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
- 51 LFX Mentorship
- 104 LFX Mentorship: Linux Kernel
- 576 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 61 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2.1K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 158 LFD103 Class Forum
- 20 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 611 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 25 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 75 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 37 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 141 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 18 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 236 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 903 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 538 Off Topic
- 131 Introductions
- 217 Small Talk
- 22 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 61 All In Program
- 61 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)