{"action":"created","issue":{"url":"https://api.github.com/repos/docker/docker/issues/15655","labels_url":"https://api.github.com/repos/docker/docker/issues/15655/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/15655/comments","events_url":"https://api.github.com/repos/docker/docker/issues/15655/events","html_url":"https://github.com/docker/docker/issues/15655","id":101618022,"number":15655,"title":"Support copy-on-write VOLUME mount mode","user":{"login":"maxmanuylov","id":1440368,"avatar_url":"https://avatars.githubusercontent.com/u/1440368?v=3","gravatar_id":"","url":"https://api.github.com/users/maxmanuylov","html_url":"https://github.com/maxmanuylov","followers_url":"https://api.github.com/users/maxmanuylov/followers","following_url":"https://api.github.com/users/maxmanuylov/following{/other_user}","gists_url":"https://api.github.com/users/maxmanuylov/gists{/gist_id}","starred_url":"https://api.github.com/users/maxmanuylov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/maxmanuylov/subscriptions","organizations_url":"https://api.github.com/users/maxmanuylov/orgs","repos_url":"https://api.github.com/users/maxmanuylov/repos","events_url":"https://api.github.com/users/maxmanuylov/events{/privacy}","received_events_url":"https://api.github.com/users/maxmanuylov/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-08-18T09:56:09Z","updated_at":"2015-08-18T09:56:10Z","closed_at":null,"body":"I have some folder on host that I want to mount to container. I do not want the container to modify that folder on host, but I nevertheless want it to be writable from inside the container. So I want to mount that folder as copy-on-write VOLUME to read the files from host, but make changes inside the container and do not keep them after container is deleted.\r\n\r\nPossible workaround is to use COPY Dockerfile instruction to build a new image with that folder inside but it is not an option when the folder is rather big. Another workaround is described here: https://stackoverflow.com/questions/29550736/can-i-mount-docker-host-directory-as-copy-on-write-overlay/30101039#30101039\r\n\r\nBut I want it to be simple like this:\r\n\r\n```docker run -v /path/on/host:/path/in/container:cow myimage```"},"comment":{"url":"https://api.github.com/repos/docker/docker/issues/comments/132150638","html_url":"https://github.com/docker/docker/issues/15655#issuecomment-132150638","issue_url":"https://api.github.com/repos/docker/docker/issues/15655","id":132150638,"user":{"login":"GordonTheTurtle","id":10620046,"avatar_url":"https://avatars.githubusercontent.com/u/10620046?v=3","gravatar_id":"","url":"https://api.github.com/users/GordonTheTurtle","html_url":"https://github.com/GordonTheTurtle","followers_url":"https://api.github.com/users/GordonTheTurtle/followers","following_url":"https://api.github.com/users/GordonTheTurtle/following{/other_user}","gists_url":"https://api.github.com/users/GordonTheTurtle/gists{/gist_id}","starred_url":"https://api.github.com/users/GordonTheTurtle/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GordonTheTurtle/subscriptions","organizations_url":"https://api.github.com/users/GordonTheTurtle/orgs","repos_url":"https://api.github.com/users/GordonTheTurtle/repos","events_url":"https://api.github.com/users/GordonTheTurtle/events{/privacy}","received_events_url":"https://api.github.com/users/GordonTheTurtle/received_events","type":"User","site_admin":false},"created_at":"2015-08-18T09:56:10Z","updated_at":"2015-08-18T09:56:10Z","body":"Hi!\n\t\nPlease read this important information about creating issues.\n\nIf you are reporting a new issue, make sure that we do not have any duplicates already open. You can ensure this by searching the issue list for this repository. If there is a duplicate, please close your issue and add a comment to the existing issue instead.\n\nIf you suspect your issue is a bug, please edit your issue description to include the BUG REPORT INFORMATION shown below. If you fail to provide this information within 7 days, we cannot debug your issue and will close it. We will, however, reopen it if you later provide the information.\n\nThis is an automated, informational response. \n\nThank you.\n\nFor more information about reporting issues, see https://github.com/docker/docker/blob/master/CONTRIBUTING.md#reporting-other-issues \n\n-----------------------------\nBUG REPORT INFORMATION\n-----------------------------\nUse the commands below to provide key information from your environment:\n\n`docker version`:\n`docker info`:\n`uname -a`:\n\nProvide additional environment details (AWS, VirtualBox, physical, etc.):\n\n\n\nList the steps to reproduce the issue:\n1.\n2.\n3.\n\n\nDescribe the results you received:\n\n\nDescribe the results you expected:\n\n\nProvide additional info you think is important:\n\n\n----------END REPORT ---------\n\n\n\n#ENEEDMOREINFO\n"}}