Linux中创建目录时报错“mkdir: cannot create directory ‘gitlab-stu’: No space left on device”，磁盘空间不足。

使用df命令查看，发现 / 下面use%占满了：

 查看inode使用情况：

清理未使用的镜像： 

可以看到docker的数据大部分存放在/var/lib/docker下，生成了大量的数据和日志，可以清理掉未使用的容器：
 

[root@k8s-master overlay2]# docker ps -a
CONTAINER ID   IMAGE                                                            COMMAND                  CREATED              STATUS                          PORTS     NAMES
050981b257d8   08616d26b8e7                                                     "start_runit"            18 seconds ago       Up 17 seconds                             k8s_calico-node_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_11
68cf37fa7c50   d4893b67e97f                                                     "kube-scheduler --au…"   About a minute ago   Up About a minute                         k8s_kube-scheduler_kube-scheduler-k8s-master_kube-system_56e5f657c0f5842192c9009d22729ac6_22
871ea98c249e   fce326961ae2                                                     "etcd --advertise-cl…"   About a minute ago   Exited (1) About a minute ago             k8s_etcd_etcd-k8s-master_kube-system_8a70357dc3020758ccd4fa01d7b841e7_10
3fe287a975f1   2b5e9c96248f                                                     "kube-apiserver --ad…"   About a minute ago   Exited (1) About a minute ago             k8s_kube-apiserver_kube-apiserver-k8s-master_kube-system_bd2fc8f7feadf4ab1e8a6bdf57206b9e_12
71a8e2a2bc5f   5e785d005ccc                                                     "/usr/bin/kube-contr…"   About a minute ago   Exited (1) 21 seconds ago                 k8s_calico-kube-controllers_calico-kube-controllers-697d846cf4-qfkv6_kube-system_125c8aa2-890d-4d94-babb-060497bfbf21_10
5fc1e1310404   08616d26b8e7                                                     "start_runit"            About a minute ago   Exited (137) 18 seconds ago               k8s_calico-node_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_10
96ddfb3c5c3e   c7ab721dfdae                                                     "kube-controller-man…"   About a minute ago   Up About a minute                         k8s_kube-controller-manager_kube-controller-manager-k8s-master_kube-system_7319ae284ccecb49c0164089eaf03446_20
b52bab1b74a2   08616d26b8e7                                                     "calico-node -init -…"   2 hours ago          Exited (0) 2 hours ago                    k8s_mount-bpffs_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_0
0e084fb550b6   d70a5947d57e                                                     "/opt/cni/bin/install"   2 hours ago          Exited (0) 2 hours ago                    k8s_install-cni_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_0
afba773490d7   swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/calico/cni    "/opt/cni/bin/calico…"   2 hours ago          Exited (0) 2 hours ago                    k8s_upgrade-ipam_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_0
915d71a80fea   8d147537fb7d                                                     "/coredns -conf /etc…"   2 hours ago          Up 2 hours                                k8s_coredns_coredns-7d89d9b6b8-92d8s_kube-system_7a32890f-7f41-4dcc-b38e-54d1f1c2dfb3_9
100aee7db136   8d147537fb7d                                                     "/coredns -conf /etc…"   2 hours ago          Up 2 hours                                k8s_coredns_coredns-7d89d9b6b8-srqz6_kube-system_eae63baf-04ee-4b88-a69e-072466f5ae17_9
6621ebec7331   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_coredns-7d89d9b6b8-92d8s_kube-system_7a32890f-7f41-4dcc-b38e-54d1f1c2dfb3_9
