在CentOS 7上搭建Docker环境

 
Preface
 
    We commonly use VMware or VirtualBox to install our Virtual Machines before.For the sake of creating a simple testing environment with less resources.I consider to implement a MySQL db server relies on docker which can help you saving your time when developing code or something else.
 
Introduce
 
    What's docker?There're two concept you should first try to understand,image & container(like an iso file,put all kinds of different tools in it,then manage the by containner).You're supposed to package your applications(or indispensable software in your dev environment) to a container.Whenever you need a second evironment to install same softwares or dependent packages,only one thing that you migrate the image to it is neccessary.It's rather simple and efficient by using docker.
 
Procedure
 
    Let's install docker and then implement a MySQL server on it,here we go.
 
  1 ###Create a docker host named "docker" by vagrant.###
  2 $ vagrant up docker
  3 Bringing machine 'docker' up with 'virtualbox' provider...
  4 ==> docker: Importing base box 'CentOS7'...
  5 Progress: 30%
  6 ==> docker: Matching MAC address for NAT networking...
  7 ==> docker: Setting the name of the VM: Vagrant_docker_1529333111553_95525
  8 ==> docker: Clearing any previously set forwarded ports...
  9 ==> docker: Clearing any previously set network interfaces...
 10 ==> docker: Preparing network interfaces based on configuration...
 11     docker: Adapter 1: nat
 12     docker: Adapter 2: hostonly
 13 ==> docker: Forwarding ports...
 14     docker: 22 (guest) => 2222 (host) (adapter 1)
 15 ==> docker: Running 'pre-boot' VM customizations...
 16 ==> docker: Booting VM...
 17 ==> docker: Waiting for machine to boot. This may take a few minutes...
 18     docker: SSH address: 127.0.0.1:2222
 19     docker: SSH username: vagrant
 20     docker: SSH auth method: private key
 21     docker:
 22     docker: Vagrant insecure key detected. Vagrant will automatically replace
 23     docker: this with a newly generated keypair for better security.
 24     docker:
 25     docker: Inserting generated public key within guest...
 26     docker: Removing insecure key from the guest if it's present...
 27     docker: Key inserted! Disconnecting and reconnecting using new SSH key...
 28 ==> docker: Machine booted and ready!
 29 ==> docker: Checking for guest additions in VM...
 30     docker: The guest additions on this VM do not match the installed version of
 31     docker: VirtualBox! In most cases this is fine, but in rare cases it can
 32     docker: prevent things such as shared folders from working properly. If you see
 33     docker: shared folder errors, please make sure the guest additions within the
 34     docker: virtual machine match the version of VirtualBox you have installed on
 35     docker: your host and reload your VM.
 36     docker:
 37     docker: Guest Additions Version: 4.3.28
 38     docker: VirtualBox Version: 5.1
 39 ==> docker: Setting hostname...
 40 ==> docker: Configuring and enabling network interfaces...
 41     docker: SSH address: 127.0.0.1:2222
 42     docker: SSH username: vagrant
 43     docker: SSH auth method: private key
 44 ==> docker: Mounting shared folders...
 45     docker: /vagrant => E:/Vagrant
 46 
 47 [root@docker ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
 48 -- Omitted.
 49 
 50 Installed:
 51   yum-utils.noarch 0:1.1.31-45.el7                                                                                                                   
 52 
 53 Dependency Installed:
 54   libxml2-python.x86_64 0:2.9.1-6.el7_2.3            python-chardet.noarch 0:2.2.1-1.el7_1            python-kitchen.noarch 0:1.1.1-5.el7           
 55 
 56 Updated:
 57   device-mapper-persistent-data.x86_64 0:0.7.3-3.el7                                   lvm2.x86_64 7:2.02.177-4.el7                                  
