025-Cinder服务-->安装并配置一个本地存储节点（ISCSI）

一：Cinder提供块级别的存储服务，块存储提供一个基础设施为了管理卷，以及和OpenStack计算服务交互，为实例提供卷。此服务也会激活管理卷的快照和卷类型的功能，块存储服务通常包含下列组件：
cinder-api：接受API请求，并将其路由到“cinder-volume“执行，即请求cinder要先请求此对外API。
cinder-volume：与块存储服务和例如“cinder-scheduler“的进程进行直接交互。它也可以与这些进程通过一个消息队列进行交互。“cinder-volume“服务响应送到块存储服务的读写请求来维持状态。它也可以和多种存储提供者在驱动架构下进行交互。
cinder-scheduler守护进程：选择最优存储提供节点来创建卷。其与“nova-scheduler“组件类似。
cinder-backup守护进程：“cinder-backup“服务提供任何种类备份卷到一个备份存储提供者。就像“cinder-volume“服务，它与多种存储提供者在驱动架构下进行交互。
消息队列：在块存储的进程之间路由信息。

怎样为块存储服务安装并配置存储节点。为简单起见，这里配置一个有一个空的本地块存储设备的存储节点。这个向导用的是 /dev/sdb，此处选用linux-node1节点作为存储节点，需要在vmware中添加一块磁盘。

Cinder ：本身不是存储软件，是管理后端存储用的
配置控制节点，
mysql -u root -p
MariaDB [(none)]> CREATE DATABASE cinder;

GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'localhost' IDENTIFIED BY 'cinder';
GRANT ALL PRIVILEGES ON cinder.* TO 'cinder'@'%' IDENTIFIED BY 'cinder';

openstack user create --domain default --password-prompt cinder
openstack role add --project service --user cinder admin

openstack service create --name cinderv2 --description "OpenStack Block Storage" volumev2
openstack service create --name cinderv3 --description "OpenStack Block Storage" volumev3

openstack endpoint create --region RegionOne volumev2 public http://192.168.1.230:8776/v2/%(project_id)s
openstack endpoint create --region RegionOne volumev2 internal http://192.168.1.230:8776/v2/%(project_id)s
openstack endpoint create --region RegionOne volumev2 admin http://192.168.1.230:8776/v2/%(project_id)s
openstack endpoint create --region RegionOne volumev3 public http://192.168.1.230:8776/v3/%(project_id)s
openstack endpoint create --region RegionOne volumev3 internal http://192.168.1.230:8776/v3/%(project_id)s
openstack endpoint create --region RegionOne volumev3 admin http://192.168.1.230:8776/v3/%(project_id)s

如报错：Multiple service matches found for 'volumev2', use an ID to be more specific.
则如下：
[root@linux-node1 ~]# openstack service list
+----------------------------------+-----------+-----------+
| ID | Name | Type |
+----------------------------------+-----------+-----------+
| 02180476df5840809d26655ba09b76e3 | cinderv2 | volumev2 |
| 1ae8fbe0cd164f6ab72ab1a9ec954631 | cinderv2 | volumev2 |
| 44bee342cbb341cca16840ff6f9bff85 | cinderv3 | volumev3 |
| 6ac06360d9b0464fbc811ea12d4ae848 | glance | image |
| 6b840f69965e43ad94813be38b56a6de | neutron | network |
| 929cbc7c7b264ad08d098409ad8dbab7 | placement | placement |
| 94b62aab1fde462583ec57c0becacb6f | keystone | identity |
| ab62662d8f734cadaf96f86b6dad4a8b | nova | compute |
| d2ab86cdf41347a2bc635036ead19204 | cinderv3 | volumev3 |
+----------------------------------+-----------+-----------+
[root@linux-node1 ~]# openstack service delete 02180476df5840809d26655ba09b76e3
[root@linux-node1 ~]# openstack service delete 1ae8fbe0cd164f6ab72ab1a9ec954631
[root@linux-node1 ~]# openstack service delete 44bee342cbb341cca16840ff6f9bff85
[root@linux-node1 ~]# openstack service delete d2ab86cdf41347a2bc635036ead19204
[root@linux-node1 ~]# openstack service list
+----------------------------------+-----------+-----------+
| ID | Name | Type |
+----------------------------------+-----------+-----------+
| 6ac06360d9b0464fbc811ea12d4ae848 | glance | image |
| 6b840f69965e43ad94813be38b56a6de | neutron | network |
| 929cbc7c7b264ad08d098409ad8dbab7 | placement | placement |
| 94b62aab1fde462583ec57c0becacb6f | keystone | identity |
| ab62662d8f734cadaf96f86b6dad4a8b | nova | compute |
+----------------------------------+-----------+-----------+

