如何在ConfigMap中将文件挂载为DaemonSet？
我有下面的nginx配置文件(名为nginx-daemonset.conf)，我想在我的Daemonset中使用它：
events {
worker_connections 1024;
}
http {
server {
listen 80;
location / {
proxy_pass http://my-nginx;
}
}
}我使用以下命令创建了一个ConfigMap：kubectl create configmap nginx2.conf --from-file=nginx-daemonset.conf
我有下面的DaemonSet ( nginx -daemonset installment.yml)，在其中我试图挂载这个ConfigMap -因此使用了前面的nginx配置文件：
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx-daemonset
namespace: kube-system
labels:
k8s-app: nginx-daemonset
spec:
selector:
matchLabels:
name: nginx-daemonset
template:
metadata:
labels:
name: nginx-daemonset
spec:
tolerations:
# this toleration is to have the daemonset runnable on master nodes
# remove it if your masters can't run pods
- key: node-role.kubernetes.io/master
effect: NoSchedule
containers:
- name: nginx
image: nginx
resources:
limits:
memory: 200Mi
requests:
cpu: 100m
memory: 200Mi
volumeMounts:
- name: nginx2-conf
mountPath: /etc/nginx/nginx.conf
subPath: nginx.conf
volumes:
- name: nginx2-conf
configMap:
name: nginx2.conf我使用kubectl apply -f nginx-daemonset-deployment.yml部署了这个with，但是新创建的Pod由于以下错误而崩溃：
Error: failed to start container "nginx": Error response from daemon: OCI runtime create failed: container_linux.go:370: starting container process caused: process_linux.go:459: container init caused: rootfs_linux.go:59: mounting "/var/lib/kubelet/pods/cd9f6f7b-31db-4ab3-bbc0-189e1d392979/volume-subpaths/nginx2-conf/nginx/0" to rootfs at "/var/lib/docker/overlay2/b21ccba23347a445fa40eca943a543c1103d9faeaaa0218f97f8e33bacdd4bb3/merged/etc/nginx/nginx.conf" caused: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type
我以前用不同的nginx配置做了另一次部署，一切都很顺利，所以这个问题可能与DaemonSet有关。
请注意，如何克服此错误并正确挂载配置文件？
回答 1
Stack Overflow用户
发布于 2020-11-01 13:05:30
首先，将您的配置文件创建为类似于nginx的ConfigMap：
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx-conf
data:
envfile: |
events {
worker_connections 1024;
}
http {
server {
listen 80;
location / {
proxy_pass http://my-nginx;
}
}
}然后用DaemonSet创建您的configMap、卷、configMap和finial y挂载volumeMounts：
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nginx
spec:
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- name: http
containerPort: 80
volumeMounts:
- mountPath: /etc/nginx/nginx.conf
subPath: nginx.conf
readOnly: true
name: nginx-vol
volumes:
- name: nginx-vol
configMap:
name: nginx-conf
items:
- key: envfile
path: nginx.conf注意，对于文件挂载，而不是目录挂载，您必须使用"path in configMap“和"subPath in volumeMounts”。
https://stackoverflow.com/questions/64631969
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