Initial commit

.gitlab-ci.yml

+image: docker:19
+
+services:
+  - docker:dind
+
+variables:
+  DOCKER_DRIVER: overlay2
+  DOCKER_TLS_CERTDIR: ""
+
+before_script:
+  - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin $CI_REGISTRY
+
+stages:
+  - build
+  - publish
+
+# push to container repo
+push:
+  stage: build
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:latest || true
+    - docker build --pull -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA .
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
+
+# push latest on branch master
+push-latest:
+  stage: publish
+  variables:
+    # we don't need git
+    GIT_STRATEGY: none
+  script:
+    # reuse previously pushed image
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
+    - docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA $CI_REGISTRY_IMAGE:latest
+    - docker push $CI_REGISTRY_IMAGE:latest
+  only:
+    - master
+
+# push tagged images
+push-tag:
+  stage: publish
+  variables:
+    GIT_STRATEGY: none
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
+    - docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  only:
+    - tags

Dockerfile

+ARG elasticsearch_version
+FROM docker.elastic.co/elasticsearch/elasticsearch:${elasticsearch_version}
+
+RUN bin/elasticsearch-plugin install --batch repository-s3

Readme.md

+# Elasticsearch
+This is a custom elasticsearch image with the elastic image as a base and the s3 repository plugin for snapshots. This image follows the best practice of [elastic.co](https://github.com/elastic/helm-charts/blob/master/elasticsearch/README.md#how-to-install-plugins).
+
+## Build
+```bash
+docker build --build-arg elasticsearch_version=7
+```