Re: [Userops] Why is it hard to move from one machine to another? An analysis.

[韋嘉誠]

On Apr 9, 2015 6:18 PM, "Dave Crossland" <address@hidden> wrote:
> On 9 April 2015 at 11:58, Bob Mottram <address@hidden> wrote:

>> Maybe Docker and containers are the way to go, but  I have some concerns.
>> Installing initially from a Dockerfile, or equivalent, might be ok but there
>> is then the problem of keeping the container up to date with security
>> patches, application upgrades and wotnot.
>
> I think this is bare-metal mindset. You don't update the container; you 
> create a new one, and you throw throw the old one away after its no longer in 
> use.

That's great when the container is free of state, but it can't be
turtles all the way down. The state needs to be somewhere and if it's
in a container, that container can't be just rebuilt unless the
container itself is stateless and the state is mounted in like the
Sandstorm /var.