yum install openstack-cinder

[root@linux-node1 ~]# cat /etc/cinder/cinder.conf | grep -v "#" | grep -v "^$"
[DEFAULT]
transport_url = rabbit://openstack:openstack@192.168.1.230
auth_strategy = keystone
[backend]
[backend_defaults]
[barbican]
[brcd_fabric_example]
[cisco_fabric_example]
[coordination]
[cors]
[database]
connection = mysql+pymysql://cinder:cinder@192.168.1.230/cinder
[fc-zone-manager]
[healthcheck]
[key_manager]
[keystone_authtoken]
auth_uri = http://192.168.1.230:5000
auth_url = http://192.168.1.230:35357
memcached_servers = 192.168.1.230:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = cinder
password = cinder
[matchmaker_redis]
[nova]
[oslo_concurrency]
lock_path = /var/lib/cinder/tmp
[oslo_messaging_amqp]
[oslo_messaging_kafka]
[oslo_messaging_notifications]
[oslo_messaging_rabbit]
[oslo_messaging_zmq]
[oslo_middleware]
[oslo_policy]
[oslo_reports]
[oslo_versionedobjects]
[profiler]
[ssl]

su -s /bin/sh -c "cinder-manage db sync" cinder

配置计算服务使用cinder
vim /etc/nova/nova.conf
[cinder]
os_region_name = RegionOne

systemctl restart openstack-nova-api.service
systemctl enable openstack-cinder-api.service openstack-cinder-scheduler.service
systemctl start openstack-cinder-api.service openstack-cinder-scheduler.service

[root@linux-node1 ~]# tail -f /var/log/cinder/api.log
2019-07-11 09:59:17.727 20055 INFO cinder.api.extensions [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] Loaded extension: os-volume-transfer
2019-07-11 09:59:17.727 20055 INFO cinder.api.extensions [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] Loaded extension: os-volume-type-access
2019-07-11 09:59:17.728 20055 INFO cinder.api.extensions [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] Loaded extension: encryption
2019-07-11 09:59:17.730 20055 INFO cinder.api.extensions [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] Loaded extension: os-volume-unmanage
2019-07-11 09:59:17.907 20055 INFO oslo.service.wsgi [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] osapi_volume listening on 0.0.0.0:8776
2019-07-11 09:59:17.908 20055 INFO oslo_service.service [req-10d244f1-d517-4c00-89f5-b6b9bd4dba9c - - - - -] Starting 4 workers
2019-07-11 09:59:18.124 20088 INFO eventlet.wsgi.server [-] (20088) wsgi starting up on http://0.0.0.0:8776
2019-07-11 09:59:18.165 20089 INFO eventlet.wsgi.server [-] (20089) wsgi starting up on http://0.0.0.0:8776
2019-07-11 09:59:18.344 20090 INFO eventlet.wsgi.server [-] (20090) wsgi starting up on http://0.0.0.0:8776
2019-07-11 09:59:18.377 20091 INFO eventlet.wsgi.server [-] (20091) wsgi starting up on http://0.0.0.0:8776

