Renovation

.dockerignore

@@ -0,0 +1,7 @@
+.dockerignore
+.git
+.github
+Dockerfile
+LICENSE
+README.md
+tests/

.github/workflows/build-push.yml

@@ -1,4 +1,6 @@
-# Panubo build and push to Quay.io and ECR Public
+# Source: https://github.com/panubo/reference-github-actions/blob/main/docker-images/build-push.yml
+#
+# Description: Panubo build and push to Quay.io and ECR Public
 # This GH Action is intended for public docker images that package upstream applications/services (ie not for projects of Panubo's).
 # For repos that build multiple repos use the multi-build-push.yml workflow.
 #
@@ -9,6 +11,8 @@
 # Automated testing is triggered by `make _ci_test`, if no test is required the Makefile target should just run `true`.
 # Before tests are run a Docker build is performed, the resulting image has a tag of "test"
 # BATS is installed since it is commonly required by the tests.
+#
+# LICENSE: MIT License, Copyright (c) 2021-2025 Volt Grid Pty Ltd t/a Panubo
 
 name: build and push on main and tags
 
@@ -33,7 +37,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v5
+        with:
+          submodules: true
 
       - name: Get repo name
         id: image_name
@@ -42,7 +48,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           # list of Docker images to use as base name for tags
           images: |
@@ -59,28 +65,28 @@ jobs:
             # type=sha
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
 
       # The values provided to these two AWS steps are always the same for Panubo owned repos
       - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@v1-node16
+        uses: aws-actions/configure-aws-credentials@v4
         with:
           role-to-assume: ${{ env.GITHUB_ROLE_ARN }}
           aws-region: us-east-1
 
       - name: Login to ECR
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: public.ecr.aws
 
       - name: Login to Quay.io
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: quay.io
           username: ${{ secrets.PANUBUILD_QUAYIO_USERNAME }}
@@ -92,7 +98,7 @@ jobs:
           bats-version: 1.7.0
 
       - name: Build and export to Docker
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           builder: ${{ steps.buildx.outputs.name }}
           cache-from: type=gha
@@ -104,7 +110,7 @@ jobs:
           make _ci_test
 
       - name: Build and Push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v6
         with:
           builder: ${{ steps.buildx.outputs.name }}
           push: ${{ github.event_name != 'pull_request' }}

Dockerfile

@@ -1,4 +1,6 @@
-FROM alpine:3.19
+# Does not build beyond alpine:3.20, may require upstream fixes for gcc15 and
+# legacy C library functions eg fcvt, ecvt, and gcvt
+FROM alpine:3.20
 
 ENV XINETD_VERSION=2.3.15.4
 
@@ -11,7 +13,7 @@ RUN set -x \
   && ./configure \
   && make \
   && make install \
-  && install -m 0644 -D -t /etc/xinetd.d /tmp/xinetd-2.3.15.4/contrib/xinetd.d/* \
+  && install -m 0644 -D -t /etc/xinetd.d /tmp/xinetd-${XINETD_VERSION}/contrib/xinetd.d/* \
   && apk --no-cache del xz build-base \
   && cd / \
   && rm -rf /tmp/* \
@@ -21,8 +23,12 @@ COPY s6/ /etc/s6/
 COPY xinetd.conf /etc/xinetd.conf
 
 RUN set -x \
-  && sed -i 's/disable.*/disable\t\t= no/' /etc/xinetd.d/time \
-  && sed -i 's/disable.*/disable\t\t= no/' /etc/xinetd.d/time-udp \
+  # Enable the services
+  && sed -i 's/disable.*/disable\t\t= no/' /etc/xinetd.d/time /etc/xinetd.d/time-udp \
+  # Use same underprivileged user as xinetd daemon
+  && sed -i 's/user.*/user\t\t= 1000/' /etc/xinetd.d/time /etc/xinetd.d/time-udp \
+  # List the UDP service: "2 available services"
+  && sed -i 's/\ttype.*/\ttype\t\t= INTERNAL/' /etc/xinetd.d/time /etc/xinetd.d/time-udp \
   ;
 
 EXPOSE 37/tcp

Makefile

@@ -1,15 +1,19 @@
 IMAGE_NAME := alpine-xinetd
 
-build:
+.PHONY: *
+help:
+	@printf "$$(grep -hE '^\S+:.*##' $(MAKEFILE_LIST) | sed -e 's/:.*##\s*/:/' -e 's/^\(.\+\):\(.*\)/\\x1b[36m\1\\x1b[m:\2/' | column -c2 -t -s :)\n"
+
+build: ## Build for publishing
 	docker build -t panubo/$(IMAGE_NAME) .
 
-run:
+run: ## Run container normally
 	docker run -p 37:37/udp -p 37:37/tcp --rm -it --name time-server panubo/$(IMAGE_NAME)
 
 # run-non-root:
 # 	docker run --cap-add CAP_NET_BIND_SERVICE --user 1000:1000 -p 37:37/udp -p 37:37/tcp --rm -it --name time-server panubo/$(IMAGE_NAME)
 
-shell:
+shell: ## Run sh
 	docker run --rm -it panubo/$(IMAGE_NAME) sh
 
 _ci_test:

README.md

@@ -1,13 +1,65 @@
 # Time Protocol Server (RFC 868)
 
-This is an [RFC 868](https://datatracker.ietf.org/doc/html/rfc868/) [Time Protocol](https://en.wikipedia.org/wiki/Time_Protocol) Server implemented with [openSUSE/xinetd](https://github.com/openSUSE/xinetd).
+This is an [RFC 868](https://datatracker.ietf.org/doc/html/rfc868/) [Time Protocol](https://en.wikipedia.org/wiki/Time_Protocol) Server implemented with [openSUSE/xinetd](https://github.com/openSUSE/xinetd) running on Alpine Linux.
 
