Forget Kubernetes for now :) My recipe is using a multi-stage build. Very crudely:
FROM maven as maven # build your webapp into a .war mvn clean install FROM tomcat COPY --from=maven /webapp/target/ROOT webapps/ROOT/ It copies the whole folder from the build directory rather than the .war file. Here is an example: https://github.com/AtomGraph/LinkedDataHub/blob/master/Dockerfile It does not use tomcat image directly but rather an intermediary image which adds config as ENV capabilities as well as LetsEncrypt certificates: https://hub.docker.com/r/atomgraph/letsencrypt-tomcat/ You might also want to take a look at the entrypoint script which is a bit more involved: https://github.com/AtomGraph/LinkedDataHub/blob/master/platform/entrypoint.sh Look at the container as a large function. Minimize the number of inputs to it - generate all the configs that can be generated and execute the init actions within Dockerfile and/or entrypoint. Mount the rest from host as volumes, under Tomcat's webapps/ROOT (assuming you're Dockerizing one webapp). Martynas atomgraph.com On Thu, Jan 9, 2020 at 8:32 PM Christopher Schultz <ch...@christopherschultz.net> wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Pater, > > On 1/9/20 12:39 PM, logo wrote: > >> Am 09.01.2020 um 17:51 schrieb Alex K <rightkickt...@gmail.com>: > >> > >> Hi all, > >> > >> I have two .war files that when deployed at a plain Debian 9 VM > >> are working fine. I have prepared a docker file so as to deploy > >> the same apps within a docker container and for some reason one > >> of the apps is not loading due to some error. > >> > >> Dockerfile: FROM debian:latest > > > > Why not using any of the different flavored tomcat images? > > > > https://hub.docker.com/_/tomcat <https://hub.docker.com/_/tomcat> > > > > You get a working jdk (oracle, adopt, openjdk) and don’t have to > > build the system yourself. That may help to get the base running > > and then copy your file to the correct spots. > > If you've got experience with Docker, I'd love for someone to put > together a post/presenation/whatever which addresses this question: > > I've got an application that I deploy to Tomcat on a traditional > server; How do I Dockerize that? > > Specifically, I'd like more than just "well, docker-compose with your > WAR file and put it in the right place" because we all know that there > are plenty of configuration files, etc. that don't work well with a > WAR file, etc. > > So maybe this bleeds into "well, if you want to use Docker, maybe you > want to consider Kubernetes for configuration" and then explain how > you might move some of your server/application configuration into > Kubernetes (or similar). I'd like to understand how to package-up > things like this to be able to eventually use something like AWS's > auto-scaling. > > - -chris > -----BEGIN PGP SIGNATURE----- > Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ > > iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl4Xf6sACgkQHPApP6U8 > pFgobg//Zf5fQ5RqqNDYRDk8KFuS7QWmsZWxUez/waeEbrLW0z/iBRYaIDf63dDs > G6/XOPAKov5K4jWxLxTeUY/GUVklwdqy8mGnQJwEmBOlFrMqidfrYZEbx4b6Us1o > /GiAch2QUFhflaZ7DzSjxLYosMdReiQRl4PXnLVxNUQ7jB7aRaYRMwXgjCJGc66b > PXJSUamYhngIlV4ZYB23ACJsbUlaacsyiYdXOJNSuip/xb8atz547KuGT7shCT0P > QqJMNDD91KHWBtgrldkO9pb6zYMpwCUxf5PE9jpgk6U6MDlXeXF+HGEnYY6PFxwV > kJfsPt2JUIC8Coo7ydkboxUgSQ16xvV6/PvhAdUGiaadS+WF4ZullveqSyNVHBQw > dQI563oQYZ1qfh8zcHeZdsb7TLIaVh9Vx2Vn/+XN1bA1tcvjJx+Pz0fEHjtTy8Q+ > JW2nLIV2ZdbpsdHi0FjdIWIXscg+EyVMUiPx+qmpVyFA3Al7GWLc1h7yQic+hsuT > oscRQf2crbu2tpPBBRP5YodtcAtOOvxbbRsQnALxKuBhBDmFzdl4taPTXlko6Kqc > b1C/onqwrDlVPKwySPWFU43rTCLImD0L7eGCDxIzDX5z/HbGahtvYxKXf/Jpg7Sl > lZuGlyhIIgRoWZF3utUsI11YjRsmRFme0EtfpMdBz/Xb4v/9YeU= > =PK8y > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
