DockerPlugin + JlinkPlugin = No java installations was detected.

[guizmaii]

I'm configuring my app to produce a zip containing my "Jlinked" app and to produce a Docker image containing the same "Jlinked" app:

lazy val api =
  project
    .in(file("modules/api"))
    .enablePlugins(BuildInfoPlugin, JavaAppPackaging, DockerPlugin, JlinkPlugin)
    .settings(noDoc: _*)
    .settings(commonSettings: _*)
    .settings(packageName := "api")
    .settings(
      // Docker settings
      Docker / dockerRepository := Some("ghcr.io"),
      Docker / packageName := packageName.value,
      dockerUpdateLatest := false,
      dockerExposedPorts := Seq(8080),
      dockerBaseImage := "ubuntu:latest",
      Docker / version := "0.0.1",
    )
    .settings(
        jlinkOptions ++= Seq(
          "--compress=2",
          "--no-man-pages",
          "--strip-debug",
          "--no-header-files",
      ),
      jlinkIgnoreMissingDependency :=
        JlinkIgnore
          .byPackagePrefix(
            ...
          )
    )

When I run sbt universal:packageBin to produce the zip. It works fine. If I unzip the file and launch the produced bin/api script my app works as expected.

But when I run sbt Docker / publishLocal and then try to run the produced Docker image: docker run ghcr.io/api:0.0.1 I have the following error:

No java installations was detected.
Please go to http://www.java.com/getjava/ and download

which is strange because the script is the same and in the script there's this line:

declare -r bundled_jvm="$(dirname "$app_home")/jre"