-## Client
+The image is lightweight and suitable for production use.
 
+## Building the image
+
+You can build the image using the provided `Makefile`:
+
+```bash
+make build
+```
+
+This will build the Docker image with the name `panubo/alpine-xinetd`.
+
+## Running the server
+
+To run the time server, you can use the `run` target in the `Makefile`:
+
+```bash
+make run
 ```
+
+This will start the container and map the necessary ports (37/tcp and 37/udp).
+
+## Testing
+
+### Client Example
+
+You can test the server using tools like `socat` or `rdate`.
+
+```bash
+# Test UDP
 socat -x - UDP4-DATAGRAM:127.0.0.1:37
+
+# Test TCP
 socat -x - TCP-CONNECT:127.0.0.1:37
 
-# rdate is part of busybox
+# Using rdate (part of busybox)
 rdate -p 127.0.0.1
 ```
+
+### JMeter Load Tests
+
+The project includes a JMeter test plan to verify the server's functionality. To run the tests, you need to have Docker installed.
+
+First, build the JMeter test image:
+
+```bash
+cd tests/jmeter
+make build
+```
+
+Then, run the tests:
+
+```bash
+make run-test
+```
+
+This will execute the test plan `Test Plan.jmx` and connect to a local instance of time-server running on localhost / UDP port 37.
+
+## Status
+
+Stable and production ready.

tests/jmeter/Dockerfile

@@ -1,17 +1,18 @@
-FROM alpine:3.16
+FROM alpine:3.20
 
 ENV \
-  JMETER_URL=https://dlcdn.apache.org//jmeter/binaries/apache-jmeter-5.5.tgz
+  JMETER_VER=5.6.3 \
+  JMETER_URL=https://archive.apache.org/dist/jmeter/binaries/apache-jmeter-5.6.3.tgz
 
 RUN set -x \
-  && apk --no-cache add openjdk8 curl \
-  && curl -sSf "${JMETER_URL}" -o /tmp/apache-jmeter-5.5.tgz \
+  && apk --no-cache add openjdk8 curl socat \
+  && curl -sSf "${JMETER_URL}" -o /tmp/apache-jmeter-${JMETER_VER}.tgz \
   ;
 
 RUN set -x \
-  && tar -C /opt -zxf /tmp/apache-jmeter-5.5.tgz \
+  && tar -C /opt -zxf /tmp/apache-jmeter-${JMETER_VER}.tgz \
   && curl -sSf https://jmeter-plugins.org/files/packages/jpgc-udp-0.4.zip -o /tmp/jpgc-udp-0.4.zip \
   && curl -sSf https://jmeter-plugins.org/files/packages/jpgc-casutg-2.10.zip -o /tmp/jpgc-casutg-2.10.zip \
-  && unzip -d /opt/apache-jmeter-5.5 /tmp/jpgc-udp-0.4.zip \
-  && unzip -d /opt/apache-jmeter-5.5 /tmp/jpgc-casutg-2.10.zip \
+  && unzip -d /opt/apache-jmeter-${JMETER_VER} /tmp/jpgc-udp-0.4.zip \
+  && unzip -d /opt/apache-jmeter-${JMETER_VER} /tmp/jpgc-casutg-2.10.zip \
   ;

tests/jmeter/Makefile

@@ -1,8 +1,12 @@
+JMETER_VER := 5.6.3
+
+.PHONY: *
+
 build:
 	docker build -t panubo/time-server-jmeter .
 
 run:
-	docker run --rm -it panubo/time-server-jmeter sh
+    docker run --rm -it -v $(PWD):/workdir --workdir /workdir --user $(shell id -u) panubo/time-server-jmeter sh
 
 run-test:
-	docker run --rm -it -v $(PWD):/workdir --workdir /workdir --user $(shell id -u) panubo/time-server-jmeter /opt/apache-jmeter-5.5/bin/jmeter.sh -n -t "Test Plan.jmx" -l my_results.jtl
+	docker run --rm -it -v $(PWD):/workdir --workdir /workdir --user $(shell id -u) panubo/time-server-jmeter /opt/apache-jmeter-${JMETER_VER}/bin/jmeter.sh -n -t "Test Plan.jmx" -l my_results.jtl

xinetd.conf

@@ -20,7 +20,7 @@ defaults
 	log_type	= FILE /tmp/xinetd.log
 
 # Define general logging characteristics.
-#	log_type	= SYSLOG daemon info 
+#	log_type	= SYSLOG daemon info
 #	log_on_failure	= HOST ATTEMPT
 #	log_on_success	= HOST EXIT DURATION
 
@@ -59,5 +59,5 @@ defaults
 #	banner_success	=
 }
 
-includedir /etc/xinetd.d
- 
+include /etc/xinetd.d/time
+include /etc/xinetd.d/time-udp