Add support for RISC-V

.drone.yml

@@ -133,6 +133,48 @@ volumes:
   host:
     path: /var/run/docker.sock
 
+---
+kind: pipeline
+name: risv64
+type: docker
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: build
+  image: rancher/dapper:v0.5.0
+  commands:
+  - ARCH=riscv64 dapper ci
+  volumes:
+  - name: docker
+    path: /var/run/docker.sock
+
+- name: docker-publish
+  image: plugins/docker
+  settings:
+    dockerfile: package/Dockerfile
+    password:
+      from_secret: docker_password
+    repo: "rancher/klipper-lb"
+    tag: "${DRONE_TAG}-riscv64"
+    username:
+      from_secret: docker_username
+  when:
+    instance:
+    - drone-publish.k3s.io
+    ref:
+    - refs/head/master
+    - refs/tags/*
+    event:
+    - tag
+
+volumes:
+- name: docker
+  host:
+    path: /var/run/docker.sock
+
 ---
 kind: pipeline
 name: arm
@@ -199,6 +241,7 @@ steps:
       - linux/arm64
       - linux/arm
       - linux/s390x
+      - linux/riscv64
     target: "rancher/klipper-lb:${DRONE_TAG}"
     template: "rancher/klipper-lb:${DRONE_TAG}-ARCH"
   when:
@@ -215,3 +258,4 @@ depends_on:
 - arm64
 - arm
 - s390x
+- riscv64

Dockerfile.dapper

@@ -1,14 +1,14 @@
 FROM golang:1.20-alpine3.16
 
 ARG DAPPER_HOST_ARCH
-ENV ARCH $DAPPER_HOST_ARCH
+ENV HOST_ARCH $DAPPER_HOST_ARCH
 
 RUN apk -U add bash git gcc musl-dev docker vim less file curl wget ca-certificates
 RUN if [ "$(go env GOARCH)" = "amd64" ]; then \
     curl -sL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s v1.40.0; \
     fi
 
-ENV DAPPER_ENV REPO TAG DRONE_TAG
+ENV DAPPER_ENV REPO TAG DRONE_TAG ARCH
 ENV DAPPER_SOURCE /go/src/github.com/rancher/klipper-lb/
 ENV DAPPER_OUTPUT ./bin ./dist
 ENV DAPPER_DOCKER_SOCKET true

package/Dockerfile

@@ -1,4 +1,5 @@
-FROM alpine:3.18
+ARG BASE=alpine:3.18
+FROM $BASE
 ARG BUILDDATE
 LABEL buildDate=$BUILDDATE
 RUN apk --no-cache upgrade && \

scripts/package

@@ -21,5 +21,9 @@ if [ -e ${DOCKERFILE}.${ARCH} ]; then
     DOCKERFILE=${DOCKERFILE}.${ARCH}
 fi
 
-docker build --build-arg BUILDDATE=$(date +%Y%m%d) -f ${DOCKERFILE} -t ${IMAGE} .
+if [ "$ARCH" = "riscv64" ]; then
+    export DOCKER_BUILDKIT=1
+    DOCKER_ARGS="--platform=$ARCH --build-arg BASE=riscv64/alpine:edge"
+fi
+docker build ${DOCKER_ARGS} --build-arg BUILDDATE=$(date +%Y%m%d) -f ${DOCKERFILE} -t ${IMAGE} .
 echo Built ${IMAGE}