Here's the full produced script:

```bash #!/usr/bin/env bash ### ------------------------------- ### ### Helper methods for BASH scripts ### ### ------------------------------- ### die() { echo "$@" 1>&2 exit 1 } realpath () { ( TARGET_FILE="$1" CHECK_CYGWIN="$2" cd "$(dirname "$TARGET_FILE")" TARGET_FILE=$(basename "$TARGET_FILE") COUNT=0 while [ -L "$TARGET_FILE" -a $COUNT -lt 100 ] do TARGET_FILE=$(readlink "$TARGET_FILE") cd "$(dirname "$TARGET_FILE")" TARGET_FILE=$(basename "$TARGET_FILE") COUNT=$(($COUNT + 1)) done if [ "$TARGET_FILE" == "." -o "$TARGET_FILE" == ".." ]; then cd "$TARGET_FILE" TARGET_FILEPATH= else TARGET_FILEPATH=/$TARGET_FILE fi # make sure we grab the actual windows path, instead of cygwin's path. if [[ "x$CHECK_CYGWIN" == "x" ]]; then echo "$(pwd -P)/$TARGET_FILE" else echo $(cygwinpath "$(pwd -P)/$TARGET_FILE") fi ) } # TODO - Do we need to detect msys? # Uses uname to detect if we're in the odd cygwin environment. is_cygwin() { local os=$(uname -s) case "$os" in CYGWIN*) return 0 ;; *) return 1 ;; esac } # This can fix cygwin style /cygdrive paths so we get the # windows style paths. cygwinpath() { local file="$1" if is_cygwin; then echo $(cygpath -w $file) else echo $file fi } # Make something URI friendly make_url() { url="$1" local nospaces=${url// /%20} if is_cygwin; then echo "/${nospaces//\\//}" else echo "$nospaces" fi } # This crazy function reads in a vanilla "linux" classpath string (only : are separators, and all /), # and returns a classpath with windows style paths, and ; separators. fixCygwinClasspath() { OLDIFS=$IFS IFS=":" read -a classpath_members <<< "$1" declare -a fixed_members IFS=$OLDIFS for i in "${!classpath_members[@]}" do fixed_members[i]=$(realpath "${classpath_members[i]}" "fix") done IFS=";" echo "${fixed_members[*]}" IFS=$OLDIFS } # Fix the classpath we use for cygwin. fix_classpath() { cp="$1" if is_cygwin; then echo "$(fixCygwinClasspath "$cp")" else echo "$cp" fi } # Detect if we should use JAVA_HOME or just try PATH. get_java_cmd() { # High-priority override for Jlink images if [[ -n "$bundled_jvm" ]]; then echo "$bundled_jvm/bin/java" elif [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]]; then echo "$JAVA_HOME/bin/java" else echo "java" fi } echoerr () { echo 1>&2 "$@" } vlog () { [[ $verbose || $debug ]] && echoerr "$@" } dlog () { [[ $debug ]] && echoerr "$@" } execRunner () { # print the arguments one to a line, quoting any containing spaces [[ $verbose || $debug ]] && echo "# Executing command line:" && { for arg; do if printf "%s\n" "$arg" | grep -q ' '; then printf "\"%s\"\n" "$arg" else printf "%s\n" "$arg" fi done echo "" } # we use "exec" here for our pids to be accurate. exec "$@" } addJava () { dlog "[addJava] arg = '$1'" java_args+=( "$1" ) } addApp () { dlog "[addApp] arg = '$1'" app_commands+=( "$1" ) } addResidual () { dlog "[residual] arg = '$1'" residual_args+=( "$1" ) } addDebugger () { addJava "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=$1" } require_arg () { local type="$1" local opt="$2" local arg="$3" if [[ -z "$arg" ]] || [[ "${arg:0:1}" == "-" ]]; then die "$opt requires <$type> argument" fi } is_function_defined() { declare -f "$1" > /dev/null } # Attempt to detect if the script is running via a GUI or not # TODO - Determine where/how we use this generically detect_terminal_for_ui() { [[ ! -t 0 ]] && [[ "${#residual_args}" == "0" ]] && { echo "true" } # SPECIAL TEST FOR MAC [[ "$(uname)" == "Darwin" ]] && [[ "$HOME" == "$PWD" ]] && [[ "${#residual_args}" == "0" ]] && { echo "true" } } # Processes incoming arguments and places them in appropriate global variables. called by the run method. process_args () { local no_more_snp_opts=0 while [[ $# -gt 0 ]]; do case "$1" in --) shift && no_more_snp_opts=1 && break ;; -h|-help) usage; exit 1 ;; -v|-verbose) verbose=1 && shift ;; -d|-debug) debug=1 && shift ;; -no-version-check) no_version_check=1 && shift ;; -mem) echo "!! WARNING !! -mem option is ignored. Please use -J-Xmx and -J-Xms" && shift 2 ;; -jvm-debug) require_arg port "$1" "$2" && addDebugger $2 && shift 2 ;; -main) custom_mainclass="$2" && shift 2 ;; -java-home) require_arg path "$1" "$2" && jre=`eval echo $2` && java_cmd="$jre/bin/java" && shift 2 ;; -D*|-agentlib*|-XX*) addJava "$1" && shift ;; -J*) addJava "${1:2}" && shift ;; *) addResidual "$1" && shift ;; esac done if [[ no_more_snp_opts ]]; then while [[ $# -gt 0 ]]; do addResidual "$1" && shift done fi is_function_defined process_my_args && { myargs=("${residual_args[@]}") residual_args=() process_my_args "${myargs[@]}" } } # Actually runs the script. run() { # TODO - check for sane environment # process the combined args, then reset "$@" to the residuals process_args "$@" set -- "${residual_args[@]}" argumentCount=$# #check for jline terminal fixes on cygwin if is_cygwin; then stty -icanon min 1 -echo > /dev/null 2>&1 addJava "-Djline.terminal=jline.UnixTerminal" addJava "-Dsbt.cygwin=true" fi # check java version if [[ ! $no_version_check ]]; then java_version_check fi if [ -n "$custom_mainclass" ]; then mainclass=("$custom_mainclass") else mainclass=("${app_mainclass[@]}") fi # Now we check to see if there are any java opts on the environment. These get listed first, with the script able to override them. if [[ "$JAVA_OPTS" != "" ]]; then java_opts="${JAVA_OPTS}" fi # run sbt execRunner "$java_cmd" \ ${java_opts[@]} \ "${java_args[@]}" \ -cp "$(fix_classpath "$app_classpath")" \ "${mainclass[@]}" \ "${app_commands[@]}" \ "${residual_args[@]}" local exit_code=$? if is_cygwin; then stty icanon echo > /dev/null 2>&1 fi exit $exit_code } # Loads a configuration file full of default command line options for this script. loadConfigFile() { cat "$1" | sed $'/^\#/d;s/\r$//' } # Now check to see if it's a good enough version # TODO - Check to see if we have a configured default java version, otherwise use 1.6 java_version_check() { readonly java_version=$("$java_cmd" -version 2>&1 | awk -F '"' '/version/ {print $2}') if [[ "$java_version" == "" ]]; then echo echo No java installations was detected. echo Please go to http://www.java.com/getjava/ and download echo exit 1 else local major=$(echo "$java_version" | cut -d'.' -f1) if [[ "$major" -eq "1" ]]; then local major=$(echo "$java_version" | cut -d'.' -f2) fi if [[ "$major" -lt "6" ]]; then echo echo The java installation you have is not up to date echo $app_name requires at least version 1.6+, you have echo version $java_version echo echo Please go to http://www.java.com/getjava/ and download echo a valid Java Runtime and install before running $app_name. echo exit 1 fi fi } ### ------------------------------- ### ### Start of customized settings ### ### ------------------------------- ### usage() { cat < Define a custom main class -jvm-debug Turn on JVM debugging, open at the given port. # java version (default: java from PATH, currently $(java -version 2>&1 | grep version)) -java-home alternate JAVA_HOME # jvm options and output control JAVA_OPTS environment variable, if unset uses "$java_opts" -Dkey=val pass -Dkey=val directly to the java runtime -J-X pass option -X directly to the java runtime (-J is stripped) # special option -- To stop parsing built-in commands from the rest of the command-line. e.g.) enabling debug and sending -d as app argument \$ ./start-script -d -- -d In the case of duplicated or conflicting options, basically the order above shows precedence: JAVA_OPTS lowest, command line options highest except "--". Available main classes: "" EOM } ### ------------------------------- ### ### Main script ### ### ------------------------------- ### declare -a residual_args declare -a java_args declare -a app_commands declare -r real_script_path="$(realpath "$0")" declare -r app_home="$(realpath "$(dirname "$real_script_path")")" # TODO - Check whether this is ok in cygwin... declare -r lib_dir="$(realpath "${app_home}/../lib")" declare -a app_mainclass=("") declare -r script_conf_file="${app_home}/../conf/application.ini" declare -r app_classpath="" declare -r bundled_jvm="$(dirname "$app_home")/jre" # java_cmd is overrode in process_args when -java-home is used declare java_cmd=$(get_java_cmd) # if configuration files exist, prepend their contents to $@ so it can be processed by this runner [[ -f "$script_conf_file" ]] && set -- $(loadConfigFile "$script_conf_file") "$@" run "$@" ```

[uryyyyyyy]

I also have a same error, does anyone knows the solution? I can see this output, but don't know how docker image run with this jre.

Running: jlink --output <root>/target/jlink/output --add-modules java.logging,java.management,java.naming,java.compiler,java.base,java.desktop,java.transaction.xa,java.sql,java.security.sasl,java.datatransfer,java.security.jgss,java.xml

[guizmaii]

does anyone knows the solution?

My problem was that I was packaging the app on my Mac but running the Jlink'ed app in a Linux Docker. The packaged JRE was a Mac one which doesn't work on Linux :)

[uryyyyyyy]

ah, Thanks a lot! I could build / run my system on Linux.