Docker实战-ISCSI
基于docker实现iscsi
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环境准备:
主机:VMware VM (Linux :CentOS 7.5 )
网络:VM 可以访问公网 (NAT)
共享硬盘:/dev/sdb(宿主机准备一块硬盘提供iscsi容器使用,作为共享硬盘)
软件要求:安装docker;iscsi-initiator-utils(iscsi客户端软件)
Docker安装
1、 使用官方安装脚本自动安装
#curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
2、启动 Docker 服务
#systemctl start docker
3、确认docker 组件已经启动
# ps aux | grep docker
root 11568 0.1 3.0 661408 56004 ? Ssl 08:44 0:54 /usr/bin/dockerd -H fd:// --
containerd=/run/containerd/containerd.sock
iSCSI简介
iSCSI(Internet Small Computer System Interface,Internet 小型计算机系统接口)是一种由IBM公司研究开发的IP SAN技术,该技术是将现有SCSI接口与以太网络(Ethernet)技术结合,基于 TCP/IP的协议连接iSCSI服务端(Target)和客户端(Initiator),使得封装后的SCSI数据包可以通用互联网传输,最终实现iSCSI服务端映射为一个存储空间(磁盘)提供给已连接认证后的客户端。
iSCSI服务端称为Target,访问的客户端应用称为Initiator。
下载iSCSI镜像
1、下载iSCSI docker 镜像
#docker pull wtnb75/stgt
**2、确认 iSCSI docker 镜像存在于本地 **
#docker images
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu 14.04 13b66b487594 7 months ago 197MB
wtnb75/stgt latest acb56e1844e0 3 years ago 8.31MB
dreamcat4/iscsi latest 99b5f61483ed 4 years ago 326MB
aosqe/iscsi latest 1d1aa0a7ba73 5 years ago 386MB
启动iSCSI容器
docker run \
--detach \
--name stgt \
--restart=unless-stopped \
--net host \
--privileged \
--volume /etc/target:/etc/target \
--volume /run/lvm:/run/lvm \
--volume /lib/modules:/lib/modules \
--volume /sys/kernel/config:/sys/kernel/config \
--volume /dev:/dev \
-p 3260:3260 \
wtnb75/stgt
查看iSCSI容器运行状态
**检查iSCSI docker 运行状态 **
#docker ps
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
26e6d34ff4af wtnb75/stgt "tgtd -f" 30 minutes ago Up 30 minutes stgt
iSCSI容器创建共享硬盘
1、创建target
#docker exec stgt tgtadm --mode target --op new --tid 1 --targetname iqn.2017-04.com.comsys:iscsi.fcdisk
2、创建lun
#docker exec stgt tgtadm --mode logicalunit --op new --tid 1 --lun 1 --backing-store /dev/sdb1
3、授权
#docker exec stgt tgtadm --mode target --op bind --tid 1 --initiator-address 192.168.234.0/24
#docker exec stgt tgtadm --mode target --op bind --tid 1 --initiator-address 172.17.0.0/24
4、查看已经定义的信息
#docker exec stgt tgtadm --mode target --op show
[root@localhost ~]# docker exec stgt tgtadm --mode target --op show
Target 1: iqn.2017-04.com.comsys:iscsi.fcdisk
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
............................
LUN: 1
Type: disk
SCSI ID: IET 00010001
SCSI SN: beaf11
Size: 5368 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
SWP: No
Thin-provisioning: No
Backing store type: rdwr
Backing store path: /dev/sdb1
Backing store flags:
Account information:
ACL information:
192.168.234.0/24
172.17.0.0/24
iSCSI客户端发现并登录存储
1、安装客户端软件
[root@localhost ~]# yum install iscsi-initiator-utils
2、启动iSCSI服务
[root@localhost ~]#service iscsi start;service iscsid start
3、发现iSCSI存储
[root@localhost ~]# iscsiadm -m discovery -t st -p 192.168.234.128
192.168.234.128:3260,1 iqn.2017-04.com.comsys:iscsi.fcdisk
4、登录iSCSI存储
[root@localhost ~]# iscsiadm -m node -d -T iqn.2017-04.com.comsys:iscsi.fcdisk -p 192.168.234.128 -l
Logging in to [iface: default, target: iqn.2017-04.com.comsys:iscsi.fcdisk, portal: 192.168.234.128,3260] (multiple)
Login to [iface: default, target: iqn.2017-04.com.comsys:iscsi.fcdisk, portal: 192.168.234.128,3260] successful.
5、查看共享硬盘
[root@localhost ~]# fdisk -l
Disk /dev/sda: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0000959b
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 616447 307200 83 Linux
/dev/sda2 616448 2713599 1048576 82 Linux swap / Solaris
/dev/sda3 2713600 20971519 9128960 83 Linux
Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xbdecb11b
Device Boot Start End Blocks Id System
/dev/sdb1 2048 10485759 5241856 83 Linux
Disk /dev/sdc: 5367 MB, 5367660544 bytes, 10483712 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
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