chore: add timberio/vector-alpine docker image

.metadata.toml

@@ -1251,6 +1251,7 @@ configuration = "https://docs.vector.dev/usage/configuration"
 crc = "https://en.wikipedia.org/wiki/Cyclic_redundancy_check"
 default_configuration = "https://github.com/timberio/vector/blob/master/config/vector.toml"
 docker = "https://www.docker.com/"
+docker_alpine = "https://hub.docker.com/_/alpine"
 dockerfile = "https://github.com/timberio/vector/blob/master/Dockerfile"
 docker_hub_vector = "https://hub.docker.com/r/timberio/vector"
 docs = "https://docs.vector.dev"
@@ -1272,6 +1273,7 @@ kafka = "https://kafka.apache.org/"
 kafka_partitioning_docs = "https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-Partitioningandbootstrapping"
 kafka_protocol = "https://kafka.apache.org/protocol"
 kubernetes_limit_resources = "https://kubernetes.io/docs/tasks/configure-pod-container/assign-cpu-resource/"
+leveldb = "https://github.com/google/leveldb"
 lua = "https://www.lua.org/"
 lua_docs = "https://www.lua.org/manual/5.3/"
 lua_manual = "http://www.lua.org/manual/5.1/manual.html"
@@ -1285,6 +1287,7 @@ new_source = "https://github.com/timberio/vector/issues/new?labels=Type%3A+New+F
 new_transform = "https://github.com/timberio/vector/issues/new?labels=Type%3A+New+Feature"
 nginx = "https://www.nginx.com/"
 prometheus = "https://prometheus.io/"
+rdkafka = "https://github.com/edenhill/librdkafka"
 regex = "https://en.wikipedia.org/wiki/Regular_expression"
 regex_grouping_and_flags = "https://docs.rs/regex/1.1.7/regex/#grouping-and-flags"
 regex_tester = "https://regex-golang.appspot.com/assets/html/index.html"

distribution/docker/alpine/Dockerfile

@@ -0,0 +1,21 @@
+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/config/. /etc/vector
+
+FROM alpine:latest
+
+COPY --from=builder /scripts/vector/bin/* /usr/local/bin/
+COPY --from=builder /etc/vector /etc

docs/setup/installation/manual/from-archives.md

@@ -18,17 +18,18 @@ architectures. If you don't see an architecture, then we recommend
 
 {% tabs %}
 {% tab title="Latest" %}
-"Latest" represents the latest stable release.
+"Latest" represents the latest [released version][url.releases].
 
 | Architecture | Channel | Notes |
 | :------------| :-----: | :---- |
 | [`x86_64-apple-darwin`][url.vector_latest_x86_64-apple-darwin] | `latest` | 64-bit OSX (10.7+, Lion+) |
 | [`uknown-linux-gnu`][url.vector_latest_x86_64-unknown-linux-gnu] | `latest` | 64-bit Linux (2.6.18+) |
-| [`uknown-linux-musl`][url.vector_latest_x86_64-unknown-linux-musl] | `latest` | 64-bit Linux with MUSL |
+| ⚠️ [`uknown-linux-musl`][url.vector_latest_x86_64-unknown-linux-musl] | `latest` | 64-bit Linux with MUSL |
 
 {% endtab %}
 {% tab title="Edge" %}
-"Edge" represents build off of the latest version of `master`.
+"Edge" builds are continuous and built after every change merged into
+the [`master` repo branch][url.vector_repo].
 
