docker 应用数据的管理
容器数据存储的三种方式
docker volume docker管理素质及文件系统的一部分，保存数据最佳方式
bind mounts 将宿主机的文件映射到容器里
tmpfs 存储在宿主机的内存里
查看docker 的默认存储驱动
Containers: 9
Running: 5
Paused: 0
Stopped: 4
Images: 3
Server Version: 18.09.2
Storage Driver: overlay2 默认存储驱动
Backing Filesystem: xfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9754871865f7fe2f4e74d43e2fc7ccd237edcbce
runc version: 09c8266bf2fcf9519a651b04ae54c967b9ab86ec
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-862.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.622GiB
Name: localhost.localdomain
ID: BEO4:3VTY:XQ4A:UCJE:QLQL:OGXD:VOBQ:WMUY:V5PL:LTL5:3KPH:7YIX
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Registry Mirrors:
http://f1361db2.m.daocloud.io/
Live Restore Enabled: false
Product License: Community Engine
容器数据卷的管理
查看当前系统数据卷
[root@localhost ~]# docker volume ls
DRIVER VOLUME NAME
创建数据卷
[root@localhost ~]# docker volume ls
DRIVER VOLUME NAME
local chenxi_vol
查看数据卷的详细信息
[root@localhost ~]# docker volume inspect chenxi_vol
[
{
"CreatedAt": "2019-02-22T14:19:31+08:00",
"Driver": "local",
"Labels": {},
"Mountpoint": "/var/lib/docker/volumes/chenxi_vol/_data", 实际宿主机的目录
"Name": "chenxi_vol",
"Options": {},
"Scope": "local"
}
]
删除已存在的所有容器
[root@localhost ~]# docker rm -f $(docker ps -a | awk '{print $1}' )
7638633dc06a
0771848dd42e
25aff37e7dd0
ab4b909c4e68
a3bdc2062cd7
d2394de6c3a1
53dfa07e6f2c
4279c14287c1
dc2a611dae83
Error: No such container: CONTAINER
启动容器并挂载数据卷
[root@localhost ~]# docker run -d --name web-1 -p 80:80 --mount
src=chenxi_vol,dst=/usr/share/nginx/html nginxc074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22
[root@localhost ~]# docker inspect web-1
[
{
"Id": "c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22",
"Created": "2019-02-22T06:35:20.789320917Z",
"Path": "nginx",
"Args": [
"-g",
"daemon off;"
],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 22721,
"ExitCode": 0,
"Error": "",
"StartedAt": "2019-02-22T06:35:22.374476291Z",
"FinishedAt": "0001-01-01T00:00:00Z"
},
"Image": "sha256:f09fe80eb0e75e97b04b9dfb065ac3fda37a8fac0161f42fca1e6fe4d0977c80",
"ResolvConfPath": "/var/lib/docker/containers/c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22/hostname",
"HostsPath": "/var/lib/docker/containers/c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22/hosts",
"LogPath": "/var/lib/docker/containers/c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22/c074c3141663aa7b52b45af4d15fc8a4a13d94b334b70c99fd2f7a5d6c065d22-json.log",
"Name": "/web-1",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "",
"ExecIDs": null,
"HostConfig": {
"Binds": null,
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "default",
"PortBindings": {},
"RestartPolicy": {
"Name": "no",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": null,
"CapDrop": null,
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": null,
"GroupAdd": null,
"IpcMode": "shareable",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DiskQuota": 0,
"KernelMemory": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": 0,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"Mounts": [
{
"Type": "volume",
"Source": "chenxi_vol", 挂载数据卷
"Target": "/usr/share/nginx/html"
}
],
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/a0e351c43971e9ccab264bf25a49506959a354b635b2351a9afaedd50d78c135-init/diff:/var/lib/docker/overlay2/1491a86a89f7d4721b73639455d75fb153bc1