7981e16863b2   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_coredns-7d89d9b6b8-srqz6_kube-system_eae63baf-04ee-4b88-a69e-072466f5ae17_9
ee6ebd069c77   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_calico-kube-controllers-697d846cf4-qfkv6_kube-system_125c8aa2-890d-4d94-babb-060497bfbf21_9
a3521d6e24de   c7ab721dfdae                                                     "kube-controller-man…"   2 hours ago          Up 2 hours                                k8s_kube-controller-manager_kube-controller-manager-k8s-master_kube-system_7319ae284ccecb49c0164089eaf03446_19
faff6b163cdc   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_kube-apiserver-k8s-master_kube-system_bd2fc8f7feadf4ab1e8a6bdf57206b9e_10
7b4edd0b9b03   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_kube-controller-manager-k8s-master_kube-system_7319ae284ccecb49c0164089eaf03446_10
f3aa9bcbf5bd   77c8bfac1781                                                     "/usr/local/bin/kube…"   2 hours ago          Up 2 hours                                k8s_kube-proxy_kube-proxy-psr4m_kube-system_d352fd1c-b81a-40f1-a870-fe2940ca771b_9
2eb31363f4f8   d4893b67e97f                                                     "kube-scheduler --au…"   2 hours ago          Up 2 hours                                k8s_kube-scheduler_kube-scheduler-k8s-master_kube-system_56e5f657c0f5842192c9009d22729ac6_21
0a7ccb4588c7   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_calico-node-gz8tl_kube-system_ac2e42aa-eac5-41aa-ba3e-43f8555b60c1_9
b0f7ee4117b5   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_kube-scheduler-k8s-master_kube-system_56e5f657c0f5842192c9009d22729ac6_9
00a1cece5698   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_kube-proxy-psr4m_kube-system_d352fd1c-b81a-40f1-a870-fe2940ca771b_9
03401b565985   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Up 2 hours                                k8s_POD_etcd-k8s-master_kube-system_8a70357dc3020758ccd4fa01d7b841e7_9
ca05b972bb38   c7ab721dfdae                                                     "kube-controller-man…"   2 hours ago          Exited (2) 2 hours ago                    k8s_kube-controller-manager_kube-controller-manager-k8s-master_kube-system_7319ae284ccecb49c0164089eaf03446_18
44913e2f7d7e   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 hours ago          Exited (0) 2 hours ago                    k8s_POD_kube-controller-manager-k8s-master_kube-system_7319ae284ccecb49c0164089eaf03446_9
0ed49154f107   d4893b67e97f                                                     "kube-scheduler --au…"   4 hours ago          Exited (0) 2 hours ago                    k8s_kube-scheduler_kube-scheduler-k8s-master_kube-system_56e5f657c0f5842192c9009d22729ac6_20
65d2e6dceb40   8d147537fb7d                                                     "/coredns -conf /etc…"   2 days ago           Exited (0) 2 hours ago                    k8s_coredns_coredns-7d89d9b6b8-92d8s_kube-system_7a32890f-7f41-4dcc-b38e-54d1f1c2dfb3_8
07262e9c7e1a   8d147537fb7d                                                     "/coredns -conf /etc…"   2 days ago           Exited (0) 2 hours ago                    k8s_coredns_coredns-7d89d9b6b8-srqz6_kube-system_eae63baf-04ee-4b88-a69e-072466f5ae17_8
13cbd3171aff   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 days ago           Exited (0) 2 hours ago                    k8s_POD_coredns-7d89d9b6b8-92d8s_kube-system_7a32890f-7f41-4dcc-b38e-54d1f1c2dfb3_8
c229d661f154   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 days ago           Exited (0) 2 hours ago                    k8s_POD_coredns-7d89d9b6b8-srqz6_kube-system_eae63baf-04ee-4b88-a69e-072466f5ae17_8
