Drone 0.8.4 - stucks as pending

I am using drone 0.8.4 with mysql database and github. But my builds stucks in pending state.
So, here my drone’s docker-compose.yml and .drone.yml

version: '3'
services:
  mysql:
    image: mysql:5.7
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=123123123
      - MYSQL_DATABASE=drone
      - MYSQL_USER=drone
      - MYSQL_PASSWORD=234234234
    ports:
      - 3306:3306
    volumes:
      - /home/user/mysql:/var/lib/mysql
    networks:
      - drone
  drone-server:
    image: drone/drone:0.8.4
    depends_on:
      - mysql
    ports:
      - 8000:8000
      - 9000:9000
    volumes:
      - /var/lib/drone:/var/lib/drone
    restart: always
    env_file:
      - /etc/drone/server.env
    networks:
      - drone
drone-agent:
    image: drone/drone:0.8.4
    command: agent
    depends_on:
      - drone-server
      - mysql
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: always
    env_file:
      - /etc/drone/agent.env
    networks:
      - drone
networks:
  drone:

server.env

# Service settings
DRONE_SECRET=secret
DRONE_HOST=http://127.0.0.1:8000
# Registration settings
DRONE_OPEN=false
DRONE_ADMIN=user
# GitHub Settings
DRONE_GITHUB=true
DRONE_GITHUB_CLIENT=client
DRONE_GITHUB_SECRET=secret
# Database
DRONE_DATABASE_DRIVER=mysql
DRONE_DATABASE_DATASOURCE=drone:[email protected](mysql:3306)/drone?parseTime=true
DRONE_DEBUG=true
DRONE_DEBUG_PRETTY=true

agent.env

DRONE_SECRET=secret
DRONE_HOST=http://drone-server:8000
DRONE_SERVER=drone-server:9000
# GitHub Settings
DRONE_GITHUB=true
DRONE_GITHUB_CLIENT=client
DRONE_GITHUB_SECRET=secret
# Database
DRONE_DATABASE_DRIVER=mysql
DRONE_DATABASE_DATASOURCE=drone:[email protected](mysql:3306)/drone?parseTime=true
DRONE_DEBUG=true
DRONE_DEBUG_PRETTY=true

drone.yml

clone:
  git:
    image: plugins/git
    depth: 50
    tags: true
pipeline:
  unit:
    image: laradock/workspace:2.0-71
    group: backend
    commands:
      - php -v
      - composer -V
      - cp .env.ci .env
      - composer install --prefer-dist
      - ./vendor/bin/codecept run unit
services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:1.3.5
  memcached:
    image: memcached:1.5
  gearman:
    image: moltar/gearmand:latest
  mysql:
    image: mysql:5.7
    environment:
      - MYSQL_ROOT_PASSWORD=secret
      - MYSQL_DATABASE=database
      - MYSQL_USER=user
      - MYSQL_PASSWORD=secret

No errors in logs event with debug enabled. Build just stucks http://joxi.ru/4Akp7N9hypVDRr. And i can not remove them or cancel. Any ideas why it happens?

Ok, problem is that for agent there is a separate image - drone/agent.
Thanks for help.