尝试拉取 docker 镜像，但无法找到原因
步骤 1：我删除了所有旧的 Docker 镜像。
[pinn@dat src]$ sudo docker images
[sudo] password for pinn:
REPOSITORY TAG IMAGE ID CREATED SIZE
第2步：
[pinn@dat src]$ sudo docker pull dnanexus/parliament2:hgsc
Trying to pull repository docker.io/dnanexus/parliament2 ...
hgsc: Pulling from docker.io/dnanexus/parliament2
99ad4e3ced4d: Pulling fs layer
ec5a723f4e2a: Pulling fs layer
2a175e11567c: Pulling fs layer
8d26426e95e0: Pulling fs layer
46e451596b7c: Waiting
c63048c591c5: Waiting
6dab66ad6a6b: Waiting
073018493d1a: Waiting
d9093f8394cf: Waiting
39e408d30bae: Pulling fs layer
8f3d038bef6f: Waiting
9408994aa68f: Waiting
2ebbf92a58f2: Waiting
216048caddf1: Waiting
512150e718ce: Waiting
579c94bc81a0: Waiting
544e55a379f1: Waiting
76e4dd1249e2: Waiting
b09afdc7bfbc: Pulling fs layer
6dcc5772958e: Waiting
c60523b7d808: Waiting
512150e718ce: Downloading [==================================================>] 602 MB/602 MB
0a8d29044929: Downloading [==================================================>] 507 MB/507 MB
7b5bc22a6b0f: Downloading [==================================================>] 14.99 MB/14.99 MB
08000760e6cd: Download complete
c032a1aa4aca: Download complete
fe7145687289: Download complete
22233c8f0e35: Download complete
7c2915c43556: Download complete
80c5a9e21000: Downloading [==================================================>] 491.3 MB/491.3 MB
b51941c9c78e: Downloading [==================================================>] 491.3 MB/491.3 MB
d4be8cb6829d: Download complete
4a01224d389b: Download complete
9109511ef564: Download complete
b18603b9bf45: Download complete
22e1f71498ed: Download complete
024be5d16e13: Download complete
040573916ee9: Download complete
c803bf724b83: Download complete
823cb891a20c: Download complete
7d0b35ba0798: Download complete
c7f65657d722: Download complete
95d76f17846a: Download complete
42e613c0c2f1: Download complete
**write /var/lib/docker/tmp/GetImageBlob997861703: no space left on device**
结果df -h
[pinn@dat src]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 197G 78G 110G 42% /
devtmpfs 504G 0 504G 0% /dev
tmpfs 504G 52K 504G 1% /dev/shm
tmpfs 504G 494M 504G 1% /run
tmpfs 504G 0 504G 0% /sys/fs/cgroup
/dev/sda2 2.0G 324M 1.7G 16% /boot
/dev/mapper/centos-home 765G 506G 220G 70% /home
/dev/mapper/centos-var 9.8G 9.2G 39M 100% /var
/dev/sdb 82T 73T 5.3T 94% /data
tmpfs 101G 52K 101G 1% /run/user/0
tmpfs 101G 0 101G 0% /run/user/1009
tmpfs 101G 0 101G 0% /run/user/1004
tmpfs 101G 0 101G 0% /run/user/1002
tmpfs 101G 0 101G 0% /run/user/1006
tmpfs 101G 0 101G 0% /run/user/1013
答案1
默认情况下，Docker 的运行数据已保存/var。这包括所有容器和镜像、网络、临时构建层以及正在转换的对象（例如，导出或导入时）。
根据您的df -h输出：
/dev/mapper/centos-var 9.8G 9.2G 39M 100% /var
由于那是一个映射分区（可能是 LVM？），您应该能够更改其大小以更适合您的需要。