PS-8638 Changes for mysqlrouter to work as a part of PS distribution

mysql-router/Dockerfile

@@ -55,7 +55,10 @@ COPY dockerdir /
 
 RUN set -ex; \
     mkdir -p /tmp/mysqlrouter/run /var/lib/mysqlrouter ; \
-    chown -R 1001:1001 /tmp/mysqlrouter/run /var/lib/mysqlrouter
+    chown -R 1001:1001 /tmp/mysqlrouter/run /var/lib/mysqlrouter ; \
+    chmod -R 777 /var/log/mysqlrouter ; \
+    chmod -R 777 /tmp/mysqlrouter ; \
+    chmod -R 777 /etc/mysqlrouter
 
 VOLUME ["/var/lib/mysqlrouter"]
 

mysql-router/dockerdir/entrypoint.sh

@@ -20,4 +20,41 @@ if [ -n "$KUBERNETES_SERVICE_HOST" ]; then
 	sed -i "/\[logger\]/a destination=/dev/stdout" ${ROUTER_DIR}/mysqlrouter.conf
 fi
 
+if [ "$1" = 'mysqlrouter' ]; then
+    if [[ -z $MYSQL_HOST || -z $MYSQL_PORT || -z $MYSQL_USER || -z $MYSQL_PASSWORD ]]; then
+            echo "We require all of"
+            echo "    MYSQL_HOST"
+            echo "    MYSQL_PORT"
+            echo "    MYSQL_USER"
+            echo "    MYSQL_PASSWORD"
+            echo "to be set. Exiting."
+            exit 1
+    fi
+
+    PASSFILE=$(mktemp)
+    echo "$MYSQL_PASSWORD" > "$PASSFILE"
+    DEFAULTS_EXTRA_FILE=$(mktemp)
+    cat >"$DEFAULTS_EXTRA_FILE" <<EOF
+[client]
+password="$MYSQL_PASSWORD"
+EOF
+    max_tries=12
+    attempt_num=0
+    until (echo > "/dev/tcp/$MYSQL_HOST/$MYSQL_PORT") >/dev/null 2>&1; do
+      echo "Waiting for mysql server $MYSQL_HOST ($attempt_num/$max_tries)"
+      sleep $(( attempt_num++ ))
+      if (( attempt_num == max_tries )); then
+        exit 1
+      fi
+    done
+    echo "Succesfully contacted mysql server at $MYSQL_HOST. Checking for cluster state."
+    mysqlrouter --bootstrap "$MYSQL_USER@$MYSQL_HOST:$MYSQL_PORT"  --directory /tmp/mysqlrouter --force < "$PASSFILE"
+    sed -i -e 's/logging_folder=.*$/logging_folder=/' /tmp/mysqlrouter/mysqlrouter.conf
+    echo "Starting mysql-router."
+    exec "$@" --config /tmp/mysqlrouter/mysqlrouter.conf
+fi
+
+rm -f "$PASSFILE"
+rm -f "$DEFAULTS_EXTRA_FILE"
+unset DEFAULTS_EXTRA_FILE
 exec "$@"