Thanks for the detailed info. I have no real desire to get into Docker
at this point (likely will at a later date). I was just enticed by the
statement on the James home page: (http://james.apache.org/index.html)
that says I can download and install James in one statement:
*=====
*
*STEPS YOU HAVE TO FOLLOW:*
Pull and run the James image with the following single command:
|docker run -p "25:25" -p "143:143" linagora/james-jpa-sample:3.3.0|
Then, connect this image with for instance, Thunderbird.
====
I just did what it said. I'll try dropping off the 3.3.0. But I feel
like we're just shooting in the dark trying to guess at the package name
docker is looking for. Is there a way to list the package names that
docker is aware of?
Thx
Jerry
On 8/29/2019 2:53 AM, Aleksandar Stoisavljevic wrote:
Hi Jerry,
I'll try to be brief and not to come into many details of how Docker is
working.
For that, I suggest that you go through some video materials and/or to find
some
really extensive documentation on Internet (blogs, posts, Docker
documentation, books, etc.)
In the meantime, I'll try to explain what happened in your case.
Obviously you've installed Docker correctly as we can see from command
response.
There are actually two concepts in Docker that you have to distinguish:
Docker Image and
Docker Container.
Docker Container is "running version" of Docker Image.
When you stated:
[ec2-user@ip-172-31-47-236 ~]$ docker run -p "25:25" -p "143:143"
linagora/james-jpa-sample:3.3.0
It actually means that it will try to run Docker Container, listening on
host ports 25 and 143, and Container should
be of a Docker Image "linagora/james-jpa-sample:3.3.0".
That image, "linagora/james-jpa-sample:3.3.0", should be availabe either
locally or placed somewhere on Internet, so
Docker can access it and grab it. For this kind of Docker Image store,
usually people use Docker Hub (https://hub.docker.com/),
but there are also other Docker Repositories (private or public).
As you don't have it locally, that Docker Image
("linagora/james-jpa-sample:3.3.0"), therefore you've got that information
in reponse:
"Unable to find image 'linagora/james-jpa-sample:3.3.0' locally".
At that moment, Docker Engine will try to grab that image from Docker Hub.
But unfortunately, I don't see that 3.3.0 version of that image exists.
You can go to URL (https://hub.docker.com/r/linagora/james-jpa-sample/tags)
for yourself and make sure that it doesn't exists.
I don't know how did you get that 3.3.0, maybe it is in some outdated
documentation, but I suggest that you try either with latest tag
(so the command would be docker run -p "25:25" -p "143:143"
linagora/james-jpa-sample) or if you really have some reasons for 3.3.X
then I would try with docker run -p "25:25" -p "143:143"
linagora/james-jpa-sample:3.3.X
Let's try that and then just reply to this thread.
Than You
On Thu, Aug 29, 2019 at 5:18 AM Jerry Malcolm <techst...@malcolms.com>
wrote:
I was preparing to do a trial run at getting James up and running on an
AWS EC2 instance. I went to the James home page and saw there is a
1-line command to download and install it. However, to use that one
line there is apparently an assumption of a full understanding of Docker
and a pre-existing installation of Docker. Docker isn't automatically
installed with Amazon Linux in an EC2. I was able to install it with
yum. But when I entered the command from the JAMES getting started
page, this is what I got:
[ec2-user@ip-172-31-47-236 ~]$ docker run -p "25:25" -p "143:143"
linagora/james-jpa-sample:3.3.0
Unable to find image 'linagora/james-jpa-sample:3.3.0' locally
docker: Error response from daemon: manifest for
linagora/james-jpa-sample:3.3.0 not found.
See 'docker run --help'.
Since there's no url to download james, I assume that the manifest that
it is saying that it can't find contains all of that useful info. I
know nothing about how Docker works. Where would I find the missing
manifest, and if it was expected to automatically come with Docker as
implied with the "1-line-download-install" statement, what did I do wrong?
Thx
Jerry
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