Removes UBI7 docker code

Removal of code (#11335) to generate UBI7 based docker images, as this is not
being used for now

Fixes #11489

docker/Makefile

@@ -12,7 +12,7 @@ else
   VERSION_TAG := $(ELASTIC_VERSION)
 endif
 
-IMAGE_FLAVORS ?= oss full ubi7
+IMAGE_FLAVORS ?= oss full
 DEFAULT_IMAGE_FLAVOR ?= full
 
 IMAGE_TAG := $(ELASTIC_REGISTRY)/logstash/logstash
@@ -20,7 +20,7 @@ HTTPD ?= logstash-docker-artifact-server
 
 FIGLET := pyfiglet -w 160 -f puffy
 
-all: build-from-local-artifacts build-from-local-oss-artifacts build-from-local-ubi7-artifacts public-dockerfiles
+all: build-from-local-artifacts build-from-local-oss-artifacts public-dockerfiles
 
 lint: venv
 	flake8 tests
@@ -48,16 +48,6 @@ build-from-local-oss-artifacts: venv dockerfile env2yaml
 	  (docker kill $(HTTPD); false);
 	-docker kill $(HTTPD)
 
-build-from-local-ubi7-artifacts: venv dockerfile env2yaml
-	docker run --rm -d --name=$(HTTPD) \
-	           -p 8000:8000 --expose=8000 -v $(ARTIFACTS_DIR):/mnt \
-	           python:3 bash -c 'cd /mnt && python3 -m http.server'
-	timeout 120 bash -c 'until curl -s localhost:8000 > /dev/null; do sleep 1; done'
-	pyfiglet -f puffy -w 160 "Building: ubi7"; \
-	docker build --network=host -t $(IMAGE_TAG)-ubi7:$(VERSION_TAG) -f $(ARTIFACTS_DIR)/Dockerfile-ubi7 data/logstash || \
-	  (docker kill $(HTTPD); false);
-	-docker kill $(HTTPD)
-
 COPY_FILES = $(ARTIFACTS_DIR)/docker/config/pipelines.yml $(ARTIFACTS_DIR)/docker/config/logstash-oss.yml $(ARTIFACTS_DIR)/docker/config/logstash-full.yml $(ARTIFACTS_DIR)/docker/config/log4j2.properties $(ARTIFACTS_DIR)/docker/pipeline/default.conf $(ARTIFACTS_DIR)/docker/bin/docker-entrypoint $(ARTIFACTS_DIR)/docker/env2yaml/env2yaml
 
 $(ARTIFACTS_DIR)/docker/config/pipelines.yml: data/logstash/config/pipelines.yml
@@ -93,18 +83,9 @@ public-dockerfiles: venv templates/Dockerfile.j2 docker_paths $(COPY_FILES)
 	  -D local_artifacts='false' \
 	  -D release='$(RELEASE)' \
 	  templates/Dockerfile.j2 > $(ARTIFACTS_DIR)/Dockerfile-oss && \
-	jinja2 \
-	  -D elastic_version='$(ELASTIC_VERSION)' \
-	  -D version_tag='$(VERSION_TAG)' \
-	  -D image_flavor='ubi7' \
-	  -D local_artifacts='false' \
-	  -D release='$(RELEASE)' \
-	  templates/Dockerfile.j2 > $(ARTIFACTS_DIR)/Dockerfile-ubi7 && \
 	cd $(ARTIFACTS_DIR)/docker && \
 	cp $(ARTIFACTS_DIR)/Dockerfile-full Dockerfile && \
 	tar -zcf ../logstash-$(VERSION_TAG)-docker-build-context.tar.gz Dockerfile bin config env2yaml pipeline && \
-	cp $(ARTIFACTS_DIR)/Dockerfile-ubi7 Dockerfile && \
-	tar -zcf ../logstash-ubi7-$(VERSION_TAG)-docker-build-context.tar.gz Dockerfile bin config env2yaml pipeline && \
 	cp $(ARTIFACTS_DIR)/Dockerfile-oss Dockerfile && \
 	tar -zcf ../logstash-oss-$(VERSION_TAG)-docker-build-context.tar.gz Dockerfile bin config env2yaml pipeline
 

docker/templates/Dockerfile.j2

@@ -11,21 +11,13 @@
   {% set tarball = 'logstash-%s.tar.gz' % elastic_version -%}
 {% endif -%}
 