 {% hint style="warning" %}
 This release could have bugs or other issues. Please think carefully before
@@ -39,10 +40,13 @@ using them over the "latest" alternatives.
 | :------------| :-----: | :---- |
 | [`x86_64-apple-darwin`][url.vector_edge_x86_64-apple-darwin] | `edge` | 64-bit OSX (10.7+, Lion+) |
 | [`uknown-linux-gnu`][url.vector_edge_x86_64-unknown-linux-gnu] | `edge` | 64-bit Linux (2.6.18+) |
-| [`uknown-linux-musl`][url.vector_edge_x86_64-unknown-linux-musl] | `edge` | 64-bit Linux with MUSL |
+| ⚠️ [`uknown-linux-musl`][url.vector_edge_x86_64-unknown-linux-musl] | `edge` | 64-bit Linux with MUSL |
 {% endtab %}
 {% endtabs %}
 
+⚠️ = This release is limited, it does not support on-disk buffers or the [`kafka` sink][docs.kafka_sink]. See the [Limited Releases](#limited-releases) section for more info.
+
+
 ## Installation
 
 Change into the directory you want to install Vector, such as your home dir:
@@ -124,6 +128,21 @@ If you plan to run Vector under a separate user, be sure that the directory
 is writable by the `vector` process.
 {% endhint %}
 
+## Limited Releases
+
+For certain release targets Vector releases limited builds. These builds lack
+the following features:
+
+1. On-disk buffers.
+2. The [`kafka` sink][docs.kafka_sink].
+
+The reason these features are not included is due to the libraries required
+to power them. Specifically, we use [`leveldb`][url.leveldb] and
+[`rdkafka`][url.rdkafka] to power these features. Unforutnately, compiling
+and/or statically linking these libraries has proven to be a challenge. This
+is something we are working to resolve. You can track progress on
+[issue 546][url.issue_661].
+
 ## Service Managers
 
 Vector archives ship with service files in case you need them:
@@ -152,10 +171,17 @@ Simply follow the same [installation instructions above](#installation).
 [docs.configuration]: ../../../usage/configuration
 [docs.data_directory]: ../../../usage/configuration/README.md#data-directory
 [docs.from_source]: ../../../setup/installation/manual/from-source.md
+[docs.kafka_sink]: ../../../usage/configuration/sinks/kafka.md
 [docs.package_managers]: ../../../setup/installation/package-managers
 [docs.platforms]: ../../../setup/installation/platforms
+[url.issue_661]: https://github.com/timberio/vector/issues/661
+[url.leveldb]: https://github.com/google/leveldb
+[url.rdkafka]: https://github.com/edenhill/librdkafka
 [url.releases]: https://github.com/timberio/vector/releases
 [url.vector_edge_x86_64-apple-darwin]: https://packages.timber.io/vector/edge/vector-edge-x86_64-apple-darwin.tar.gz
 [url.vector_edge_x86_64-unknown-linux-gnu]: https://packages.timber.io/vector/edge/vector-edge-x86_64-unknown-linux-gnu.tar.gz
+[url.vector_edge_x86_64-unknown-linux-musl]: https://packages.timber.io/vector/edge/vector-edge-x86_64-unknown-linux-musl.tar.gz
 [url.vector_latest_x86_64-apple-darwin]: https://packages.timber.io/vector/latest/vector-latest-x86_64-apple-darwin.tar.gz
 [url.vector_latest_x86_64-unknown-linux-gnu]: https://packages.timber.io/vector/latest/vector-latest-x86_64-unknown-linux-gnu.tar.gz
+[url.vector_latest_x86_64-unknown-linux-musl]: https://packages.timber.io/vector/latest/vector-latest-x86_64-unknown-linux-musl.tar.gz
+[url.vector_repo]: https://github.com/timberio/vector

docs/setup/installation/platforms/docker.md

@@ -24,6 +24,14 @@ 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" %}
+{% hint style="warning" %}
+This target is limited, it does not support on-disk buffers or the [`kafka` sink][docs.kafka_sink]. See the [Limited Releases][docs.from-archives.limited-releases] section for more info.
+{% endhint %}
+
+```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.
@@ -70,6 +78,12 @@ possible is desired. To minimize image size, it's uncommon for additional
 related tools (such as git or bash) to be included. Using this image as a
 base, add the things you need in your own Dockerfile.
 
