Welcome to the Linux Foundation Forum!
Question about docker overlay volume
kaisong
Posts: 13
My understanding of overlay volume is that it's created on-the-fly with CoW. So, if I create a new file in a running container, I expect to see a new volume being created. However, this doesn't seem to be the case:
kaisong@ubuntu-vm:~$ docker volume prune WARNING! This will remove all local volumes not used by at least one container. Are you sure you want to continue? [y/N] y Deleted Volumes: 32bbf8d5fa65cfdebcb5d5ec6e34007e95bd64825f8119f754c9f22a8c7dc31e e0e240c78fd0502bf3152b8787646791d90e7e37a93ebda6294aac12dc1d0839 112f591c70f24aac666e23b61ce37776faa3758497c596a4d43a1fdc0092ca2c e374aa536721558f33b4ad730ff3dad57d9988d653488cbfadde1ebb409e1e72 0fdfe34b79dea33d4d25bb6b23cad048ad455fa6d2d31ebabc8c70454223cb6c Total reclaimed space: 3.372GB kaisong@ubuntu-vm:~$ docker volume ls DRIVER VOLUME NAME local cmountvol kaisong@ubuntu-vm:~$ docker container ls |grep web1 a5882c59e10e nginx "/docker-entrypoint.…" 17 hours ago Up 17 hours 0.0.0.0:80->80/tcp, :::80->80/tcp web1 kaisong@ubuntu-vm:~$ docker container exec -ti web1 sh # mkdir /data # touch /data/foobar # ls /data foobar # read escape sequence kaisong@ubuntu-vm:~$ docker volume ls #Expect a new volume to be created to overlay the "web1" container DRIVER VOLUME NAME local cmountvol kaisong@ubuntu-vm:~$
Can anyone help me to understand where the /data/foobar is being saved on the host for the container "web1"?
0
Categories
- All Categories
- 60 LFX Mentorship
- 113 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 321 Cloud Engineer IT Professional Program
- 142 Advanced Cloud Engineer IT Professional Program
- 55 DevOps Engineer IT Professional Program
- 68 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.3K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 175 LFD103 Class Forum
- 22 LFD121 Class Forum
- 2 LFD137 Class Forum
- 61 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 653 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 2 LFS145 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 12 LFS203 Class Forum
- 92 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 12 LFS244 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 142 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 106 LFS260 Class Forum
- 145 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 20 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 249 LFW211 Class Forum
- 177 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 907 Hardware
- 220 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 764 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 143 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 482 Linux System Administration
- 40 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 51 Web Management
- 72 Mobile Computing
- 25 Android
- 32 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 545 Off Topic
- 132 Introductions
- 223 Small Talk
- 22 Study Material
- 831 Programming and Development
- 282 Kernel Development
- 515 Software Development
- 974 Software
- 260 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)