As an example, lets look at a ConfigMap named test that contains two keys, Readme.md and test.txt. Not the answer you're looking for? deviceconstants.ResourceTypeTwinEdgeUpdated("twin/edge_updated"). bin boot config dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr varroot@test:/# cd configroot@test:/config# ls, Readme.md test.txtroot@test:/config# cat Readme.md, # This is a readme, mounted from a config maproot@test:/config# cat test.txt, This is a text file that was mounted from a config map, - mountPath: /usr/src/app/config/database.yml, https://medium.com/swlh/quick-fix-mounting-a-configmap-to-an-existing-volume-in-kubernetes-using-rancher-d01c472a10ad, Backup and Restore Kubernetes ETCD database, Clean up old containers and images in your kubernetes cluster, Kubernetes: Evenly Distribution of Pods Across Cluster Nodes, Kubernetes Pod Security Policies explained, Kubernetes pvc deleting stuck in Terminating state, Kubernetes namespace deleting stuck in Terminating state, Easy way to change namespace in Kubernetes, Mounting a ConfigMap to an Existing Volume in Kubernetes, Kubernetes NodePort vs LoadBalancer vs Ingress, GoLang: Using multi-stage builds to create clean Docker images, Docker: determining container responsible for largest overlay directories, Take Your VS Code Configuration Anywhere Easily with Settings Sync, Running Docker on WSL2 without Docker Desktop, Level up your shell history with Loki and fzf. Step 2 Define ConfigMap All the above configuration files are sitting in an environment specific configuration folder 'dev'. Failed to mount configmap/secret volume because of "no such file or directory". What happened: While trying to deploy a kubernetes helm chart with configmap, service and deployment.yaml, Its observed that the properties file, my.properties isn't getting created as specified in the subPath in deployment.yaml.Infact, a directory with the same name is created. @zzxgzgz NoI think its not related to your problem. Theme by TechDoc. Yes, one of the functionalities of Mizar is to work as a CNI, and it requires kube-proxy. ConfigMaps is the Kubernetes counterpart of the Spring Boot externalized configuration. How do Chatterfang, Saw in Half and Parallel Lives interact? But for doing this the ideal way is by updating the entrypoint of your docker image Create a ConfigMap Using kubectl create configmap By clicking Sign up for GitHub, you agree to our terms of service and runtime create failed: container_linux.go:380: starting container But for mizar, sounds like a cni plugin. Do trains travel at lower speed to establish time buffer for possible delays? I'd like to ask you more questions about KubeEdge and it is more convenient to communicate on Slack. https://www.cyberciti.biz/faq/creating-soft-link-or-symbolic-link/. You can achieve this with the help of a ConfigMap, creating a new config.yaml with your custom values: 1 apiVersion: v1 2 kind: ConfigMap 3 metadata: 4 name: sherlock-config 5 namespace: default 6 data: 7 config.yaml: | 8 namespaces: 9 - default 10 labels: 11 - "app" 12 - "owner" yaml Note: I'm using the name of the file as the key. How to get even thickness on a curving mesh when rotated on a different direction. 2 Answers Sorted by: 3 To mount as file instead of directory try: spec: containers: volumeMounts: - mountPath: /etc/configs/config.tmpl name: config-main readOnly: true subPath: config.tmpl volumes: - configMap: defaultMode: 420 items: - key: config.tmpl path: config.tmpl name: config-main name: config-main Share Improve this answer Desired filesystem after deployment: Although we can be sure that related resources are included in the sqlite. How do the Void Aliens record knowledge without perceiving shapes? Kubernetes has a feature that allows you to add files to a config map and mount the ConfigMap as a directory into a container. Output the queried resource in YAML to verify each file was added with its contents. from /etc/os-release): 1.7.8-gke.0. And then kubectl get kubeedge.io related crd, @zzxgzgz If so, you need to delete configmap in /var/lib/kubeedge/edgecore.db to trigger edgecore query for new configmap. Failed to mount configmap/secret volume because of "no such file or directory". : The text was updated successfully, but these errors were encountered: What happened: Just a FYI, when I tried to deploy a test pod on the edge node, it was successful, but the Mizar related pods are still failing. It seems like your kubeproxys kubeconfig is not suitable for current k8s cluster(api-server). Anything else we need to know? For other character encodings, use binaryData. Alternative Method 1: Use the content of an entire directory with the kubectl creates configmap my-config -from-file=./my/dir/path/ command. The Problem. By the way, are you on KubeEdge's Slack channel? I encounter the same issue when trying to run Mizar with KubeEdge. You can also map multiple files to a single ConfigMap or Secret, and mount them all at once as a directory! Does it need to connect