Use multistage builds to reduce image size

Signed-off-by: Ben Johnson <[email protected]>

Author: binarylogic

distribution/docker/alpine/Dockerfile

@@ -1,17 +1,21 @@
-FROM alpine:latest
+FROM alpine:latest AS builder
 
 LABEL MAINTAINER="Vector Contributors <[email protected]>"
 
 ENV VECTOR_VERSION latest
 
+WORKDIR /scripts
+
 # Downloading Vector
 ADD https://packages.timber.io/vector/${VECTOR_VERSION}/vector-${VECTOR_VERSION}-x86_64-unknown-linux-musl.tar.gz ./
 
 # Installing packages
 RUN mkdir vector && \
     mkdir /etc/vector && \
     tar -xzf vector-${VECTOR_VERSION}-x86_64-unknown-linux-musl.tar.gz --directory="vector" --strip-components=2 && \
-    cp -a vector/bin/. /usr/local/bin && \
-    cp -a vector/config/. /etc/vector && \
-    rm vector-${VECTOR_VERSION}-x86_64-unknown-linux-musl.tar.gz && \
-    rm -rf vector
+    cp -a vector/config/. /etc/vector
+
+FROM alpine:latest
+
+COPY --from=builder /scripts/vector/bin/* /usr/local/bin/
+COPY --from=builder /etc/vector /etc

docs/setup/installation/platforms/docker.md

@@ -24,6 +24,10 @@ docker run -v $PWD/vector.toml:/etc/vector/vector.toml:ro timberio/vector:latest
 docker run -v $PWD/vector.toml:/etc/vector/vector.toml:ro timberio/vector-slim:latest
 ```
 {% endcode-tabs-item %}
+{% code-tabs-item title="alpine" %}
+```bash
+docker run -v $PWD/vector.toml:/etc/vector/vector.toml:ro timberio/vector-alpine:latest
+```
 {% endcode-tabs %}
 
 Modify `$PWD` to the directory where you store your local `vector.toml` file.