Here's the Dockerfile as a txt and pasted. Any help would be greatly appreciated.

FROM tomcat:10.1-jdk21-temurin

ARG RAILWAY_PUBLIC_DOMAIN
ARG RAILWAY_PRIVATE_DOMAIN
ARG RAILWAY_PROJECT_NAME
ARG RAILWAY_ENVIRONMENT_NAME
ARG RAILWAY_SERVICE_NAME
ARG RAILWAY_PROJECT_ID
ARG RAILWAY_ENVIRONMENT_ID
ARG RAILWAY_SERVICE_ID

ENV RAILWAY_PUBLIC_DOMAIN=$RAILWAY_PUBLIC_DOMAIN \
    RAILWAY_PRIVATE_DOMAIN=$RAILWAY_PRIVATE_DOMAIN \
    RAILWAY_PROJECT_NAME=$RAILWAY_PROJECT_NAME \
    RAILWAY_ENVIRONMENT_NAME=$RAILWAY_ENVIRONMENT_NAME \
    RAILWAY_SERVICE_NAME=$RAILWAY_SERVICE_NAME \
    RAILWAY_PROJECT_ID=$RAILWAY_PROJECT_ID \
    RAILWAY_ENVIRONMENT_ID=$RAILWAY_ENVIRONMENT_ID \
    RAILWAY_SERVICE_ID=$RAILWAY_SERVICE_ID

WORKDIR /usr/local/tomcat/webapps

RUN rm -rf ./*

RUN apt-get update && \
    apt-get install -y maven

COPY target/CCODE.pattern.rest.war ROOT.war
RUN ls -la
WORKDIR /app


RUN --mount=type=cache,id=s/cbcd6488-98bc-4b7a-98d0-a1209477cc8e-/root/.m2,target=/root/.m2 \
    mvn -DskipTests clean install

RUN apt-get clean && \
    rm -rf /var/lib/apt/lists/*

CMD ["catalina.sh", "run"] 

I've also been trying to get some visibility with ls and tree commands, if anyone knows if there's a way to reveal the file structure that would also be very helpful.

Have you got this working without a cache mount yet?

Hi Brody, without changing the "RUN --mount=type=cache…" instruction, I've tried adding variations of "-docker build --no-cache ." to Railway's Custom Build Command without success.

You have no acess to the docker cli, please share why you think you would?

I'm not sure what the structure or limitations around Docker are, I am a beginner user.

Have you got this working without a cache mount yet?

Can you tell me how to do that? I've tried removing the --mount command and the Custom Build Command mentioned earlier to no avail.

Have you not tried removing the cache mount from the dockerfile?

Yes

Send your current dockerfile please.

``` FROM tomcat:10.1-jdk21-temurin

ARG RAILWAYPUBLICDOMAIN
ARG RAILWAYPRIVATEDOMAIN
ARG RAILWAYPROJECTNAME
ARG RAILWAYENVIRONMENTNAME
ARG RAILWAYSERVICENAME
ARG RAILWAYPROJECTID
ARG RAILWAYENVIRONMENTID
ARG RAILWAYSERVICEID

ENV RAILWAYPUBLICDOMAIN=$RAILWAYPUBLICDOMAIN \
RAILWAYPRIVATEDOMAIN=$RAILWAYPRIVATEDOMAIN \
RAILWAYPROJECTNAME=$RAILWAYPROJECTNAME \
RAILWAYENVIRONMENTNAME=$RAILWAYENVIRONMENTNAME \
RAILWAYSERVICENAME=$RAILWAYSERVICENAME \
RAILWAYPROJECTID=$RAILWAYPROJECTID \
RAILWAYENVIRONMENTID=$RAILWAYENVIRONMENTID \
RAILWAYSERVICEID=$RAILWAYSERVICEID

WORKDIR /usr/local/tomcat/webapps

RUN rm -rf ./*

RUN apt-get update && \
apt-get install -y maven

COPY target/CCODE.pattern.rest.war ROOT.war

WORKDIR /app

RUN mvn -DskipTests clean install

RUN apt-get clean && \
rm -rf /var/lib/apt/lists/*

CMD ["catalina.sh", "run"]
```

I know I'm doing something wrong, been reading forums and documentation and scratching my head all day about it.

Whats with all the ARG RAILWAY_ lines?

Just clutter at the moment, I think I was hoping to get some visibility.