2c6cdaee687039d2e9317215741/diff:/var/lib/docker/overlay2/808c5a465c27497cb57ea709b083e855b6e11e2efa70887b1e3d6f2ece944ab3/diff:/var/lib/docker/overlay2/97f2bebcc1413f092415377b6d7e31dec473bd074f23afcde2d2394c65feed65/diff", "MergedDir": "/var/lib/docker/overlay2/a0e351c43971e9ccab264bf25a49506959a354b635b2351a9afaedd50d78c135/merged",
"UpperDir": "/var/lib/docker/overlay2/a0e351c43971e9ccab264bf25a49506959a354b635b2351a9afaedd50d78c135/diff",
"WorkDir": "/var/lib/docker/overlay2/a0e351c43971e9ccab264bf25a49506959a354b635b2351a9afaedd50d78c135/work"
},
"Name": "overlay2"
},
"Mounts": [
{
"Type": "volume",
"Name": "chenxi_vol",
"Source": "/var/lib/docker/volumes/chenxi_vol/_data",
"Destination": "/usr/share/nginx/html",
"Driver": "local",
"Mode": "z",
"RW": true,
"Propagation": ""
}
],
"Config": {
"Hostname": "c074c3141663",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"80/tcp": {}
},
"Tty": false,
"OpenStdin": false,
"StdinOnce": false,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"NGINX_VERSION=1.15.8-1~stretch",
"NJS_VERSION=1.15.8.0.2.7-1~stretch"
],
"Cmd": [
"nginx",
"-g",
"daemon off;"
],
"ArgsEscaped": true,
"Image": "nginx",
"Volumes": null,
"WorkingDir": "",
"Entrypoint": null,
"OnBuild": null,
"Labels": {
"maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
},
"StopSignal": "SIGTERM"
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "0439f377a7e2778a55457b8d48615adf0bba1fbe425bb72e03f4d5b95d31f0c5",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"80/tcp": null
},
"SandboxKey": "/var/run/docker/netns/0439f377a7e2",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "79bffed969d27453e7cc9e0bd1e42f59e2279374423673731221973ade7c5e6d",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "3b2c8016eb022a0e3a9896ff22b7aee66d3034fef8b301b91dc791ff184eef13",
"EndpointID": "79bffed969d27453e7cc9e0bd1e42f59e2279374423673731221973ade7c5e6d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
[root@localhost ~]# ls /var/lib/docker/volumes/chenxi_vol/_data
50x.html index.html
前端访问
修改网页内容
[root@localhost ~]# echo "haha" > /var/lib/docker/volumes/chenxi_vol/_data/index.html
删除容器
[root@localhost ~]# docker rm -f web-2
web-2
重新再起一个挂载相同数据卷
[root@localhost ~]# docker run -d --name web-3 -p 80:80 --mount src=chenxi_vol,dst=/usr/share/nginx/html nginx
0a82046ce01576d2832c236c6d7cfe548ab09954a8757b2b8f32615712fdd078
[root@localhost ~]# ss -lntp
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
users:(("sshd",pid=921,fd=3))LISTEN 0 100 127.0.0.1:25 *:*
users:(("master",pid=1310,fd=13))LISTEN 0 128 :::80 :::*
users:(("docker-proxy",pid=23126,fd=4))LISTEN 0 128 :::22 :::*
users:(("sshd",pid=921,fd=4))LISTEN 0 100 ::1:25 :::*
创建容器使用另一种方式挂载数据目录
[root@localhost ~]# docker run -d --name web-4 -p 84:80 -v chenxi_vol:/usr/share/nginx/html nginx
d3c1a6e2d46ed8867f08a1eb9a7f4438bdfa1960af148e066be409e8c6072c44
[root@localhost ~]# ss -lntp
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
users:(("sshd",pid=921,fd=3))LISTEN 0 100 127.0.0.1:25 *:*
users:(("master",pid=1310,fd=13))LISTEN 0 128 :::80 :::*
users:(("docker-proxy",pid=23126,fd=4))LISTEN 0 128 :::84 :::*
users:(("docker-proxy",pid=23221,fd=4))LISTEN 0 128 :::22 :::*
users:(("sshd",pid=921,fd=4))LISTEN 0 100 ::1:25 :::*
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