 58 
 59 Dependency Updated:
 60   device-mapper.x86_64 7:1.02.146-4.el7          device-mapper-event.x86_64 7:1.02.146-4.el7     device-mapper-event-libs.x86_64 7:1.02.146-4.el7    
 61   device-mapper-libs.x86_64 7:1.02.146-4.el7     libxml2.x86_64 0:2.9.1-6.el7_2.3                lvm2-libs.x86_64 7:2.02.177-4.el7                   
 62   python-urlgrabber.noarch 0:3.10-8.el7          rpm.x86_64 0:4.11.3-32.el7                      rpm-build-libs.x86_64 0:4.11.3-32.el7               
 63   rpm-libs.x86_64 0:4.11.3-32.el7                rpm-python.x86_64 0:4.11.3-32.el7               yum.noarch 0:3.4.3-158.el7.centos
 64 
 65 ###Add repo of docker of aliyun.###
 66 [root@docker ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 67 Loaded plugins: fastestmirror
 68 adding repo from: http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 69 grabbing file http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
 70 repo saved to /etc/yum.repos.d/docker-ce.repo
 71 [root@docker ~]# 
 72 
 73 ###Create metadata cache.###
 74 [root@docker ~]# yum makecache fast
 75 Loaded plugins: fastestmirror
 76 base                                                                                                                          | 3.6 kB  00:00:00     
 77 docker-ce-stable                                                                                                              | 2.9 kB  00:00:00     
 78 extras                                                                                                                        | 3.4 kB  00:00:00     
 79 updates                                                                                                                       | 3.4 kB  00:00:00     
 80 docker-ce-stable/x86_64/primary_db                                                                                            |  13 kB  00:00:00     
 81 Loading mirror speeds from cached hostfile
 82  * base: mirrors.shu.edu.cn
 83  * extras: ftp.sjtu.edu.cn
 84  * updates: mirrors.shu.edu.cn
 85 Metadata Cache Created
 86 
 87 ###Install docker from repo.###
 88 [root@docker ~]# yum -y install docker-ce
 89 Loaded plugins: fastestmirror
 90 Loading mirror speeds from cached hostfile
 91  * base: mirrors.shu.edu.cn
 92  * extras: ftp.sjtu.edu.cn
 93  * updates: mirrors.shu.edu.cn
 94 Resolving Dependencies
 95 --> Running transaction check
 96 ---> Package device-mapper-persistent-data.x86_64 0:0.4.1-2.el7 will be updated
 97 ---> Package device-mapper-persistent-data.x86_64 0:0.7.3-3.el7 will be an update
 98 ---> Package lvm2.x86_64 7:2.02.115-3.el7 will be updated
 99 ---> Package lvm2.x86_64 7:2.02.177-4.el7 will be an update
100 --> Processing Dependency: lvm2-libs = 7:2.02.177-4.el7 for package: 7:lvm2-2.02.177-4.el7.x86_64
101 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_97)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
102 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_141)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
103 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_138)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
104 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_135)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
105 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_133)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
106 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_128)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
107 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_113)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
108 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_110)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
109 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_107)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
