initial Alpine support

Author: ehough

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [2.0.0] - not yet released
+
+### Changed
+ * Switch to Alpine Linux
+
 ## [1.2.0] - 2018-09-26
 
 ### Added

Dockerfile

@@ -1,17 +1,9 @@
-# Alpine can only be used if/when this bug is fixed: https://bugs.alpinelinux.org/issues/8470
-ARG BUILD_FROM=debian:stretch-slim
+ARG BUILD_FROM=alpine:latest
 
 FROM $BUILD_FROM
 
-# https://github.com/ehough/docker-nfs-server/pull/3#issuecomment-387880692
-ARG DEBIAN_FRONTEND=noninteractive
-
-# kmod is needed for lsmod, and libcap2-bin is needed for confirming Linux capabilities
-RUN apt-get update                                                                && \
-    apt-get install -y --no-install-recommends nfs-kernel-server kmod libcap2-bin && \
-    apt-get clean                                                                 && \
-    rm -rf /var/lib/apt/lists                                                     && \
-                                                                                     \
+RUN apk --update --no-cache add bash nfs-utils && \
+                                                  \
     # remove the default config files
     rm -v /etc/idmapd.conf /etc/exports
 

README.md

@@ -7,6 +7,7 @@ A lightweight, robust, flexible, and containerized NFS server.
 This is the only containerized NFS server that offers **all** of the following features:
 
 - NFS versions 3, 4, or both simultaneously
+- small (< 15MB) Alpine Linux image
 - clean teardown of services upon termination (no lingering `nfsd` processes on Docker host)
 - flexible construction of `/etc/exports`
 - extensive server configuration via environment variables
@@ -153,7 +154,6 @@ Please [open an issue](https://github.com/ehough/docker-nfs-server/issues) if yo
 
 ## Remaining tasks
 
-- switch to Alpine Linux once `nfs-utils` version 2.3.1-r4 (or higher) is released in a stable repo (maybe Alpine 3.9?). See [this bug](https://bugs.alpinelinux.org/issues/8470) for details
 - figure out why `rpc.nfsd` takes 5 minutes to startup/timeout unless `rpcbind` is running
 - add more examples, including Docker Compose