c5379cc4d269   77c8bfac1781                                                     "/usr/local/bin/kube…"   2 days ago           Exited (2) 2 hours ago                    k8s_kube-proxy_kube-proxy-psr4m_kube-system_d352fd1c-b81a-40f1-a870-fe2940ca771b_8
56b4723f5b57   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 days ago           Exited (0) 2 hours ago                    k8s_POD_kube-proxy-psr4m_kube-system_d352fd1c-b81a-40f1-a870-fe2940ca771b_8
2d40fd60fe8b   registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.5    "/pause"                 2 days ago           Exited (0) 2 hours ago                    k8s_POD_kube-scheduler-k8s-master_kube-system_56e5f657c0f5842192c9009d22729ac6_8
5d5f2b5546d2   5050e13516e9                                                     "docker-entrypoint.s…"   6 days ago           Exited (0) 6 days ago                     agitated_gould
5d3285d40f45   hub.17usoft.com/gsairgroup/tool-portal:1.0.6                     "docker-entrypoint.s…"   8 days ago           Exited (1) 8 days ago                     bold_euler
75286c1d32b5   hub.17usoft.com/gsairgroup/tool-portal:1.0.6                     "docker-entrypoint.s…"   8 days ago           Exited (1) 8 days ago                     suspicious_snyder
34819d1e5f69   hub.17usoft.com/gsairgroup/tool-portal:test-e939b0e              "docker-entrypoint.s…"   8 days ago           Exited (137) 8 days ago                   unruffled_bassi
fa77bbde1466   cf2878b32b89                                                     "docker-entrypoint.s…"   8 days ago           Exited (0) 8 days ago                     determined_shirley
682c367eda49   hub.17usoft.com/gsairgroup/tool-portal:1.0.2                     "docker-entrypoint.s…"   8 days ago           Created                                   unruffled_chebyshev
d43144967e97   hub.17usoft.com/gsairgroup/tool-portal:1.0.2                     "docker-entrypoint.s…"   8 days ago           Exited (130) 8 days ago                   unruffled_payne
ea58d1440961   d8622748a44d                                                     "/bin/sh"                8 days ago           Exited (130) 8 days ago                   silly_easley
11811752dd5f   d8622748a44d                                                     "/bin/sh"                8 days ago           Exited (127) 8 days ago                   cranky_wilbur
6a762a1966ae   c48fc7daaf38                                                     "docker-entrypoint.s…"   8 days ago           Exited (137) 8 days ago                   naughty_ptolemy
c6b1ebecc093   hub.17usoft.com/triggers/travelsky-auto:test-1b88a131            "/sbin/tini -- /app/…"   3 weeks ago          Exited (0) 10 days ago                    hopeful_fermat
10320cbdb9ff   hub.17usoft.com/gsairgroup/travelsky-auto:test-1ee9d797          "/sbin/tini -- /bin/…"   3 weeks ago          Exited (137) 10 days ago                  angry_mendeleev
583801d99427   hub.17usoft.com/triggers/travelsky-auto:test-1b88a131            "/sbin/tini -- /app/…"   4 weeks ago          Exited (0) 4 weeks ago                    goofy_lichterman
5b1519e23361   hub.17usoft.com/gsairgroup/travelsky-auto:test-1ee9d797          "/sbin/tini -- /app/…"   4 weeks ago          Exited (0) 4 weeks ago                    elastic_shannon
54a2883570bd   hub.17usoft.com/gsairgroup/chrome-headless:134-tini-alpine3.16   "/sbin/tini --"          4 weeks ago          Exited (1) 4 weeks ago                    clever_bassi
[root@k8s-master overlay2]# docker rm $(docker ps -a -q)