110 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_104)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
111 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_103)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
112 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_101)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
113 --> Processing Dependency: libdevmapper.so.1.02(DM_1_02_100)(64bit) for package: 7:lvm2-2.02.177-4.el7.x86_64
114 ---> Package yum-utils.noarch 0:1.1.31-45.el7 will be installed
115 
116 -- Omitted.
117 
118 Installed:
119   docker-ce.x86_64 0:18.03.1.ce-1.el7.centos -- The lastest version of docker CE is 18.03.1 
120 
121 Dependency Installed:
122   audit-libs-python.x86_64 0:2.8.1-3.el7                checkpolicy.x86_64 0:2.5-6.el7             container-selinux.noarch 2:2.55-1.el7            
123   libcgroup.x86_64 0:0.41-15.el7                        libseccomp.x86_64 0:2.3.1-3.el7            libsemanage-python.x86_64 0:2.5-11.el7           
124   libtool-ltdl.x86_64 0:2.4.2-22.el7_3                  lz4.x86_64 0:1.7.5-2.el7                   pigz.x86_64 0:2.3.3-1.el7.centos                 
125   policycoreutils-python.x86_64 0:2.5-22.el7            python-IPy.noarch 0:0.75-6.el7             setools-libs.x86_64 0:3.3.8-2.el7                
126 
127 Updated:
128   centos-release.x86_64 0:7-5.1804.el7.centos.2              dracut.x86_64 0:033-535.el7              initscripts.x86_64 0:9.49.41-1.el7             
129 
130 Dependency Updated:
131   audit.x86_64 0:2.8.1-3.el7                 audit-libs.x86_64 0:2.8.1-3.el7                 dracut-config-rescue.x86_64 0:033-535.el7               
132   dracut-network.x86_64 0:033-535.el7        glib2.x86_64 0:2.54.2-2.el7                     kmod.x86_64 0:20-21.el7                                 
133   libgudev1.x86_64 0:219-57.el7              libselinux.x86_64 0:2.5-12.el7                  libselinux-devel.x86_64 0:2.5-12.el7                    
134   libselinux-python.x86_64 0:2.5-12.el7      libselinux-ruby.x86_64 0:2.5-12.el7             libselinux-utils.x86_64 0:2.5-12.el7                    
135   libsemanage.x86_64 0:2.5-11.el7            libsepol.x86_64 0:2.5-8.1.el7                   libsepol-devel.x86_64 0:2.5-8.1.el7                     
136   policycoreutils.x86_64 0:2.5-22.el7        selinux-policy.noarch 0:3.13.1-192.el7_5.3      selinux-policy-targeted.noarch 0:3.13.1-192.el7_5.3     
137   systemd.x86_64 0:219-57.el7                systemd-libs.x86_64 0:219-57.el7                systemd-sysv.x86_64 0:219-57.el7                        
138 
139 Complete!
140 
141 ###Check docker detail version.###
142 [root@docker ~]# docker version
143 Client:
144  Version:      18.03.1-ce
145  API version:  1.37
146  Go version:   go1.9.5
147  Git commit:   9ee9f40
148  Built:        Thu Apr 26 07:20:16 2018
149  OS/Arch:      linux/amd64
150  Experimental: false
151  Orchestrator: swarm
152 Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
153 [root@docker ~]# 
154 
155 ###Create a docker daemon config file.###
156 [root@docker docker]# pwd
157 /etc/docker
158 [root@docker docker]# vim daemon.json
159 [root@docker docker]# cat daemon.json 
160 {
161 "registry-mirrors": [ "https://registry.docker-cn.com"]
162 }
163 
164 ###Start docker service and list infomations.###
165 [root@docker docker]# systemctl start docker
166 [root@docker docker]# docker info
167 Containers: 0
168  Running: 0
169  Paused: 0
170  Stopped: 0
171 Images: 0
172 Server Version: 18.03.1-ce
173 Storage Driver: devicemapper
174  Pool Name: docker-253:0-16777839-pool
175  Pool Blocksize: 65.54kB
176  Base Device Size: 10.74GB
177  Backing Filesystem: xfs
178  Udev Sync Supported: true
179  Data file: /dev/loop0
180  Metadata file: /dev/loop1
181  Data loop file: /var/lib/docker/devicemapper/devicemapper/data
