Re: [Hawkular-dev] Docker image size does matter

From experience in the field, i've not had any customers complain / comment

----- Original Message ----- > From: "Heiko W.Rupp" <hrupp(a)redhat.com&gt; > To: "Discussions around Hawkular development" < hawkular-dev(a)lists.jboss.org&gt; > Sent: Wednesday, 1 February, 2017 7:19:34 AM > Subject: Re: [Hawkular-dev] Docker image size does matter > > On 1 Feb 2017, at 12:29, Jiri Kremser wrote: > > > base image with JRE 8 and Alpine linux: 76.8 MB > > Yes, alpine is only 3-4 MB that is great. Please also take into consideration that minimal docker images do not contain common commands and can be a pain if you need to go into the container and run commands. Trying to debug issues when you don't have access to basic commands can be a bit frustrating. Especially if you are not root and cannot just install binaries in the container. > > I also removed > > 9.2M /opt/jboss/wildfly/docs > > Makes sense. > > > > What also helped was squashing all the image layers into 1. This makes > > the > > download faster and possibly the image smaller. When applying > > docker-squash > > [1] to the current h-services image it saves ~50megs > > This is a bit of a false friend as docker pull only transfers layers it > does not yet have. > > E.g > > $ docker pull pilhuhn/hawkular-services:0.30.0.Final > 0.30.0.Final: Pulling from pilhuhn/hawkular-services > 08d48e6f1cff: Already exists > 664e6a3041e6: Already exists > 2f8461e7022b: Already exists > 9500f4548bd3: Already exists > 69e2e5217a47: Already exists > cf95509fd4ad: Downloading [======> > ] 10.75 MB/89.61 MB > > So what you say is true for the first download, but afterwards all > the base layers of wf + jdk + ... are present. With stripping > into 1 layer there is no chance of caching. > Situation of course changes when the base layer is updated > > > > I am aware that this probably wont fly with some RH policy that we > > should > > base our SW on Fedora/RHEL base OS images, but I am gonna use them for > > development and because I often run out of space because of Docker. > > I like those alpine images and use them for private stuff, > but for Hawkular upstream I think we should use something > that is close for downstream so minimise the moving parts. > _______________________________________________ > hawkular-dev mailing list > hawkular-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/hawkular-dev > _______________________________________________ hawkular-dev mailing list hawkular-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hawkular-dev