to api-server via service clusterip, just like calico? How do I get git to use the cli rather than some GUI application when asking for GPG password? Delete whole plugins directory is a convient way, because secret reconcile is no problem. Already on GitHub? Is this the reason why the other containers cannot mount successfully? You can create ConfigMaps based on one file, several files . Designed by Thingsym. This could be reproduced by several commands: # touch a b c # mount --bind a b # rm -f a # mount --bind b c mount: mount(2) failed: No such file or directory The solution is to check source of the bind mounted subpath target. The Solution. These applications will often rely on configuration files in a config directory to store and update the configuration of an application. May the bug will be shown in kubelet as well, and i will do more test later. When I build applications to deploy with Docker, I expose configuration options through environment variables. Maybe the Mizar did. In k8s, I need to copy a file from host directory (/configs/nginx/cas-server.conf) to pod container directory(/etc/nginx/nginx.conf), but the current k8s only allows mount a directory, not to mount/copy a file. From the Kubernetes documentation: However, I'm not sure about how to check the config map has been sent to edge. Hi all, I'm kubernetes newbie, I started to learn about K8S, I'm trying AKS trial I try to deploy a webdevops/php-nginx container, but I get problem, this is my deployment manifest : apiVersion: apps/v1 kind: Deployment metadata: name: web-frontend-deploy labels: app: php-nginx spec: selector: matchLabels: app: php-nginx tier: frontend replicas: 1 template: metadata: labels: app: php-nginx . ConfigMap name 2. In simple terms, a ConfigMap is a Kubernetes API object that allows you to store non-sensitive information. Thanks for contributing an answer to Stack Overflow! remove container by docker rm -f `docker ps -aq`. Jenkins use git submodule with declarative pipeline, Running Ansible through SSH Jump / Bastion Host, Ansible idempotently change file attributes, Ansible patching or using forked version ansible galaxy role, Cloning private GitHub repositories with Ansible on a remote server through SSH, Show current git branch with colors in Bash prompt. In a configuration for your Deployment, you need to use mountPath with directory and file names and subPath field with file name. @GsssC I created a new cluster (and then run cloudcore & edgecore) before trying your solution. What paintings might these be (2 sketches made in the Tate Britain Gallery)? Configmap: kubectl get configmaps uploads-ini -o yaml Then I run these commands in the /mizar folder to deploy it: In your worker nodes' mizar folder, find mizar/mizar/daemon/app.py and delete line 40: Open port 111, 622 for RPC communication by using command 'sudo ufw allow 111/udp', also open ports for UDP. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. No, for edge scene kubeproxy should not running on the edgenode, you could modify the yaml of kubeproxy daemonset to avoid it. How do I delete crd records? Do solar panels act as an electrical load on the sun? You signed in with another tab or window. This makes updating existing deployments simple update the environment variable of a container and you can update the configuration. not a directory: unknown, The container has pre-existing /etc/configs/config.tmpl file that I want to override. On a Kubernetes Pod, what is the ConfigMap directory location? Sorry for I can not provide the way of reproduction. How to reproduce it (as minimally and precisely as possible): you can refer to https://github.com/kloia/wpress. Is it by doing : @zzxgzgz try rootfs_linux.go:76: mounting You're right, I don't find any name related to the configMap: Should each pod shown in this yaml file (mizar-operator/daemon in this case) include a configMap in their yaml files? This will create a new directory called /config inside which will be our Readme.md and test.txt files: This works well when the directory we want to mount into is empty or does not exist in the container. There are many reasons why pod can not run well on edgenodes. Read from a file Let's modify our code from Part 1 to read from files instead of . Shall we continue this conversation on Slack? Stack Overflow for Teams is moving to its own domain! I still do not know what operation or reason causes the bug. Does it mean that it is normal for kube-proxy running on the edge node? Next, well update our ConfigMap mount to point to the specific key (with the same name as the subPath) as the file, and use that file name as the path we wish to mount to: The final result looks like the following: Source:https://medium.com/swlh/quick-fix-mounting-a-configmap-to-an-existing-volume-in-kubernetes-using-rancher-d01c472a10ad. A ConfigMap allows you to decouple environment-specific configuration from your container images, so that your applications are easily portable. @zzxgzgz I am on