182  Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
183  Data Space Used: 11.8MB
184  Data Space Total: 107.4GB
185  Data Space Available: 7.6GB
186  Metadata Space Used: 581.6kB
187  Metadata Space Total: 2.147GB
188  Metadata Space Available: 2.147GB
189  Thin Pool Minimum Free Space: 10.74GB
190  Deferred Removal Enabled: true
191  Deferred Deletion Enabled: true
192  Deferred Deleted Device Count: 0
193  Library Version: 1.02.146-RHEL7 (2018-01-22)
194 Logging Driver: json-file
195 Cgroup Driver: cgroupfs
196 Plugins:
197  Volume: local
198  Network: bridge host macvlan null overlay
199  Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
200 Swarm: inactive
201 Runtimes: runc
202 Default Runtime: runc
203 Init Binary: docker-init
204 containerd version: 773c489c9c1b21a6d78b5c538cd395416ec50f88
205 runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
206 init version: 949e6fa
207 Security Options:
208  seccomp
209   Profile: default
210 Kernel Version: 3.10.0-229.el7.x86_64
211 Operating System: CentOS Linux 7 (Core)
212 OSType: linux
213 Architecture: x86_64
214 CPUs: 1
215 Total Memory: 993.6MiB
216 Name: docker
217 ID: 4GY3:Q2FL:P4DD:HOFN:WFJZ:RDAV:GMJA:RDFF:VTAS:VW6D:TSC6:LCSC
218 Docker Root Dir: /var/lib/docker
219 Debug Mode (client): false
220 Debug Mode (server): false
221 Registry: https://index.docker.io/v1/
222 Labels:
223 Experimental: false
224 Insecure Registries:
225  127.0.0.0/8
226 Registry Mirrors:
227  https://registry.docker-cn.com/
228 Live Restore Enabled: false
229 
230 WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
231          Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
232 WARNING: bridge-nf-call-iptables is disabled
233 WARNING: bridge-nf-call-ip6tables is disabled
234 
235 ###Load image of CentOS7.###
236 [root@docker docker]# docker image
237 
238 Usage:    docker image COMMAND
239 
240 Manage images
241 
242 Options:
243 
244 
245 Commands:
246   build       Build an image from a Dockerfile
247   history     Show the history of an image
248   import      Import the contents from a tarball to create a filesystem image
249   inspect     Display detailed information on one or more images
250   load        Load an image from a tar archive or STDIN
251   ls          List images
252   prune       Remove unused images
253   pull        Pull an image or a repository from a registry
254   push        Push an image or a repository to a registry
255   rm          Remove one or more images
256   save        Save one or more images to a tar archive (streamed to STDOUT by default)
257   tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
258 
259 Run 'docker image COMMAND --help' for more information on a command.
260 [root@docker docker]# docker images
261 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
262 [root@docker docker]# cd /vagrant
263 [root@docker vagrant]# ls -l
264 total 1887022
265 -rwxrwxrwx 1 vagrant vagrant 498180608 Mar 13 16:19 centos-7.0-x86_64.box
266 -rwxrwxrwx 1 vagrant vagrant     15080 Mar 21 18:42 epel-release-latest-7.noarch.rpm
267 drwxrwxrwx 1 vagrant vagrant      4096 Mar 18 16:42 masterha
268 -rwxrwxrwx 1 vagrant vagrant     87119 Nov  7  2014 mha4mysql-manager-0.56-0.el6.noarch.rpm
269 -rwxrwxrwx 1 vagrant vagrant    113914 Nov  7  2014 mha4mysql-manager-0.56.tar.gz
270 -rwxrwxrwx 1 vagrant vagrant    118521 Mar 11 18:36 mha4mysql-manager-0.57.tar.gz
271 -rwxrwxrwx 1 vagrant vagrant     36326 Nov  7  2014 mha4mysql-node-0.56-0.el6.noarch.rpm
272 -rwxrwxrwx 1 vagrant vagrant     50172 Nov  4  2014 mha4mysql-node-0.56.tar.gz
273 -rwxrwxrwx 1 vagrant vagrant     54484 Mar 11 18:36 mha4mysql-node-0.57.tar.gz
274 drwxrwxrwx 1 vagrant vagrant      4096 Jun  2 16:23 MyFlash-master
275 -rwxrwxrwx 1 vagrant vagrant   2339403 Jun  1 16:15 MyFlash-master.zip
276 drwxrwxrwx 1 vagrant vagrant      8192 May  3 17:22 MySQL