监听在8776

配置存储节点：
只要在一台机器上装上cinder-volume 就是存储节点
没有cinder的时候 存在本地硬盘如下路径：存在本地硬盘的优势是：性能好，因为存在别的机器，首先要经过网络传输，劣势是：不灵活，比如迁移
[root@linux-node2 ~]# cd /var/lib/nova/
[root@linux-node2 nova]# ls
buckets instances keys networks tmp
[root@linux-node2 nova]# cd instances/
[root@linux-node2 instances]# ls
_base compute_nodes locks
[root@linux-node2 instances]# tree

官方默认用iscsi：就是通过网络封装将数据传输，但和NFS不一样，NFS穿的是文件，iscsi传的是块
该服务使用LVM驱动程序在此设备上配置逻辑卷， 并通过iSCSI传输将它们提供给实例。您可以按照这些说明进行微小修改，以使用其他存储节点水平扩展您的环境。

本案例装在控制节点上：

yum install lvm2 device-mapper-persistent-data
注：要将cinder-volume 和lvm ，iscsi 装在一台机器上，因为cinder-volume 要管理lvm和iscsi

systemctl enable lvm2-lvmetad.service
systemctl start lvm2-lvmetad.service

Create the LVM physical volume /dev/sdb:如下
添加磁盘后验证是否有sdb：
[root@linux-node1 ~]# fdisk -l

磁盘 /dev/sdb：26.8 GB, 26843545600 字节，52428800 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节

磁盘 /dev/sda：21.5 GB, 21474836480 字节，41943040 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0x000c3d86

设备 Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM

磁盘 /dev/mapper/centos-root：18.2 GB, 18249416704 字节，35643392 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节

磁盘 /dev/mapper/centos-swap：2147 MB, 2147483648 字节，4194304 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节

[root@linux-node1 ~]# pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created.
[root@linux-node1 ~]# vgcreate cinder-volumes /dev/sdb
Volume group "cinder-volumes" successfully created
[root@linux-node1 ~]# vgdisplay #验证是否创建成功
--- Volume group ---
VG Name cinder-volumes
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size <25.00 GiB
PE Size 4.00 MiB
Total PE 6399
Alloc PE / Size 0 / 0
Free PE / Size 6399 / <25.00 GiB
VG UUID yNfh0o-3HwS-tUnt-KOfv-CjSf-Bisa-bZuN2f

--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <19.00 GiB
PE Size 4.00 MiB
Total PE 4863
Alloc PE / Size 4863 / <19.00 GiB
Free PE / Size 0 / 0
VG UUID chtJNI-2SnD-3lRy-YJR2-lC4B-kwdn-xOmThi

vim /etc/lvm/lvm.conf
devices {
filter = [ "a/sdb/", "r/.*/"]

如果存储节点在操作系统磁盘上使用LVM，则还必须将关联的设备添加到过滤器。例如，如果/dev/sda设备包含操作系统：如果存储节点和控制节点在一起则替换掉上面的filter为下：
filter = [ "a/sda/", "a/sdb/", "r/.*/"]

同样，如果计算节点在操作系统磁盘上使用LVM，则还必须修改/etc/lvm/lvm.conf这些节点上的文件中的过滤器 以仅包括操作系统磁盘。例如，如果/dev/sda 设备包含操作系统：
filter = [ "a/sda/", "r/.*/"]

yum install openstack-cinder targetcli python-keystone
注：targetcli 是管理iscsi的

vim /etc/cinder/cinder.conf
[database]
connection = mysql+pymysql://cinder:cinder@192.168.1.230/cinder
[DEFAULT]
transport_url = rabbit://openstack:RABBIT_PASS@192.168.1.230
auth_strategy = keystone
enabled_backends = lvm ###后端存储启动lvm，lvm这个名字是任意，是对应上面的[lvm] 的名字，就是[ ]里写的什么，这里就填什么
glance_api_servers = http://192.168.1.230:9292
[keystone_authtoken]
auth_uri = http://192.168.1.230:5000
auth_url = http://192.168.1.230:35357
memcached_servers = 192.168.1.230:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = cinder
password = cinder

