手把手教你使用rpm部署ceph集群
环境准备
1、在运行 Ceph 守护进程的节点上创建一个普通用户,ceph-deploy 会在节点安装软件包，所以你创建的用户需要无密码 sudo 权限。如果使用root可以忽略。
为赋予用户所有权限，把下列加入 /etc/sudoers.d/ceph
echo "ceph ALL = (root) NOPASSWD:ALL" | tee /etc/sudoers.d/ceph
sudo chmod 0440 /etc/sudoers.d/ceph
2、配置你的管理主机，使之可通过 SSH无密码访问各节点。
3、配置ceph源ceph.repo，这里直接配置163的源，加快安装速度
[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.163.com/ceph/rpm-mimic/el7/$basearch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.163.com/ceph/keys/release.asc
priority=1
[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.163.com/ceph/rpm-mimic/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.163.com/ceph/keys/release.asc
priority=1
[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.163.com/ceph/rpm-mimic/el7/SRPMS
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.163.com/ceph/keys/release.asc
priority=1
部署ceph相关软件与集群初始化
4、安装ceph-deploy 只需要在管理节点
sudo yum update && sudo yum install ceph-deploy
安装ceph相关软件以及依赖包
sudo ceph-deploy install qd01-stop-cloud001 qd01-stop-cloud002 qd01-stop-cloud003
注意：这里可以使用yum直接安装ceph相关包
在所有节点执行，如果执行这一步，上面的ceph-deploy install可以不用执行
sudo yum -y install ceph ceph-common rbd-fuse ceph-release python-ceph-compat python-rbd librbd1-devel ceph-radosgw
5、创建集群
sudo ceph-deploy new qd01-stop-k8s-node001 qd01-stop-k8s-node002 qd01-stop-k8s-node003
修改配置文件ceph.conf
[global]
fsid = ec7ee19a-f7c6-4ed0-9307-f48af473352c
mon_initial_members = qd01-stop-k8s-node001, qd01-stop-k8s-node002, qd01-stop-k8s-node003
mon_host = 10.26.22.105,10.26.22.80,10.26.22.85
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
cluster_network = 10.0.0.0/0
public_network = 10.0.0.0/0
filestore_xattr_use_omap = true
osd_pool_default_size = 3
osd_pool_default_min_size = 1
osd_pool_default_pg_num = 520
osd_pool_default_pgp_num = 520
osd_recovery_op_priority= 10
osd_client_op_priority = 100
osd_op_threads = 20
osd_recovery_max_active = 2
osd_max_backfills = 2
osd_scrub_load_threshold = 1
osd_deep_scrub_interval = 604800000
osd_deep_scrub_stride = 4096
[client]
rbd_cache = true
rbd_cache_size = 134217728
rbd_cache_max_dirty = 125829120
[mon]
mon_allow_pool_delete = true
注意： 在某一主机上新增 Mon 时，如果它不是由 ceph-deploy new 命令所定义的，那就必须把 public network 加入 ceph.conf 配置文件。
6、创建初始化mon
ceph-deploy mon create-initial
7、创建OSD,这里只列出一台机器的命令，多台osd替换主机名重复执行即可
初始化磁盘
ceph-deploy disk zap qd01-stop-k8s-node001 /dev/sdb
ceph-deploy disk zap qd01-stop-k8s-node001 /dev/sdc
ceph-deploy disk zap qd01-stop-k8s-node001 /dev/sdd
创建并激活
ceph-deploy osd create --data /dev/sdb qd01-stop-k8s-node001
ceph-deploy osd create --data /dev/sdc qd01-stop-k8s-node001
ceph-deploy osd create --data /dev/sdd qd01-stop-k8s-node001
8、创建管理主机
ceph-deploy mgr create qd01-stop-k8s-node001 qd01-stop-k8s-node002 qd01-stop-k8s-node003
验证ceph集群状态
9、查看集群状态
[root@qd01-stop-k8s-node001 ~]# ceph -s
cluster:
id: ec7ee19a-f7c6-4ed0-9307-f48af473352c
health: HEALTH_OK
services:
mon: 3 daemons, quorum qd01-stop-k8s-node002,qd01-stop-k8s-node003,qd01-stop-k8s-node001