And what's the current error you get?

```

8 [5/8] COPY target/CCODE.pattern.rest.war ROOT.war

8 ERROR: failed to calculate checksum of ref 0eb318fa-722a-4cac-8d08-f9b3871d930d::m7za1wtpzsjiacst6sjn6nwmh: failed to walk /var/lib/docker/tmp/buildkit-mount1968124015/target: lstat /var/lib/docker/tmp/buildkit-mount1968124015/target: no such file or directory

9 [1/8] FROM docker.io/library/tomcat:10.1-jdk21-temurin@sha256:ae222bd36d0719037741b36750376da8d4b07c1f47108ddb340966ae47b5995b

9 resolve docker.io/library/tomcat:10.1-jdk21-temurin@sha256:ae222bd36d0719037741b36750376da8d4b07c1f47108ddb340966ae47b5995b done

9 sha256:ae222bd36d0719037741b36750376da8d4b07c1f47108ddb340966ae47b5995b 979B / 979B done

9 sha256:fca42eb4b55005efff2b87d5efca5bb311427ffa161099baa4ae748315b87d35 13.13kB / 13.13kB done

9 sha256:9f7f76109c8e077f7c52649629e04366539c48703d6589c31685de2bacb51065 2.00kB / 2.00kB done

9 CANCELED

[5/8] COPY target/CCODE.pattern.rest.war ROOT.war:

Dockerfile:28

26 | apt-get install -y maven

27 |

28 | >>> COPY target/CCODE.pattern.rest.war ROOT.war

29 |

30 | WORKDIR /app

ERROR: failed to solve: failed to compute cache key: failed to calculate checksum of ref 0eb318fa-722a-4cac-8d08-f9b3871d930d::m7za1wtpzsjiacst6sjn6nwmh: failed to walk /var/lib/docker/tmp/buildkit-mount1968124015/target: lstat /var/lib/docker/tmp/buildkit-mount1968124015/target: no such file or directory```

What makes you think the file you are copying exists or that you have the correct path?

It seems when Maven performs install, the /target/ directory is not in the location my path is telling it it should be. I can get it work locally, with Maven creating /target/ via "mvn clean install", but I don't know how to locate it in Railway prod. I believe I am adding the correct paths as advised by the Java provider as linked above.

Please make sure your path for that COPY command is correct.

Do you know how I can ensure the path is correct? Documentation or a working project would be very appreciated. The tree of my project after "mvn clean install" looks like this, the paths for the COPY command appearing to be in the correct location.

```$ tree -L 2
.
├── Dockerfile
├── Dockerfile.txt
├── gen
│   ├── api
│   ├── build.gradle
│   ├── build.sbt
│   ├── docs
│   ├── git_push.sh
│   ├── gradle
│   ├── gradle.properties
│   ├── gradlew
│   ├── gradlew.bat
│   ├── pom.xml
│   ├── README.md
│   ├── settings.gradle
│   └── src
├── org.ccode.pattern.rest.iml
├── pom.xml
├── README.md
├── src
│   └── main
├── target
│   ├── CCODE.pattern.rest
│   ├── CCODE.pattern.rest-classes.jar
│   ├── CCODE.pattern.rest.war
│   ├── classes
│   ├── generated-sources
│   ├── maven-archiver
│   └── maven-status
└── tomcat.8080
└── work

15 directories, 16 files
```

Have you tried COPY ./target/[CCODE.pattern.rest](CCODE.pattern.rest).war ROOT.war

Would I copy that exactly as-is with the brackets? I tried adding "./" just now with the same error:

Dockerfile:28

-------------------

26 |         apt-get install -y maven

27 |

28 | >>> COPY ./target/CCODE.pattern.rest.war ROOT.war

29 |

30 |     WORKDIR /app

-------------------

ERROR: failed to solve: failed to compute cache key: failed to calculate checksum of ref d9d17188-8002-4955-b97f-784cd897816e::26q91y7egjiy4remwqvrmw9is: failed to walk /var/lib/docker/tmp/buildkit-mount2733897827/target: lstat /var/lib/docker/tmp/buildkit-mount2733897827/target: no such file or directory

For anyone reading this: I worked around this issue by building the /target/ directory locally then pushing it up in git, as opposed to insisting Maven build in Railway.

You were trying to copy the file into the image so I had assumed the file you were trying to copy was in fact there, I'm now finding out this wasn't the case, in the future please provide more context, help me help you basically.