URLShortener/Dockerfile

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Docker
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#syntax=docker/dockerfile:1
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# Add the following lines to tag the image (replace 'your_username' and 'shortener-app' with your Docker Hub username and repository name)
ARG VERSION=latest
ARG IMAGE_NAME=nmpl/shortener
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ARG TAG=$VERSION
#
#------STAGE 1: Build the application-----#
#
# Get Maven with JDK 21
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FROM maven:3.9.6-eclipse-temurin-21 AS builder
#Cloud Install : Clone the repository
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RUN git clone https://github.com/aamitn/URLShortener.git
#Local Install
#ADD . /UrlShortener
# Change working directory to the repo directory
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WORKDIR /URLShortener
# Docker makes db accessible like this : mysql://<container-name>:port instead of mysql://<server-ip>:port
# Example real world db access url : mysql://127.0.0.1:3306
# Example Docker db access url : mysql://database:3306 (container name is datbase)
# Change the database ip in app config to the database docker container name/service
RUN sed -i "s|database.ip=127.0.0.1|database.ip=db |g" src/main/resources/application.properties
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# Build the application
RUN mvn clean install
#
#------STAGE 2: Deploy the Generated War-----#
#
## Get Tomacat 10 with JDK21
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FROM tomcat:10-jdk21-openjdk-slim
# Set environment variables
ENV CATALINA_BASE /usr/local/tomcat
ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
# Copy the WAR file from the builder stage
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COPY --from=builder /URLShortener/target/shortener.war $CATALINA_BASE/webapps/
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#
#------STAGE 3: Configure and Start Application Server-----#
#
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# Add configuration for document base path
COPY server.xml $CATALINA_BASE/conf/server.xml
# Expose ports
EXPOSE 8080
# Start Tomcat and MariaDB using the startup script
CMD ["catalina.sh", "run"]