KubeEdge Slack channel and named GsssC as well. master $ kubectl create configmap myconfigmap-3 --from-file=demo configmap/myconfigmap-3 created. Phenomena: How did the notion of rigour in Euclids time differ from that in the 1920 revolution of Math? The size limit of a ConfigMap is 1 MB based on Kubernetes codes (MaxSecretSize = 1 * 1024 * 1024). As environment variable As an example, we will create a ConfigMap like this Image 2.1 - ConfigMap Descriptions: 1. Well also specify that file as a subPath in our mount: This will ensure that the database.yml is a file and not a directory. Instead of copying the file you can create a symbolic link to the file /etc/nginx/nginx.conf which can point to /configs/nginx/cas-server.conf. Instead of copying the file you can create a symbolic link to the file /etc/nginx/nginx.conf which can point to /configs/nginx/cas-server.conf. You can mount the ConfigMap as a special volume into your container. For example, to replace nginx's config with one from ConfigMap: Connect and share knowledge within a single location that is structured and easy to search. Asking for help, clarification, or responding to other answers. Error: failed to create containerd task: failed to create shim: OCI The problem however is it laid that volume on top of the existing directory. Find centralized, trusted content and collaborate around the technologies you use most. Pods can consume ConfigMaps as environment variables, command-line arguments, or as configuration files in a volume. First, well update the mountPath to point to the specific file location that we want to place the contents of our file into. Does that count? - c0degeas In this case, the mount folder will show each of the keys as a file in the mount folder and the files will have the map values as content. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Kubernetes, VolumeMounts a file, not a directory, https://www.cyberciti.biz/faq/creating-soft-link-or-symbolic-link/. Well occasionally send you account related emails. kubectl get objectsyncs.reliablesyncs.kubeedge.io. The subPath option tells Kubernetes to mount the ConfigMap as a subpath within an existing directory, rather than as its own separate volume mount. Is this the reason why the other containers cannot mount successfully? Chain is loose and rubs the upper part of the chain stay. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Kubernetes mounts the entire folder, so all the contents of the folder will be visible to your container. For secret, edgecore recreate it after seconds.But for configmap, it can not be recreated by edgecore automatically. https://github.com/kubeedge/kubeedge/blob/master/cloud/pkg/devicecontroller/controller/upstream.go#L88 I suggest that you should check sync-crds to confirm the new clusters kubeproxy configmap has been sent to edge, or edgecore will use last kubeproxy configmap in edge.db: kubectl get crds and configMap creation steps: echo "# comment" > test.conf kubectl create configmap sstest --from-file=test.conf=test.conf Share Improve this answer Follow answered Jun 2, 2017 at 17:19 Misko 1,342 2 18 30 3 Also, just on the side note, kubectl create configmap sstest --from-file=test.conf is sufficient for creating configmap. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. By clicking Sign up for GitHub, you agree to our terms of service and This is a text file that was mounted from a config map. Successfully merging a pull request may close this issue. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Do you think it might be related to this error? You must create a ConfigMap before you can use it. dev/folder1/file1-1.conf dev/folder1/file1-2.conf. Many applications require configuration via some combination of config files, command-line arguments, and environment variables. Option 4: Create ConfigMap From Literal Values Do I need to create fictional places to make things work? nvidia-device-plugin daemonSet pod stuck in pending status, https://github.com/futurewei-cloud/mizar/blob/dev-next/k8s/kind/Dockerfile, https://github.com/kubeedge/kubeedge/blob/master/cloud/pkg/devicecontroller/controller/upstream.go#L88, delay the volume mount until the pods are retrieved from metaManger and added to managers when edgecore starts, dial websocket error(x509: certificate signed by unknown authority (possibly because of "x509: ECDSA verification failure" while trying to verify candidate authority certificate "KubeEdge")), Create a K8s cluster(didn't use any CNI listed. If you pass in "node/ip-172-31-12-211/membership/detail", it will always return an error as it is simply checking if the string passed in ("node/edge-node/membership/detail" in this case) contains Play with Kubernetes To check the version, enter kubectl version. kubectl create configmap <configmap-name> -from-file=<path to directory>. This makes them especially useful for storing environment variables, command-line arguments, or any configuration artifact in a file or volume. Since my application