mgr: qd01-stop-k8s-node001(active), standbys: qd01-stop-k8s-node002, qd01-stop-k8s-node003
osd: 24 osds: 24 up, 24 in
data:
pools: 1 pools, 256 pgs
objects: 5 objects, 325 B
usage: 24 GiB used, 44 TiB / 44 TiB avail
pgs: 256 active+clean
10、开启mgr dashboard
ceph mgr module enable dashboard
ceph dashboard create-self-signed-cert
ceph dashboard set-login-credentials admin admin
ceph mgr services
ceph config-key put mgr/dashboard/server_addr 0.0.0.0 绑定IP
ceph config-key put mgr/dashboard/server_port 7000 设置端口
systemctl restart ceph-mgr@qd01-stop-k8s-node001.service
11、创建pool
创建
ceph osd pool create k8s 256 256
允许rbd使用pool
ceph osd pool application enable k8s rbd --yes-i-really-mean-it
查看
ceph osd pool ls
12、测试
[root@qd01-stop-k8s-node001 ~]# rbd create docker_test --size 4096 -p k8s
[root@qd01-stop-k8s-node001 ~]# rbd info docker_test -p k8s
rbd image 'docker_test':
size 4 GiB in 1024 objects
order 22 (4 MiB objects)
id: 11ed6b8b4567
block_name_prefix: rbd_data.11ed6b8b4567
format: 2
features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
op_features:
flags:
create_timestamp: Wed Nov 11 17:19:38 2020
卸载
13、删除节点并删除ceph包
ceph-deploy purgedata qd01-stop-k8s-node008
ceph-deploy purge qd01-stop-k8s-node008
ceph集群相关操作命令
**健康检查**
ceph -s –conf /etc/ceph/ceph.conf –name client.admin –keyring /etc/ceph/ceph.client.admin.keyring
ceph health
ceph quorum_status –format json-pretty
ceph osd dump
ceph osd stat
ceph mon dump
ceph mon stat
ceph mds dump
ceph mds stat
ceph pg dump
ceph pg stat
**osd/pool**
ceph osd tree
ceph osd pool ls detail
ceph osd pool set rbd crush_ruleset 1
ceph osd pool create sata-pool 256 rule-sata
ceph osd pool create ssd-pool 256 rule-ssd
ceph osd pool set data min_size 2
**配置相关**
ceph daemon osd.0 config show (在osd节点上执行)
ceph daemon osd.0 config set mon_allow_pool_delete true（在osd节点执行，重启后失效）
ceph tell osd.0 config set mon_allow_pool_delete false （任意节点执行，重启后失效）
ceph config set osd.0 mon_allow_pool_delete true(只支持13.x版本，任意节点执行，重启有效,要求配置选项不在配置配置文件中，否则mon会忽略该设置）
**日志相关**
ceph log last 100
map
ceph osd map
ceph pg dump
ceph pg map x.yz
ceph pg x.yz query
**验证**
ceph auth get client.admin –name mon. –keyring /var/lib/ceph/mon/ceph-$hostname/keyring
ceph auth get osd.0
ceph auth get mon.
ceph auth ls
**crush相关**
ceph osd crush add-bucket root-sata root
ceph osd crush add-bucket ceph-1-sata host
ceph osd crush add-bucket ceph-2-sata host
ceph osd crush move ceph-1-sata root=root-sata
ceph osd crush move ceph-2-sata root=root-sata
ceph osd crush add osd.0 2 host=ceph-1-sata
ceph osd crush add osd.1 2 host=ceph-1-sata
ceph osd crush add osd.2 2 host=ceph-2-sata
ceph osd crush add osd.3 2 host=ceph-2-sata
ceph osd crush add-bucket root-ssd root
ceph osd crush add-bucket ceph-1-ssd host
ceph osd crush add-bucket ceph-2-ssd host
ceph osd getcrushmap -o /tmp/crush
crushtool -d /tmp/crush -o /tmp/crush.txt
update /tmp/crush.txt
crushtool -c /tmp/crush.txt -o /tmp/crush.bin
ceph osd setcrushmap -i /tmp/crush.bin