 清理build cache

查看哪些 Docker 镜像和容器占用了大量空间：

[root@k8s-master DevOps]# docker system df 
TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          11        11        2.001GB   3.526MB (0%)
Containers      27        18        174.5MB   174.5MB (99%)
Local Volumes   25        10        0B        0B
Build Cache     98        0         2.418GB   2.418GB

使用docker builder prune -f 清理缓存

[root@k8s-master DevOps]# docker system df 
TYPE            TOTAL     ACTIVE    SIZE      RECLAIMABLE
Images          11        11        2.001GB   3.526MB (0%)
Containers      27        18        174.5MB   174.5MB (99%)
Local Volumes   25        10        0B        0B
Build Cache     12        0         0B        0B
[root@k8s-master DevOps]# docker builder prune -f
[root@k8s-master DevOps]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 7.3G     0  7.3G   0% /dev
tmpfs                    7.3G   96K  7.3G   1% /dev/shm
tmpfs                    7.3G  248M  7.1G   4% /run
tmpfs                    7.3G     0  7.3G   0% /sys/fs/cgroup
/dev/mapper/centos-root   17G   13G  4.9G  72% /
/dev/sda1               1014M  195M  820M  20% /boot
tmpfs                    1.5G     0  1.5G   0% /run/user/0
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/37f17b90509209b5347801027834b0823c101548378f6e8c736d002e57efe488/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/87bd4a4ef0045f44738c003608c4444336d1dced4c48519b3b3b0124a247527b/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/d3dffc82810c3254b5a5498546d9646935362e8490793af827886c1a67203427/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/dedee12772e7f871c6b9013af797e5ff119c7978b6c6f189d9b2dee0fe52216e/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/93cf028d32d923156599502455f8c48f1bf97ea4b03ac0c819c3303cc07f7a47/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/176679b80087569ed1561488960f189ed25f14ebf94407be3a4d25a414cff083/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/f8d8bff2e92471c1b02bf88e5434c2d4192ea3f004cbe0894fa416bd2d346783/mounts/shm
shm                       64M     0   64M   0% /var/lib/docker/containers/d14519b9f4b8de05a3d9fed0cbcbc442134fa02186479127a991382a5f6da32c/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/b544fef461a40b5267ded815aa9ef6c305befa821c213898c75c3b6d328ae91c/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/863e6b1e0b384e09e8cdefa2e5ccdb600bdaf8379c62d79e583797446e71c266/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/ca820bd41cf0fb861e85c33d1e56dc7c48167be5e9a371b7183e883623fa6930/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/f992b12e28ea8e77215de0cbf64926d5e612a4fedf831fb60af742a54eb31c8c/merged
tmpfs                     15G   12K   15G   1% /var/lib/kubelet/pods/703b1ac4-4611-4907-8f48-6744bb110565/volumes/kubernetes.io~projected/kube-api-access-hzn4t
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/f9e4bb045dfdb8efffd579b9cb24b6630318a4ac0d38b2e8260cb6ce51997175/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/ad9b91eca6dfe0ae93a8218ab7fb8da617bfdab144ce2296e2a06a82d3809dac/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/a0300ae0388d815cce10ee48114bdac8aecd49d04178eace769bfef4c769e2fe/merged
tmpfs                     15G   12K   15G   1% /var/lib/kubelet/pods/88a64f5f-4c29-4d75-9e2c-43da98067493/volumes/kubernetes.io~projected/kube-api-access-8d2nq
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/ef3e12f2438af5d263db9a8727b8802b62aa9f691d3507e110f9939fa4dc1810/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/25fea19596a4740e20b77c4e3cc931d64c03b4cce6ed35e18fc514f3399a3746/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/9998b57a41c97e3758aeef299d4d0baa07d0521ca21c560bf2c67e1ded979f67/merged
tmpfs                    170M   12K  170M   1% /var/lib/kubelet/pods/84fa4088-ad34-404c-a2b3-fd435fb577a0/volumes/kubernetes.io~projected/kube-api-access-cbxtp
tmpfs                    170M   12K  170M   1% /var/lib/kubelet/pods/0782e75a-32f0-42a6-ae1a-6a4d84de3a50/volumes/kubernetes.io~projected/kube-api-access-j52tx
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/e7a41d62dfdf83cf3dd7bc80d01a504dd63c50f06d63137812908b3e24d7e447/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/e0d1c2a94efed1e9eb65d76efce546f8daf03a562270f5adb34430dc559a5ac9/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/27220a1b82443e46faabb250f04f9d1b247bcc7d9d7b15ac5f87ee8319c945c7/mounts/shm
shm                       64M     0   64M   0% /var/lib/docker/containers/ee3db643fab8cb3002f34d70ec0982bfc400e53530a90cbd51548cf397c92724/mounts/shm
tmpfs                     15G   12K   15G   1% /var/lib/kubelet/pods/6b891b46-f749-4514-ba52-8f99cca16471/volumes/kubernetes.io~projected/kube-api-access-pknv7
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/820a74416ee3349dd8f4b5f01fe85604e9712289af847cac527506c4c5faddfb/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/160ee4e78f6777998142ea7cd1e7489517f5f7d2de2d44418bc39889ba7962b7/mounts/shm
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/b4f09d59b9fd4283ccd61283f764d056928d75cb5d5293fe6c56747cd02393b1/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/bbcb4282b665fabe6b586bc366c0973cea835e1ac0f08995481e79bded5b7560/merged
overlay                   17G   13G  4.9G  72% /var/lib/docker/overlay2/7b2ff0839257b9383e3049683bd7fc9069f72eef40f3f7c8e0acbce6a187c6b7/merged