+### timberio/vector-alpine:<version>
+
+This image is based on [`alpine:latest`][url.docker_alpine] which is a Linux
+distribution built around musl libc and BusyBox. It is considerably smaller in
+size than other Docker images and statically links libraries.
+
 ## Versions
 
 Timber's Docker images include a special `latest` version that will be updated
@@ -91,8 +105,11 @@ docker run timberio/vector:latest
 
 
 [docs.configuration]: ../../../usage/configuration
+[docs.from-archives.limited-releases]: ../../../setup/installation/manual/from-archives.md#limited-releases
+[docs.kafka_sink]: ../../../usage/configuration/sinks/kafka.md
 [docs.starting]: ../../../usage/administration/starting.md
 [url.default_configuration]: https://github.com/timberio/vector/blob/master/config/vector.toml
+[url.docker_alpine]: https://hub.docker.com/_/alpine
 [url.docker_hub_vector]: https://hub.docker.com/r/timberio/vector
 [url.releases]: https://github.com/timberio/vector/releases
 [url.systemd]: https://www.freedesktop.org/wiki/Software/systemd/

docs/usage/administration/env-vars.md

@@ -18,5 +18,6 @@ More options can be set with [flags][docs.starting.flags] when
 
 
 [docs.monitoring.logs]: ../../usage/administration/monitoring.md#logs
+[docs.sinks]: ../../usage/configuration/sinks
 [docs.starting.flags]: ../../usage/administration/starting.md#flags
 [docs.starting]: ../../usage/administration/starting.md

scripts/release-docker.sh

@@ -10,12 +10,15 @@ set -eu
 
 echo "Releasing timberio/vector* Docker images"
 docker build -t timberio/vector:$VERSION distribution/docker
+docker build -t timberio/vector-alpine:$VERSION distribution/docker/alpine
 docker build -t timberio/vector-slim:$VERSION distribution/docker/slim
 docker build -t timberio/vector:latest distribution/docker
 docker build -t timberio/vector-slim:latest distribution/docker/slim
 
 docker login -u "$DOCKER_USERNAME" -p "$DOCKER_PASSWORD"
 docker push timberio/vector:$VERSION
+docker push timberio/vector-alpine:$VERSION
 docker push timberio/vector-slim:$VERSION
 docker push timberio/vector:latest
+docker push timberio/vector-alpine:latest
 docker push timberio/vector-slim:latest

scripts/release-s3.sh

@@ -34,6 +34,7 @@ aws s3 cp "target/artifacts/" "s3://packages.timber.io/vector/$VERSION/" --recur
 # Update the "edge" files
 echo "Uploading all artifacts to s3://packages.timber.io/vector/edge/"
 td=$(mktemp -d)
+
 cp -a "target/artifacts/." "$td"
 rename -v "s/$escaped_version/edge/" $td/*
 echo "Renamed all builds: via \"s/$escaped_version/edge/\""

scripts/signoff.sh

@@ -7,6 +7,16 @@
 #   Signs all previous commits with a DCO signoff as described in the
 #   CONTRIBUTING.md document.
 
+_current_branch=$(git branch | sed -n -e 's/^\* \(.*\)/\1/p')
+hash1=$(git show-ref --heads -s master)
+hash2=$(git merge-base master $_current_branch)
+
+if [ "${hash1}" != "${hash2}" ]; then
+  echo "You branch is not rebased with master. Please rebase first:"
+  echo ""
+  echo "    git rebase master"
+  exit 1
+fi
 
 echo "We found the following commits since master:"
 echo ""
@@ -29,7 +39,6 @@ echo ""
 
 _signoff="sign: $(git config --get user.name) <$(git config --get user.email)>"
 _commit_count=$(git rev-list --count --no-merges master..)
-_current_branch=$(git branch | sed -n -e 's/^\* \(.*\)/\1/p')
 
 git config trailer.sign.key "Signed-off-by"
 git filter-branch -f --msg-filter \