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Docker: build rest-server at container build time

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Using docker's multi-stage builds we can build the restic/rest-server
within a golang build environment then create a container for use
(without the build environment) in a second build stage.

The advantages are:

1. Building the rest-server is predictable in a pristine environment
   each time.
2. Container builds ensure we get the latest rest-server every time.

Updated README with details of new docker build approach, and added
changelog for unreleased changes.
This commit is contained in:
Jinn Koriech 2021-03-25 08:56:55 +00:00
parent 10dc7a4a86
commit 3a4d901f6d
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3 changed files with 23 additions and 2 deletions
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13
Dockerfile
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@ -1,3 +1,14 @@
FROM golang:alpine AS builder
ENV CGO_ENABLED 0
COPY . /build
WORKDIR /build
RUN go build -o rest-server ./cmd/rest-server
FROM alpine
ENV DATA_DIRECTORY /data
@ -8,7 +19,7 @@ RUN apk add --no-cache --update apache2-utils
COPY docker/create_user /usr/bin/
COPY docker/delete_user /usr/bin/
COPY docker/entrypoint.sh /entrypoint.sh
COPY rest-server /usr/bin
COPY --from=builder /build/rest-server /usr/bin
VOLUME /data
EXPOSE 8000

7
README.md
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@ -19,11 +19,15 @@ The required version of restic backup client to use with `rest-server` is [v0.7.
For building the `rest-server` binary run `CGO_ENABLED=0 go build -o rest-server ./cmd/rest-server`
## Docker
### Build image
Put the `rest-server` binary in the current directory, then run:
The docker image build process will build a fresh version of the rest-server and package that into
a usable container.
To build the binary along with the container run:
docker build -t restic/rest-server:latest .
@ -32,6 +36,7 @@ Put the `rest-server` binary in the current directory, then run:
docker pull restic/rest-server
## Usage
To learn how to use restic backup client with REST backend, please consult [restic manual](https://restic.readthedocs.io/en/latest/030_preparing_a_new_repo.html#rest-server).

5
changelog/unreleased/issue-146 Normal file
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@ -0,0 +1,5 @@
Build rest-server at docker container build time
Add a build stage such that the latest rest-server is always built and packaged.
This is done in a standard golang container to ensure a clean build environment
and only the final binary is shipped rather than the whole build environment.