Dockerfile.alpine

# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Use the latest stable golang 1.x to compile to a binary
FROM golang:1 as build

WORKDIR /go/src/cloudsql-proxy
COPY . .

RUN go get ./...
RUN go build -ldflags "-X main.metadataString=container.alpine" -o cloud_sql_proxy ./cmd/cloud_sql_proxy

# Final stage
FROM alpine:3
RUN apk add --no-cache \ 
    ca-certificates \
    libc6-compat
# Install fuse and allow enable non-root users to mount
RUN apk add --no-cache fuse && sed -i 's/^#user_allow_other$/user_allow_other/g' /etc/fuse.conf
# Add a non-root user matching the nonroot user from the main container
RUN addgroup -g 65532 -S nonroot && adduser -u 65532 -S nonroot -G nonroot
# Set the uid as an integer for compatibility with runAsNonRoot in Kubernetes
USER 65532

COPY --from=build --chown=nonroot /go/src/cloudsql-proxy/cloud_sql_proxy /cloud_sql_proxy