Docker 이미지를 가져올 때 공간이 부족하다는 메시지가 나타나면 어떻게 해야 하나요?

[root@node2 k8s]# docker info | grep -i "docker root dir"
  WARNING: You're not using the default seccomp profile
Docker Root Dir: /var/lib/docker

[root@node2 ~]# df -hl /var/lib/docker
文件系统                容量  已用  可用 已用% 挂载点
/dev/mapper/centos-var  2.0G  1.0G  1.0G   50% /var

mkdir -p /etc/systemd/system/docker.service.d/

cat /etc/systemd/system/docker.service.d/devicemapper.conf
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd  --graph=/docker-root

systemctl daemon-reload
systemctl restart docker
systemctl enable docker