feature(dockerfile): add basic healthcheck

- check mysqld service only, not actual database

.dockerignore

@@ -1,3 +0,0 @@
-/**
-!Dockerfile
-!entrypoint.sh

.gitattributes

@@ -20,7 +20,7 @@
 *.PDF      diff=astextplain
 *.rtf      diff=astextplain
 *.RTF      diff=astextplain
-*.md       text
+*.md       text diff=markdown
 *.tex      text diff=tex
 *.adoc     text
 *.textile  text
@@ -30,6 +30,7 @@
 *.tsv      text
 *.txt      text
 *.sql      text
+*.ps1      text eol=crlf
 
 # Graphics
 *.png      binary
@@ -53,7 +54,23 @@
 # These are explicitly windows files and should use crlf
 *.bat      text eol=crlf
 *.cmd      text eol=crlf
-*.ps1      text eol=crlf
+
+# web frontend stack -- force LF so SRI hashes are always correct
+*.html     text eol=lf
+*.htm      text eol=lf
+*.css      text eol=lf
+*.min.css  text eol=lf
+*.js       text eol=lf
+*.min.js   text eol=lf
+*.php      text eol=lf
+
+# Visual Studio projects (Rider also)
+*.cs     diff=csharp
+*.sln    merge=union
+*.csproj merge=union
+*.vbproj merge=union
+*.fsproj merge=union
+*.dbproj merge=union
 
 # Serialisation
 *.json     text
@@ -76,7 +93,8 @@
 # Exclude files from exporting
 #
 
-.gitattributes export-ignore
+.gitattributes  export-ignore
-.gitignore     export-ignore
+.gitignore      export-ignore
-.gitkeep       export-ignore
+.gitkeep        export-ignore
-.vscode        export-ignore
+.idea           export-ignore
+.vscode         export-ignore

.gitignore

@@ -1,11 +1,73 @@
-# VSCode files
+### JetBrains template
-.vscode/*
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
-!.vscode/settings.json
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
-!.vscode/tasks.json
+
-!.vscode/launch.json
+# User-specific stuff
-!.vscode/extensions.json
+.idea/**/workspace.xml
-!.vscode/numbered-bookmarks.json
+.idea/**/tasks.xml
-*.code-workspace
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
 
-# Local History for Visual Studio Code
-.history/

.idea/.idea.ab-mariadb-alpine.dir/.idea/git_toolbox_prj.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GitToolBoxProjectSettings">
-    <option name="commitMessageIssueKeyValidationOverride">
-      <BoolValueOverride>
-        <option name="enabled" value="true" />
-      </BoolValueOverride>
-    </option>
-    <option name="commitMessageValidationConfigOverride">
-      <CommitMessageValidationOverride>
-        <option name="enabled" value="true" />
-      </CommitMessageValidationOverride>
-    </option>
-  </component>
-</project>

.idea/.idea.ab-mariadb-alpine.dir/.idea/markdown.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="MarkdownSettings">
-    <enabledExtensions>
-      <entry key="MermaidLanguageExtension" value="false" />
-      <entry key="PlantUMLLanguageExtension" value="false" />
-    </enabledExtensions>
-  </component>
-</project>

.idea/.idea.ab-mariadb-alpine.dir/.idea/riderModule.iml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="RIDER_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$/../.." />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

.run/Dockerfile.run.xml

@@ -1,28 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Dockerfile" type="docker-deploy" factoryName="dockerfile" server-name="Docker LOCAL">
-    <deployment type="dockerfile">
-      <settings>
-        <option name="imageTag" value="docker.asifbacchus.dev/mariadb/ab-mariadb-alpine:10.5.13" />
-        <option name="buildArgs">
-          <list>
-            <DockerEnvVarImpl>
-              <option name="name" value="INTERNAL_VERSION" />
-              <option name="value" value="1.2" />
-            </DockerEnvVarImpl>
-            <DockerEnvVarImpl>
-              <option name="name" value="GIT_COMMIT" />
-              <option name="value" value="af07af2015" />
-            </DockerEnvVarImpl>
-            <DockerEnvVarImpl>
-              <option name="name" value="BUILD_DATE" />
-              <option name="value" value="2022-02-19" />
-            </DockerEnvVarImpl>
-          </list>
-        </option>
-        <option name="buildOnly" value="true" />
-        <option name="sourceFilePath" value="Dockerfile" />
-      </settings>
-    </deployment>
-    <method v="2" />
-  </configuration>
-</component>

Dockerfile

@@ -1,20 +1,14 @@
 #
-# mariadb running on Alpine Linux
+### mariadb running on Alpine Linux
 #
 
-# version arguments
+FROM alpine:3.14
-ARG ALPINE_VERSION="3.14"
-ARG MARIADB_VERSION="10.5.13-r0"
-
-FROM alpine:${ALPINE_VERSION}
-ARG ALPINE_VERSION
-ARG MARIADB_VERSION
 
 # standardized labels
 MAINTAINER Asif Bacchus <asif@asifbacchus.dev>
 LABEL dev.asifbacchus.docker.internalName="ab-mariadb-alpine"
 LABEL org.opencontainer.image.authors="Asif Bacchus <asif@asifbacchus.dev>"
-LABEL org.opencontainer.image.description="Mariadb on Alpine Linux."
+LABEL org.opencontainer.image.description=""
 LABEL org.opencontainer.image.documentation="https://git.asifbacchus.dev/ab-docker/ab-mariadb-alpine/raw/branch/main/README.md"
 LABEL org.opencontainer.image.source="https://git.asifbacchus.dev/ab-docker/ab-mariadb-alpine.git"
 LABEL org.opencontainer.image.title="ab-mariadb-alpine"
@@ -22,12 +16,12 @@ LABEL org.opencontainer.image.url="https://git.asifbacchus.dev/ab-docker/ab-mari
 LABEL org.opencontainer.image.vendor="Asif Bacchus <asif@asifbacchus.dev>"
 
 # install mariadb and turn on TCP connection in default config
-RUN apk --no-cache --update add \
+RUN apk --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main add \
     tzdata \
-    mariadb>${MARIADB_VERSION} \
+    mariadb \
-    mariadb-client>${MARIADB_VERSION} \
+    mariadb-client \
-    mariadb-server-utils>${MARIADB_VERSION} \
+    mariadb-server-utils \
-    && apk --no-cache --update upgrade \
+    && rm -f /var/cache/apk/* \
     && sed -i 's/skip-networking/skip-networking=0/' /etc/my.cnf.d/mariadb-server.cnf
 
 # expose ports
@@ -36,6 +30,14 @@ EXPOSE 3306
 # create volume if user forgets
 VOLUME ["/var/lib/mysql"]
 
+# basic healthcheck (service only)
+HEALTHCHECK \
+    --interval=30s \
+    --timeout=10s \
+    --start-period=30s \
+    --retries=3 \
+    CMD mysqladmin ping --silent
+
 # set environment variables
 ENV TZ=Etc/UTC
 ENV MYSQL_UID=8100
@@ -58,7 +60,9 @@ RUN mkdir -p /docker-entrypoint-preinit.d \
 ENTRYPOINT [ "/usr/local/bin/entrypoint.sh" ]
 CMD [ "/usr/bin/mysqld", "--user=mysql", "--console" ]
 
+# add parameters, version and build date labels
 # set build timestamp and version labels
+ARG MARIADB_VERSION
 ARG INTERNAL_VERSION
 ARG GIT_COMMIT
 ARG BUILD_DATE