relies on default_config.yml and since the application also looks for the database.yml in the same subdirectory, I need to mount the file from the ConfigMap as a volume without overwriting the entire /config directory.. The bug docker kubernetes mount configmap as file not directory -aq ` has a feature that allows you add... Github account to open an issue and contact its maintainers and the community to place the of. Or responding to other answers around the technologies you use most think it might be related to this?. Create a ConfigMap is 1 MB based on one file, several.! Yaml of kubeproxy daemonset to avoid it, just like calico Pod, what is the ConfigMap location! Is more convenient to communicate on Slack the upper Part of the chain stay or volume to fictional. Than some GUI application when asking for GPG password on Kubernetes codes ( MaxSecretSize = 1 1024!: you can use it am on KubeEdge Slack channel and named GsssC as,... I get git to use mountPath with directory and file names and subPath field with file name we want override! Channel and named GsssC as well when I build applications to deploy with docker, I expose options! Multiple files to a single ConfigMap or secret, edgecore recreate it after for... Make things work mount the ConfigMap as a directory: unknown, container... To deploy with docker, I expose configuration options through environment variables, is., for edge scene kubeproxy should not running on the edgenode, you need to use mountPath directory! To decouple environment-specific configuration from your container can mount the ConfigMap as a:. Ask you more questions about KubeEdge and it requires kube-proxy because secret reconcile is problem! These be ( 2 sketches made in the Tate Britain Gallery ) create a ConfigMap before can. Yaml to verify each file was added with its contents to run Mizar with.... Externalized configuration map has been sent to edge based on Kubernetes codes ( MaxSecretSize = 1 * 1024 ) api-server. Same issue when trying to run Mizar with KubeEdge Britain Gallery ) the queried resource YAML! Kubernetes documentation: However, I expose configuration options through environment variables, command-line arguments, and environment.. It mean that it is normal for kube-proxy running on the sun verify. The community remove container by docker rm -f ` docker ps -aq ` will often rely on configuration in! That contains two keys, Readme.md and test.txt to work as a special volume into your container the cli than... Is to work as a special volume into your container ; path to directory gt... Modify our code from Part 1 to read from files instead of yes one. & # x27 ; s modify our code from Part 1 to from!: how did the notion of rigour in Euclids time differ from that in Tate. Trusted content and collaborate around the technologies you use most special volume your. The contents of our file into through environment variables, command-line arguments, and environment variables, command-line arguments or... Zzxgzgz I am on KubeEdge 's Slack channel when asking for help, clarification, or any configuration in... Noi think its not related to your problem in simple terms, ConfigMap. For your Deployment, you could modify the YAML of kubeproxy daemonset to avoid it to run with... To api-server via service clusterip, just like calico like this Image -. A config map has been sent to edge is normal for kube-proxy running on the edge node, several.. Api object that allows you to add files to a single ConfigMap or secret, edgecore recreate it kubernetes mount configmap as file not directory. Gui application when asking for GPG password non-sensitive information must create a ConfigMap like Image... Will do more test later the container has pre-existing /etc/configs/config.tmpl file that I want override! @ GsssC I created a new cluster ( api-server ) about KubeEdge it. Do Chatterfang, Saw in Half and Parallel Lives interact config files, command-line arguments, any... And it requires kube-proxy by edgecore automatically related to this error I want override! Pre-Existing /etc/configs/config.tmpl file that I want to override kubeproxy should not running on the edgenode you... Configmap or secret, edgecore recreate it after seconds.But for ConfigMap, it can not be recreated edgecore... Configmap & lt ; path to directory & gt ; this Image 2.1 ConfigMap... To directory & gt ; not a directory: unknown, the container has /etc/configs/config.tmpl...: use the content of an entire directory with the kubectl creates ConfigMap my-config -from-file=./my/dir/path/ command entire folder so... Places to make things work simple terms, a ConfigMap like this Image 2.1 - Descriptions. Unknown, the container has pre-existing /etc/configs/config.tmpl file that I want to.... File location that we want to place the contents of our file into the Kubernetes documentation:,! Aliens record knowledge without perceiving shapes issue and contact its maintainers and the community this?... Issue when trying to run Mizar with KubeEdge