COPY command unable to find files/dir on host machine

[masonedmison]

Expected behaviour

I want to copy a directory from the host machine to the container using a command like

    dockerCommands := dockerCommands.value.flatMap {
      case Cmd("FROM", args @ _*) if args.contains("stage0") && args.contains("openjdk:11-jre-slim-buster") =>
        Seq(
          Cmd("FROM", args: _*),
          Cmd("COPY", "C:/Users/edmisml/scalaprojects/cici/certs/toKeyStore", "/certs")
        )

within my sbt.

Actual behaviour

when I docker:publishLocal it errors out at

[error]  > [stage0 2/8] COPY C:/Users/edmisml/scalaprojects/cici/certs/toKeyStore /certs:
[error] ------
[error] failed to compute cache key: "/C:/Users/edmisml/scalaprojects/cici/certs/toKeyStore" not found: not found

I thought that by inserting the COPY command after the initial FROM command (stage0) that I would indeed be able to copy files from the host machine but this does not appear to be the case.

Can someone help me out here?

Here's the out of show dockerCommands:

[info] * Cmd(FROM,WrappedArray(openjdk:11-jre-slim-buster, as, stage0))
[info] * Cmd(COPY,WrappedArray(C:/Users/edmisml/scalaprojects/cici/certs/toKeyStore, /certs))
[info] * Cmd(LABEL,WrappedArray(snp-multi-stage="intermediate"))
[info] * Cmd(LABEL,WrappedArray(snp-multi-stage-id="4961b11a-cbaa-4619-9759-2ef8e086bd75"))
[info] * Cmd(WORKDIR,WrappedArray(/opt/docker))
[info] * Cmd(COPY,WrappedArray(2/opt /2/opt))
[info] * Cmd(COPY,WrappedArray(4/opt /4/opt))
[info] * Cmd(USER,WrappedArray(root))
[info] * ExecCmd(RUN,List(chmod, -R, u=rX,g=rX, /2/opt/docker))
[info] * ExecCmd(RUN,List(chmod, -R, u=rX,g=rX, /4/opt/docker))
[info] * ExecCmd(RUN,List(chmod, u+x,g+x, /4/opt/docker/bin/cici-core))
[info] * DockerStageBreak
[info] * Cmd(FROM,WrappedArray(openjdk:11-jre-slim-buster, as, mainstage))
[info] * Cmd(USER,WrappedArray(root))
[info] * Cmd(RUN,List(id, -u, demiourgos728, 1>/dev/null, 2>&1, ||, ((, getent, group, 0, 1>/dev/null, 2>&1, ||, (, type, groupadd, 1>/dev/null, 2>&1, &&, groupadd, -g, 0, root, ||, addgroup, -g, 0, -S, root, )), &&, (, type, useradd, 1>/dev/null, 2>&1, &&, useradd, --system, --create-home, --uid, 1001, --gid, 0, demiourgos728, ||, adduser, -S, -u, 1001, -G, root, demiourgos728, ))))
[info] * Cmd(WORKDIR,WrappedArray(/opt/docker))
[info] * Cmd(COPY,WrappedArray(--from=stage0 --chown=demiourgos728:root /2/opt/docker /opt/docker))
[info] * Cmd(COPY,WrappedArray(--from=stage0 --chown=demiourgos728:root /4/opt/docker /opt/docker))
[info] * Cmd(EXPOSE,WrappedArray(8080))
[info] * ExecCmd(RUN,List(mkdir, -p, ./certs/toKeyStore))
[info] * ExecCmd(RUN,List(chown, -R, demiourgos728:root, ./certs/toKeyStore))
[info] * ExecCmd(VOLUME,List(./certs/toKeyStore))
[info] * ExecCmd(CMD,WrappedArray(mkdir, /certs/))
[info] * Cmd(COPY,WrappedArray(--from=stage0, /certs/, /certs/))
[info] * ExecCmd(RUN,WrappedArray(echo, $JAVA_HOME))
[info] * Cmd(USER,WrappedArray(root))
[info] * ExecCmd(RUN,WrappedArray(pwd))
[info] * ExecCmd(RUN,WrappedArray(ls, /))
[info] * ExecCmd(RUN,WrappedArray(ls, /certs))
[info] * ExecCmd(RUN,WrappedArray(keytool, -importcert, -alias, globalRoot, -trustcacerts, -keystore, $JAVA_HOME/jre/lib/security/cacerts, -storepass, changeit, -noprompt, -file, 
/opt/docker/certs/two.cer))
[info] * ExecCmd(RUN,WrappedArray(keytool, -importcert, -alias, globalRoot, -trustcacerts, -keystore, $JAVA_HOME/jre/lib/security/cacerts, -storepass, changeit, -noprompt, -file, 
/opt/docker/certs/one.cer))
[info] * Cmd(USER,WrappedArray(1001:0))
[info] * ExecCmd(ENTRYPOINT,List(/opt/docker/bin/cici-core))
[info] * ExecCmd(CMD,List())

Information

• What sbt-native-packager are you using 1.9.7
• What sbt version 1.5.5
• What is your build system (e.g. Ubuntu, MacOS, Windows, Debian ) Windows
• What package are you building (e.g. docker, rpm, ...) docker
• What version has your build tool (find out with e.g. rpm --version)
• What is your target system (e.g. Ubuntu 16.04, CentOS 7) Ubuntu

[dwickern]

Docker can only access files in its build context. So you will have to copy any additional files to Docker / stagingDirectory, otherwise Docker won't see them.

[masonedmison]

Is there a programmatic way to do this? It looks like by default the "stage" directory is <module>/target/docker/stage.

As another approach, I tried to add a mapping tupe using Docker / fileMappings but that did not seem to have any effect on the Dockerfile nor did it add anything to the staging directory.

[dwickern]

Try this:

Docker / dockerPackageMappings += file("/path/to/file.txt") -> "out.txt"