[lvm]
volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
volume_group = cinder-volumes
iscsi_protocol = iscsi
iscsi_helper = lioadm ####iscsi的管理工具是使用lioadm

[oslo_concurrency]
lock_path = /var/lib/cinder/tmp

[root@linux-node1 ~]# cat /etc/cinder/cinder.conf | grep -v "#" | grep -v "^$"
[DEFAULT]
transport_url = rabbit://openstack:openstack@192.168.1.230
auth_strategy = keystone
enabled_backends = lvm
glance_api_servers = http://192.168.1.230:9292
iscsi_ip_address = 192.168.1.230
[backend]
[backend_defaults]
[barbican]
[brcd_fabric_example]
[cisco_fabric_example]
[coordination]
[cors]
[database]
connection = mysql+pymysql://cinder:cinder@192.168.1.230/cinder
[fc-zone-manager]
[healthcheck]
[key_manager]
[keystone_authtoken]
auth_uri = http://192.168.1.230:5000
auth_url = http://192.168.1.230:35357
memcached_servers = 192.168.1.230:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = cinder
password = cinder
[matchmaker_redis]
[nova]
[oslo_concurrency]
lock_path = /var/lib/cinder/tmp
[oslo_messaging_amqp]
[oslo_messaging_kafka]
[oslo_messaging_notifications]
[oslo_messaging_rabbit]
[oslo_messaging_zmq]
[oslo_middleware]
[oslo_policy]
[oslo_reports]
[oslo_versionedobjects]
[profiler]
[ssl]
[lvm]
volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
volume_group = cinder-volumes
iscsi_protocol = iscsi
iscsi_helper = lioadm

systemctl enable openstack-cinder-volume.service target.service
systemctl start openstack-cinder-volume.service target.service

ps aux | grep cinder

[root@linux-node1 ~]# openstack volume service list
+------------------+-----------------+------+---------+-------+----------------------------+
| Binary | Host | Zone | Status | State | Updated At |
+------------------+-----------------+------+---------+-------+----------------------------+
| cinder-scheduler | linux-node1 | nova | enabled | up | 2019-07-11T15:23:03.000000 |
| cinder-volume | linux-node1@lvm | nova | enabled | up | 2019-07-11T15:23:03.000000 |
+------------------+-----------------+------+---------+-------+----------------------------+

Install and configure the backup service

• 6.创建云硬盘并挂载

（1）打开dashboard，进入卷，点击"创建卷"

（2）将卷加入到云主机中，"编辑卷"-->"管理连接"-->"链接云主机"

（3）进入云主机进行查看磁盘挂载情况
fdisk -l，成功挂载1G的云硬盘，对该磁盘进行格式化，并写入数据

tips：当有多个节点需要挂载该云盘，需要将该磁盘进行umount，再到"管理连接"-->"分离卷"。分离卷时，该磁盘数据不会丢失。挂到其他云主机时，不再需要格式化，直接可挂载。

存储节点可选用的存储类型
1.使用本地硬盘
2.系统使用本地硬盘+云硬盘（数据盘） ISCSI NFS GlusterFS Ceph

创建卷 --> 编辑卷 --> 分给虚拟机 --> 虚拟机查看是否加载 --> mkfs.xfs /dev/vdc --> mount /dev/vdc /data2/
注：在使用中这个云硬盘是不可以删的，要是将云硬盘挂载到其他虚拟机则要在原虚拟机先umount --> 然后分离卷，然后在挂载到新的上面，并且新虚拟机可以直接使用云硬盘里的数据

1.使用本地硬盘
2.系统使用本地硬盘 + 云硬盘（数据盘） ISCSI NFS ClusterFS Ceph，生产环境用后面两个

在上面当中，数据文件都保存在服务器本地，以下将介绍如何使用NFS共享作为Openstack后端存储