277 -rwxrwxrwx 1 vagrant vagrant 641798603 Mar 18 14:32 mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
278 drwxrwxrwx 1 vagrant vagrant      4096 Jun  8 15:57 mysqlbinlog_flashback-master
279 -rwxrwxrwx 1 vagrant vagrant    299829 Jun  8 15:41 mysqlbinlog_flashback-master.zip
280 -rwxrwxrwx 1 vagrant vagrant   4720640 Jun  8 16:57 pip-10.0.1.tar
281 -rwxrwxrwx 1 vagrant vagrant     74297 Jun  8 17:06 PyMySQL-0.8.1.tar.gz
282 -rwxrwxrwx 1 vagrant vagrant  59238400 Jun  8 16:17 Python-2.6.9.tar
283 drwxrwxrwx 1 vagrant vagrant      4096 Jun  8 17:18 setuptools-39.2.0
284 -rwxrwxrwx 1 vagrant vagrant    851112 Jun  8 17:17 setuptools-39.2.0.zip
285 -rwxrwxrwx 1 vagrant vagrant      4140 Jun 18 16:43 Vagrantfile
286 -rwxrwxrwx 1 vagrant vagrant    540672 Apr 19 14:21 zabbix-3.0.16.tar.gz
287 -rwxrwxrwx 1 vagrant vagrant 723758592 Jun 13 17:08 zst_centos7-201806.tar
288 [root@docker vagrant]# docker image load < zst_centos7-201806.tar 
289 129b697f70e9: Loading layer [==================================================>]  205.1MB/205.1MB
290 e17a43dfd99e: Loading layer [==================================================>]  20.09MB/20.09MB
291 81230abc4426: Loading layer [==================================================>]  2.802MB/2.802MB
292 a70f1502766b: Loading layer [==================================================>]  3.584kB/3.584kB
293 4c4dfc844006: Loading layer [==================================================>]  6.656kB/6.656kB
294 49fde8c22696: Loading layer [==================================================>]  6.144kB/6.144kB
295 3fe67ade2cc6: Loading layer [==================================================>]  3.072kB/3.072kB
296 eeb315c508b1: Loading layer [==================================================>]  77.82kB/77.82kB
297 0439f8e04051: Loading layer [==================================================>]  8.704kB/8.704kB
298 ec476b61f06f: Loading layer [==================================================>]  13.82kB/13.82kB
299 9f752899cdce: Loading layer [==================================================>]  5.632kB/5.632kB
300 027f1ff8b124: Loading layer [==================================================>]  3.584kB/3.584kB
301 f9b50836c42f: Loading layer [==================================================>]   5.12kB/5.12kB
302 2f68f3a1869a: Loading layer [==================================================>]   89.6kB/89.6kB
303 61f05bc1691a: Loading layer [==================================================>]  495.2MB/495.2MB
304 24d441f4dab8: Loading layer [==================================================>]  191.5kB/191.5kB
305 Loaded image ID: sha256:7d0b68af5a06e04c2713dab89a293dc1b1dff5ccbaab8235e97cbc9cff7db2cb
306 [root@docker vagrant]# docker images
307 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
308                             7d0b68af5a06        5 days ago          694MB
309 
310 ###Add a tag for repository.###
311 [root@docker vagrant]# docker tag 7d0b68af5a06 CentOS7
312 Error parsing reference: "CentOS7" is not a valid repository/tag: invalid reference format: repository name must be lowercase
313 [root@docker vagrant]# docker tag 7d0b68af5a06 centos7 - Change the repository name into lowercase.
314 [root@docker vagrant]# docker images
315 REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
316 centos7             latest              7d0b68af5a06        6 days ago          694MB
317 [root@docker vagrant]#
318 
319 ###Check whether there're running containers.###
320 [root@docker vagrant]# docker ps -a
321 CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
322 [root@docker vagrant]#
323 
324 ###Start a container with dependency of directory themselves.###
325 [root@docker vagrant]# mkdir mysql_soft
326 [root@docker vagrant]# mkdir data1
327 [root@docker vagrant]# docker run -d -v /vagrant/mysql_soft:/opt/mysql -v /vagrant/data1:/data -v /etc/hosts:/etc/hosts -p2222:22  --cap-add=NET_ADMIN  --name node1 -h docker centos7
