cluster.listen-... About a minute ago Up About a minute ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-alertmanager-node01 7dc98a4e093f quay.io/ceph/ceph-grafana:9.4.7 /bin/bash About a minute ago Up About a minute ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42-grafana-node01 # systemd service for each containers [root@node01 ~]# systemctl status ceph-* --no-pager
* ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42@node-exporter.node01.service - Ceph node-exporter.node01 for cc27a71e-3fda-11ee-99e9-5254000f7c42
Loaded: loaded (/etc/systemd/system/ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42@.service; enabled; preset: disabled)
Active: active (running) since Mon 2023-08-21 13:26:58 JST; 2min 21s ago
Main PID: 8384 (conmon)
Tasks: 6 (limit: 23077)
Memory: 37.9M
CPU: 987ms
CGroup: /system.slice/system-ceph\x2dcc27a71e\x2d3fda\x2d11ee\x2d99e9\x2d5254000f7c42.slice/ceph-cc27a71e-3fda-11ee-99e9-5254000f7c42@node-exporter.node01.service
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