Add docker-mysql

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/mysql/default.nix

@@ -0,0 +1,41 @@
+{ pkgs, ... }:
+let
+  entrypoint = pkgs.writeTextFile {
+    name = "entrypoint";
+    executable = true;
+    destination = "/bin/entrypoint";
+    text = builtins.readFile ./entrypoint.sh;
+  };
+in
+pkgs.dockerTools.buildImage {
+  name = "mysql";
+  fromImage = import ../base { inherit pkgs; };
+
+  copyToRoot = pkgs.buildEnv {
+    name = "root";
+    paths = with pkgs; [
+      entrypoint
+      mysql84
+    ];
+    pathsToLink = [
+      "/bin"
+      "/lib"
+      "/share"
+    ];
+  };
+
+  runAsRoot = ''
+    mkdir -p /run/mysqld
+  '';
+
+  config = {
+    Entrypoint = [ "entrypoint" ];
+    ExposedPorts = {
+      "3306/tcp" = { };
+    };
+    WorkingDir = "/var/lib/mysql";
+    Volumes = {
+      "/var/lib/mysql" = { };
+    };
+  };
+}

packages/docker/mysql/entrypoint.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+MYSQL_USER="${MYSQL_USER:-mysql}"
+MYSQL_PASSWORD="${MYSQL_PASSWORD:-mysql}"
+MYSQL_ROOT_PASSWORD="${MYSQL_ROOT_PASSWORD:-$MYSQL_PASSWORD}"
+MYSQL_DB="${MYSQL_DB}"
+DATADIR="${DATADIR:-/var/lib/mysql}"
+
+if [ ! -f "$DATADIR/mysql_upgrade_history" ]; then
+  mysqld --initialize-insecure --datadir="$DATADIR"
+
+  mysqld --user=root --datadir="$DATADIR" --skip-networking --skip-grant-tables &
+  PID="$!"
+
+  while ! mysql --protocol=socket -e "
+    FLUSH PRIVILEGES;
+
+    ALTER USER 'root'@'localhost' IDENTIFIED BY '$MYSQL_ROOT_PASSWORD';
+
+    CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD';
+    GRANT ALL PRIVILEGES ON *.* TO '$MYSQL_USER'@'%' WITH GRANT OPTION;
+
+    CREATE DATABASE \`$MYSQL_DB\`;
+  "; do
+    sleep 0.1
+  done
+
+  kill -QUIT "$PID"
+  wait "$PID" || true
+fi
+
+trap 'kill -QUIT "$PID"' INT TERM
+mysqld --user=root --datadir="$DATADIR" "$@" &
+PID=$!
+wait "$PID"
+exit $?