-{% if image_flavor == 'ubi7' -%}
-  {% set base_image = 'registry.access.redhat.com/ubi7/ubi-minimal:7.7' -%}
-  {% set package_manager = 'microdnf'  -%}
-{% else -%}
-  {% set base_image = 'centos:7'  -%}
-  {% set package_manager = 'yum' -%}
-{% endif -%}
 
-
-FROM {{ base_image }}
+FROM centos:7
 
 # Install Java and the "which" command, which is needed by Logstash's shell
 # scripts.
-RUN {{ package_manager }} update -y && {{ package_manager }} install -y java-11-openjdk-devel which && \
-    {{ package_manager }} clean all
+RUN yum update -y && yum install -y java-11-openjdk-devel which && \
+    yum clean all
 
 # Provide a non-root user to run the process.
 RUN groupadd --gid 1000 logstash && \
@@ -51,11 +43,7 @@ ENV PATH=/usr/share/logstash/bin:$PATH
 # Provide a minimal configuration, so that simple invocations will provide
 # a good experience.
 ADD config/pipelines.yml config/pipelines.yml
-{% if image_flavor == 'oss' -%}
-ADD config/logstash-oss.yml config/logstash.yml
-{% else -%}
-ADD config/logstash-full.yml config/logstash.yml
-{% endif -%}
+ADD config/logstash-{{ image_flavor }}.yml config/logstash.yml
 ADD config/log4j2.properties config/
 ADD pipeline/default.conf pipeline/logstash.conf
 RUN chown --recursive logstash:root config/ pipeline/

rakelib/artifacts.rake

@@ -181,22 +181,16 @@ namespace "artifact" do
   desc "Build docker image"
   task "docker" => ["prepare", "generate_build_metadata", "tar"] do
     puts("[docker] Building docker image")
-    build_docker
+    build_docker(false)
   end
 
   desc "Build OSS docker image"
   task "docker_oss" => ["prepare", "generate_build_metadata", "tar_oss"] do
     puts("[docker_oss] Building OSS docker image")
-    build_docker('oss')
+    build_docker(true)
   end
 
-  desc "Build UBI7 docker image"
-  task "docker_ubi7" => ["prepare", "generate_build_metadata", "tar"] do
-    puts("[docker_ubi7] Building UBI docker image")
-    build_docker('ubi7')
-  end
-
-  desc "Generate Dockerfile for default, ubi7 and oss images"
+  desc "Generate Dockerfile for default and oss images"
   task "dockerfiles" => ["prepare", "generate_build_metadata"] do
     puts("[dockerfiles] Building Dockerfiles")
     build_dockerfiles
@@ -216,7 +210,6 @@ namespace "artifact" do
     unless ENV['SKIP_DOCKER'] == "1"
       Rake::Task["artifact:docker"].invoke
       Rake::Task["artifact:docker_oss"].invoke
-      Rake::Task["artifact:docker_ubi7"].invoke
       Rake::Task["artifact:dockerfiles"].invoke
     end
   end
@@ -545,15 +538,18 @@ namespace "artifact" do
     end
   end # def package
 
-  def build_docker(image = nil)
+  def build_docker(oss = false)
     env = {
       "ARTIFACTS_DIR" => ::File.join(Dir.pwd, "build"),
       "RELEASE" => ENV["RELEASE"],
       "VERSION_QUALIFIER" => VERSION_QUALIFIER
     }
     Dir.chdir("docker") do |dir|
-      make_job = image.nil? ?  "make build-from-local-artifacts"  : "make build-from-local-#{image}-artifacts"
-      system(env, make_job)
+      if oss
+        system(env, "make build-from-local-oss-artifacts")
+      else
+        system(env, "make build-from-local-artifacts")
+      end
     end
   end