chore: Rename ELK_VERSION to ELASTIC_VERSION

More appropriate name considering that extensions, which aren't part of
the "ELK" stack, also rely on this variable.

.env

@@ -1,4 +1,4 @@
-ELK_VERSION=8.0.0
+ELASTIC_VERSION=8.0.0
 
 ## Passwords for stack users
 #

.github/workflows/update.yml

@@ -65,7 +65,7 @@ jobs:
         if: steps.get-latest-release.outputs.result
         run: |
           source .env
-          cur_ver="$ELK_VERSION"
+          cur_ver="$ELASTIC_VERSION"
           new_ver=${{ fromJson(steps.get-latest-release.outputs.result).version }}
 
           # Escape dot characters so sed interprets them as literal dots

docker-compose.yml

@@ -13,7 +13,7 @@ services:
     build:
       context: setup/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     volumes:
       - setup:/state:Z
     environment:
@@ -27,7 +27,7 @@ services:
     build:
       context: elasticsearch/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     volumes:
       - ./elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro,z
       - elasticsearch:/usr/share/elasticsearch/data:z
@@ -50,7 +50,7 @@ services:
     build:
       context: logstash/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     volumes:
       - ./logstash/config/logstash.yml:/usr/share/logstash/config/logstash.yml:ro,Z
       - ./logstash/pipeline:/usr/share/logstash/pipeline:ro,Z
@@ -71,7 +71,7 @@ services:
     build:
       context: kibana/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     volumes:
       - ./kibana/config/kibana.yml:/usr/share/kibana/config/kibana.yml:ro,Z
     ports:

elasticsearch/Dockerfile

@@ -1,7 +1,7 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
 # https://www.docker.elastic.co/
-FROM docker.elastic.co/elasticsearch/elasticsearch:${ELK_VERSION}
+FROM docker.elastic.co/elasticsearch/elasticsearch:${ELASTIC_VERSION}
 
 # Add your elasticsearch plugins setup here
 # Example: RUN elasticsearch-plugin install analysis-icu

extensions/apm-server/Dockerfile

@@ -1,3 +1,3 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
-FROM docker.elastic.co/apm/apm-server:${ELK_VERSION}
+FROM docker.elastic.co/apm/apm-server:${ELASTIC_VERSION}

extensions/apm-server/apm-server-compose.yml

@@ -5,7 +5,7 @@ services:
     build:
       context: extensions/apm-server/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     command:
         # Disable strict permission checking on 'apm-server.yml' configuration file
         # https://www.elastic.co/guide/en/beats/libbeat/current/config-file-permissions.html

extensions/enterprise-search/Dockerfile

@@ -1,4 +1,4 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
 # https://www.docker.elastic.co/
-FROM docker.elastic.co/enterprise-search/enterprise-search:${ELK_VERSION}
+FROM docker.elastic.co/enterprise-search/enterprise-search:${ELASTIC_VERSION}

extensions/enterprise-search/enterprise-search-compose.yml

@@ -5,7 +5,7 @@ services:
     build:
       context: extensions/enterprise-search/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     volumes:
       - ./extensions/enterprise-search/config/enterprise-search.yml:/usr/share/enterprise-search/config/enterprise-search.yml:ro,Z
     environment:

extensions/filebeat/Dockerfile

@@ -1,3 +1,3 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
-FROM docker.elastic.co/beats/filebeat:${ELK_VERSION}
+FROM docker.elastic.co/beats/filebeat:${ELASTIC_VERSION}

extensions/filebeat/filebeat-compose.yml

@@ -5,7 +5,7 @@ services:
     build:
       context: extensions/filebeat/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     # Run as 'root' instead of 'filebeat' (uid 1000) to allow reading
     # 'docker.sock' and the host's filesystem.
     user: root

extensions/metricbeat/Dockerfile

@@ -1,3 +1,3 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
-FROM docker.elastic.co/beats/metricbeat:${ELK_VERSION}
+FROM docker.elastic.co/beats/metricbeat:${ELASTIC_VERSION}

extensions/metricbeat/metricbeat-compose.yml

@@ -5,7 +5,7 @@ services:
     build:
       context: extensions/metricbeat/
       args:
-        ELK_VERSION: ${ELK_VERSION}
+        ELASTIC_VERSION: ${ELASTIC_VERSION}
     # Run as 'root' instead of 'metricbeat' (uid 1000) to allow reading
     # 'docker.sock' and the host's filesystem.
     user: root

kibana/Dockerfile

@@ -1,7 +1,7 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
 # https://www.docker.elastic.co/
-FROM docker.elastic.co/kibana/kibana:${ELK_VERSION}
+FROM docker.elastic.co/kibana/kibana:${ELASTIC_VERSION}
 
 # Add your kibana plugins setup here
 # Example: RUN kibana-plugin install <name|url>

logstash/Dockerfile

@@ -1,7 +1,7 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
 # https://www.docker.elastic.co/
-FROM docker.elastic.co/logstash/logstash:${ELK_VERSION}
+FROM docker.elastic.co/logstash/logstash:${ELASTIC_VERSION}
 
 # Add your logstash plugins setup here
 # Example: RUN logstash-plugin install logstash-filter-json

setup/Dockerfile

@@ -1,7 +1,7 @@
-ARG ELK_VERSION
+ARG ELASTIC_VERSION
 
 # https://www.docker.elastic.co/
-FROM docker.elastic.co/elasticsearch/elasticsearch:${ELK_VERSION}
+FROM docker.elastic.co/elasticsearch/elasticsearch:${ELASTIC_VERSION}
 
 USER root
 RUN mkdir /state && chown elasticsearch /state