本文介绍了Kubernetes ConfigMap 卷不在容器中创建文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
k8s 1.2 部署 本地，单节点 docker
k8s 1.2 deployed locally, single-node docker
我做错了吗?这对其他人有用还是在我的 k8s 部署中出现问题?
Am I doing something wrong? Is this working for everyone else or is something broken in my k8s deployment?
按照 ConfigMaps 指南中的示例，/etc/config/special.how 应该在下面创建，但不是:
Following the example in the ConfigMaps guide, /etc/config/special.how should be created below but is not:
[root@totoro brs-kubernetes]# kubectl create -f example.yaml
configmap "special-config" created
pod "dapi-test-pod" created
[root@totoro brs-kubernetes]# kubectl exec -it dapi-test-pod -- sh
/ # cd /etc/config/
/etc/config # ls
/etc/config # ls -alh
total 4
drwxrwxrwt 2 root root 40 Mar 23 18:47 .
drwxr-xr-x 7 root root 4.0K Mar 23 18:47 ..
/etc/config #
example.yaml
example.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: special-config
namespace: default
data:
special.how: very
special.type: charm
---
apiVersion: v1
kind: Pod
metadata:
name: dapi-test-pod
spec:
containers:
- name: test-container
image: gcr.io/google_containers/busybox
command: ["sleep", "100"]
volumeMounts:
- name: config-volume
mountPath: /etc/config
volumes:
- name: config-volume
configMap:
name: special-config
items:
- key: special.how
path: how.file
restartPolicy: Never
一致性测试失败摘要如下(由 jayunit100 要求运行).在这个 gist 中完整运行.
Summary of conformance test failures follows (asked to run by jayunit100). Full run in this gist.
Summarizing 7 Failures:
[Fail] ConfigMap [It] updates should be reflected in volume [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/configmap.go:262
[Fail] Downward API volume [It] should provide podname only [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/util.go:1637
[Fail] Downward API volume [It] should update labels on modification [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/downwardapi_volume.go:82
[Fail] ConfigMap [It] should be consumable from pods in volume with mappings [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/util.go:1637
[Fail] Networking [It] should function for intra-pod communication [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/networking.go:121
[Fail] Downward API volume [It] should update annotations on modification [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/downwardapi_volume.go:119
[Fail] ConfigMap [It] should be consumable from pods in volume [Conformance]
/home/schou/dev/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/util.go:1637
Ran 93 of 265 Specs in 2875.468 seconds
FAIL! -- 86 Passed | 7 Failed | 0 Pending | 172 Skipped --- FAIL: TestE2E (2875.48s)
FAIL
findmnt 的输出:
Output of findmnt:
[schou@totoro single-node]$ findmnt
TARGET SOURCE FSTYPE OPTIONS
/ /dev/mapper/fedora-root
│ ext4 rw,relatime,data=ordere
├─/sys sysfs sysfs rw,nosuid,nodev,noexec,
│ ├─/sys/kernel/security securityfs securit rw,nosuid,nodev,noexec,
│ ├─/sys/fs/cgroup tmpfs tmpfs ro,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/systemd cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/cpuset cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/net_cls,net_prio cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/memory cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/hugetlb cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/cpu,cpuacct cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/perf_event cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/pids cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/blkio cgroup cgroup rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/freezer cgroup cgroup rw,nosuid,nodev,noexec,
│ │ └─/sys/fs/cgroup/devices cgroup cgroup rw,nosuid,nodev,noexec,
│ ├─/sys/fs/pstore pstore pstore rw,nosuid,nodev,noexec,
│ ├─/sys/firmware/efi/efivars efivarfs efivarf rw,nosuid,nodev,noexec,
│ ├─/sys/kernel/debug debugfs debugfs rw,relatime
│ ├─/sys/kernel/config configfs configf rw,relatime
│ └─/sys/fs/fuse/connections fusectl fusectl rw,relatime
├─/proc proc proc rw,nosuid,nodev,noexec,
│ ├─/proc/sys/fs/binfmt_misc systemd-1 autofs rw,relatime,fd=32,pgrp=
│ └─/proc/fs/nfsd nfsd nfsd rw,relatime
├─/dev devtmpfs devtmpf rw,nosuid,size=8175208k
│ ├─/dev/shm tmpfs tmpfs rw,nosuid,nodev
│ ├─/dev/pts devpts devpts rw,nosuid,noexec,relati
│ ├─/dev/mqueue mqueue mqueue rw,relatime
│ └─/dev/hugepages hugetlbfs hugetlb rw,relatime
├─/run tmpfs tmpfs rw,nosuid,nodev,mode=75
│ ├─/run/user/42 tmpfs tmpfs rw,nosuid,nodev,relatim
│ │ └─/run/user/42/gvfs gvfsd-fuse fuse.gv rw,nosuid,nodev,relatim
│ └─/run/user/1000 tmpfs tmpfs rw,nosuid,nodev,relatim
│ └─/run/user/1000/gvfs gvfsd-fuse fuse.gv rw,nosuid,nodev,relatim
├─/tmp tmpfs tmpfs rw
├─/boot /dev/sda2 ext4 rw,relatime,data=ordere
│ └─/boot/efi /dev/sda1 vfat rw,relatime,fmask=0077,
├─/var/lib/nfs/rpc_pipefs sunrpc rpc_pip rw,relatime
├─/var/lib/kubelet/pods/fd20f710-fb82-11e5-ab9f-0862662cf845/volumes/kubernetes.io~secret/default-token-qggyv
│ tmpfs tmpfs rw,relatime
├─/var/lib/kubelet/pods/2f652e15-fb83-11e5-ab9f-0862662cf845/volumes/kubernetes.io~configmap/config-volume
│ tmpfs tmpfs rw,relatime
└─/var/lib/kubelet/pods/2f652e15-fb83-11e5-ab9f-0862662cf845/volumes/kubernetes.io~secret/default-token-6bzfe
tmpfs tmpfs rw,relatime
[schou@totoro single-node]$
推荐答案
感谢 @Paul Morie 帮助我诊断和解决这个问题(来自 github 问题):
Thanks to @Paul Morie for helping me diagnose and fix this (from github issue):
bingo，/var/lib/kubelet 的挂载传播方式是私有的.尝试将 kubelet 目录的挂载标志更改为 -v/var/lib/kubelet:/var/lib/kubelet:rw,shared
我还必须在我的 docker systemd 文件中将 MountFlags=slave 更改为 MountFlags=shared.
I also had to change MountFlags=slave to MountFlags=shared in my docker systemd file.
这篇关于Kubernetes ConfigMap 卷不在容器中创建文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！