init

Dockerfile

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+FROM jenkins/inbound-agent:alpine
+
+USER root
+
+# Alpine seems to come with libcurl baked in, which is prone to mismatching
+# with newer versions of curl. The solution is to upgrade libcurl.
+RUN apk add --no-cache -u libcurl curl
+# Install Docker client
+ARG DOCKER_VERSION=24.0.6
+ARG DOCKER_COMPOSE_VERSION=1.21.0
+ARG DOCKER_BUILDX_VERSION=0.16.0
+RUN curl -fsSL https://download.docker.com/linux/static/stable/`uname -m`/docker-$DOCKER_VERSION.tgz | tar --strip-components=1 -xz -C /usr/local/bin docker/docker
+RUN curl -fsSL https://github.com/docker/compose/releases/download/$DOCKER_COMPOSE_VERSION/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose && chmod +x /usr/local/bin/docker-compose
+
+# Enable buildx plugin
+## buildx is released as amd64, and uname calls it x86_64
+RUN uname -m > /tmp/arch \
+    && sed -i 's/x86_64/amd64/g' /tmp/arch \
+    && mkdir -p /usr/libexec/docker/cli-plugins/  \
+    && curl -fsSL https://github.com/docker/buildx/releases/download/v$DOCKER_BUILDX_VERSION/buildx-v$DOCKER_BUILDX_VERSION.linux-`cat /tmp/arch` > /usr/libexec/docker/cli-plugins/docker-buildx  \
+    && chmod +x /usr/libexec/docker/cli-plugins/docker-buildx \
+    && docker buildx install \
+    && rm /tmp/arch
+
+RUN touch /debug-flag
+USER jenkins

Jenkinsfile

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+pipeline {
+  agent any
+
+  environment {
+    REGISTRY = "docker-registry.service.consul"
+    IMAGE_NAME = "efstajas/jenkins-inbound-agent-with-docker"
+  }
+
+  stages {
+    stage('Docker Build') {
+      steps {
+        script {
+          dockerImage = docker.build("$IMAGE_NAME")
+        }
+      }
+    }
+
+    stage('Docker Publish') {
+      steps {
+        script {
+          docker.withRegistry("http://$REGISTRY:4124") {
+            dockerImage.push("latest")
+          }
+        }
+      }
+    }
+  }
+}