# When to upgrade docker (and how)?

**URL:** <https://meta.discourse.org/t/when-to-upgrade-docker-and-how/86989>\
**Category:** Support\
**Created:** [5월 8, 2018, 11:40오전 UTC](https://meta.discourse.org/t/when-to-upgrade-docker-and-how/86989 "2018-05-08T11:40:02Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![peternlewis](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/peternlewis/32/108888_2.png) [@peternlewis](https://meta.discourse.org/u/peternlewis)\
**Post date:** [8월 1, 2018, 4:42오전 UTC](https://meta.discourse.org/t/when-to-upgrade-docker-and-how/86989/17 "2018-08-01T04:42:32Z")

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What is not covered here is the “how” part.

Currently, according to app-cache, I have docker-engine installed:

> docker-engine/ubuntu-trusty,now 17.05.0~ce-0~ubuntu-trusty amd64 [installed]

and I get the warning

> WARNING: Docker version 17.05.0-ce deprecated, recommend upgrade to 17.06.2 or newer.

However the [Get Docker CE for Ubuntu](https://docs.docker.com/install/linux/docker-ce/ubuntu/) instructions start with “Uninstall old versions `docker` or `docker-engine`” before installing docker-ce.

Needless to say, anything that starts with “uninstall stuff” makes me more than a little nervous as to how much of my site it plans on deleting, and how safe it is to go ahead and uninstall docker-engine, and then install docker-ce, and expect my site to be there and working when I finish. How safe is this process? If I have a site working with docker-engine, and I follow the `Get Docker CE for Ubuntu` instructions, uninstall docker-engine, install docker-ce via the “Install using the repository” instructions, am I likely to actually have a working site at the end of it?

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