dockerized go-apt-cacher with config for internal use

.drone.yml

@@ -0,0 +1,12 @@
+kind: pipeline
+name: test-docker-build
+
+steps:
+- name: test-docker-build
+  image: plugins/docker
+  settings:
+    repo: sneak/go-apt-cacher
+    dry_run: true
+    tags:
+      - ${DRONE_COMMIT_SHA}
+      - ${DRONE_BRANCH}

Dockerfile

@@ -1,3 +1,23 @@
-FROM ubuntu:focal
+FROM golang:1.15-buster AS builder
 
+WORKDIR /usr/local/src
+#RUN apt update && apt install -y git
 
+RUN git clone https://github.com/cybozu-go/aptutil.git && \
+    cd aptutil && \
+    git checkout 3f82d83844818cdd6a6d7dca3eca0f76d8a3fce5
+
+WORKDIR /usr/local/src/aptutil
+RUN go mod download
+WORKDIR /usr/local/src/aptutil/cmd/go-apt-cacher
+RUN go build
+RUN find .
+
+FROM debian:buster-slim AS final
+COPY --from=builder /usr/local/src/aptutil/cmd/go-apt-cacher/go-apt-cacher /usr/local/bin/go-apt-cacher
+ADD ./go-apt-cacher.toml /etc/go-apt-cacher.toml
+RUN chmod ugoa+rx /usr/local/bin/* && \
+    mkdir -p /var/spool/go-apt-cacher && \
+    chown nobody:nogroup /var/spool/go-apt-cacher
+USER nobody:nogroup
+ENTRYPOINT ["/usr/local/bin/go-apt-cacher"]

Makefile

@@ -0,0 +1,5 @@
+docker:
+	docker build --progress plain -t sneak/go-apt-cacher .
+
+run:
+	docker run -p 8080:8080 -ti sneak/go-apt-cacher

go-apt-cacher.toml

@@ -0,0 +1,42 @@
+# listen_address is the listening address of go-apt-cacher.
+# Default is ":3142".
+listen_address = ":8080"
+
+# Interval to check updates for Release/InRelease files.
+# Default: 600 seconds
+check_interval = 600
+
+# Cache period for bad HTTP response statuses.
+# Default: 3 seconds
+cache_period = 3
+
+# Directory for meta data files.
+# The directory owner must be the same as the process owner of go-apt-cacher.
+meta_dir = "/var/spool/go-apt-cacher/meta"
+
+# Directory for non-meta data files.
+# This directory must be different from meta_dir.
+# The directory owner must be the same as the process owner of go-apt-cacher.
+cache_dir = "/var/spool/go-apt-cacher/cache"
+
+# Capacity for cache_dir.
+# Default: 1 GiB
+cache_capacity = 10
+
+# Maximum concurrent connections for an upstream server.
+# Setting this 0 disables limit on the number of connections.
+# Default: 10
+max_conns = 20
+
+# log specifies logging configurations.
+# Details at https://godoc.org/github.com/cybozu-go/well#LogConfig
+[log]
+#filename = "/var/log/go-apt-cacher.log"
+level = "info"
+format = "plain"
+
+# mapping declares which prefix maps to a Debian repository URL.
+# prefix must match this regexp: ^[a-z0-9._-]+$
+[mapping]
+ubuntu = "http://archive.ubuntu.com/ubuntu"
+security = "http://security.ubuntu.com/ubuntu"