328 9ff260da9643d7b8243668699760d7a64d3f797a1cd2a9bc2562f11e9790dcc7
329 [root@docker vagrant]# df -h
330 Filesystem               Size  Used Avail Use% Mounted on
331 /dev/mapper/centos-root  8.4G  2.1G  6.3G  26% /
332 devtmpfs                 488M     0  488M   0% /dev
333 tmpfs                    497M     0  497M   0% /dev/shm
334 tmpfs                    497M  6.7M  491M   2% /run
335 tmpfs                    497M     0  497M   0% /sys/fs/cgroup
336 /dev/sda1                497M  118M  379M  24% /boot
337 none                     612G  243G  369G  40% /vagrant
338 tmpfs                    100M     0  100M   0% /run/user/0
339 /dev/dm-3                 10G  682M  9.4G   7% /var/lib/docker/devicemapper/mnt/fe5e6b5cf3f15ebcd2a1d0805919d1858b789b37a2f5d1c31af771072e812334
340 shm                       64M     0   64M   0% /var/lib/docker/containers/9ff260da9643d7b8243668699760d7a64d3f797a1cd2a9bc2562f11e9790dcc7/mounts/shm
341 [root@docker vagrant]# docker ps -a
342 CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                    PORTS                  NAMES
343 9ff260da9643        centos7             "/usr/bin/supervisor…"   14 seconds ago      Up 13 seconds (healthy)   0.0.0.0:2222->22/tcp   node1
344 
345 ###Check the IP of docker "node1".###
346 [root@docker vagrant]# docker inspect node1 | grep IPAddress
347             "SecondaryIPAddresses": null,
348             "IPAddress": "172.17.0.2",
349                     "IPAddress": "172.17.0.2",
350 
351 ###Login docker "node1".###
352 [root@docker vagrant]# ssh root@172.17.0.2
353 The authenticity of host '172.17.0.2 (172.17.0.2)' can't be established.
354 ECDSA key fingerprint is 1c:3a:48:00:26:63:1f:5b:6d:82:bf:0a:4d:df:03:cc.
355 Are you sure you want to continue connecting (yes/no)? yes
356 Warning: Permanently added '172.17.0.2' (ECDSA) to the list of known hosts.
357 root@172.17.0.2's password: 
358 Last login: Wed Jun 13 00:18:11 2018 from 172.17.0.1
359 [root@docker ~]# df -h
360 Filesystem                                                                                          Size  Used Avail Use% Mounted on
361 /dev/mapper/docker-253:0-16777839-fe5e6b5cf3f15ebcd2a1d0805919d1858b789b37a2f5d1c31af771072e812334   10G  682M  9.4G   7% /
362 tmpfs                                                                                                64M     0   64M   0% /dev
363 tmpfs                                                                                               497M     0  497M   0% /sys/fs/cgroup
364 none                                                                                                612G  243G  369G  40% /data
365 /dev/mapper/centos-root                                                                             8.4G  2.1G  6.3G  26% /etc/hosts
366 shm                                                                                                  64M     0   64M   0% /dev/shm
367 tmpfs                                                                                               497M     0  497M   0% /proc/scsi
368 tmpfs                                                                                               497M     0  497M   0% /sys/firmware

 

Summary

  • The docker has been installed properly.Now all the newly added container can share the contents and diskspace in directory "/vagrant" on host "docker".
  • You don't need to to copy MySQL db software to each of your node anymore now.
  • As soon as you copy a file to "/vagrant",it will appear in the container's dierctory "/opt/mysql" and the free diskspace depends on your diskspace of physical machine.Does it convenient?I'm afraid it really does.
 

转载于:https://www.cnblogs.com/aaron8219/p/9193906.html

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