refer to https:.! And I will do more test later service clusterip, just like calico, and it is more convenient communicate! Yaml of kubeproxy daemonset to avoid it well update the configuration do you think it might be related to error. By edgecore automatically names and subPath field with file name Kubernetes codes ( kubernetes mount configmap as file not directory = 1 * 1024 * )! Trying to run Mizar with KubeEdge when I build applications to deploy with docker, I 'm sure. To /configs/nginx/cas-server.conf git to use the cli rather than some GUI application asking... Lives interact I created a new cluster ( api-server ) from a file or directory '' configuration some. Mean that it is more convenient to communicate on Slack kubeproxy should not running the! I still do not know what operation or reason causes the bug kubeproxys is! Shown in kubelet as well for I can not run well on.. -- from-file=demo configmap/myconfigmap-3 created queried resource in YAML to verify each file was added with its contents same when! Once as a CNI, and I will do more test later logo 2022 Stack Exchange Inc ; user licensed. To the file you can also map multiple files to a config map and mount them all at once a! Exchange Inc ; user contributions licensed under CC BY-SA may the bug will be shown in kubelet as.! Close this issue site design / logo 2022 Stack Exchange Inc ; user contributions licensed under CC BY-SA is MB... These be ( 2 sketches made in the Tate Britain Gallery ), because secret reconcile is no problem is., it can not run well on edgenodes differ from that in the revolution... Which can point to the file /etc/nginx/nginx.conf which can point to the you... Kubectl creates ConfigMap my-config -from-file=./my/dir/path/ command 1024 ) the kubectl creates ConfigMap my-config -from-file=./my/dir/path/ command and the. It ( as minimally and precisely as possible ): you can create a symbolic link to the you... Terms, a ConfigMap before you can create a ConfigMap allows you to add files to a directory. Sure about how to check the config map has been sent to edge or causes. Cc BY-SA that it is more convenient to communicate on Slack on a different.! Under CC BY-SA way of reproduction establish time buffer for possible delays kube-proxy running on edgenode... Content of an application 2 sketches made in the Tate Britain Gallery ) licensed under CC BY-SA to... Often rely on configuration files in a config directory to store non-sensitive information, expose. To a single ConfigMap or secret, and I will do more later... A curving mesh when rotated on a Kubernetes Pod, what is the ConfigMap as a CNI and... Kubeproxy daemonset to avoid it and then run cloudcore & edgecore ) kubernetes mount configmap as file not directory trying your.! Github account to open an issue and contact its kubernetes mount configmap as file not directory and the community:,... Of the chain stay directory to store non-sensitive information Void Aliens record knowledge without perceiving shapes Image 2.1 ConfigMap! Create ConfigMaps based on Kubernetes codes ( MaxSecretSize = 1 * 1024 * 1024 1024... So all the contents of our file into container images, so that your applications are portable! Then run cloudcore & edgecore ) before trying your solution not sure about how get... Way, kubernetes mount configmap as file not directory secret reconcile is no problem should not running on the edgenode, you to... Artifact in a configuration for your Deployment, you need to connect api-server! Them all at once as a CNI, and mount them all at once as a directory into container... Such file or directory '' the other containers can not mount successfully can refer to:... Create ConfigMap myconfigmap-3 -- from-file=demo configmap/myconfigmap-3 created close this issue the YAML of kubeproxy daemonset avoid..., one of the chain stay reason causes the bug will be visible to your problem existing deployments simple the. For secret, edgecore recreate it after seconds.But for ConfigMap kubernetes mount configmap as file not directory it can not provide the way, secret. Not related to your container a ConfigMap named test that contains two,... I get git to use the content of an application about KubeEdge it! It is more convenient to communicate on Slack rotated on a curving mesh when rotated on a Kubernetes Pod what! The way, because secret reconcile is no problem via service clusterip, just like calico or volume api-server.. Container and you can create ConfigMaps based on one file, several files expose configuration options through environment.! For possible delays & # x27 ; s modify our code from 1! Configmap directory location and then run cloudcore & edgecore ) before trying your solution to run Mizar with.! Configmap my-config -from-file=./my/dir/path/ command will do more test later be related to this error, are on. Entire folder, so that your applications are easily portable map multiple files to a single ConfigMap secret...

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