openshift copy file to persistent volume

When doing this, we assign it a claim name of data so that we can refer to the claim by a set name later on. Charlotte Ellett. In calls. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Openshift Container Storage - copy file to persistent volume, The open-source game engine youve been waiting for: Godot (Ep. Persistent volumes (PVs) and persistent volume claims (PVCs) can share volumes across a single project. Does Cast a Spell make you a spellcaster? are not in the local directory. secretKey is a key name within that secret. I didnt mention this before, but I tried to keep it the installation steps as simple as possible, as this is a very interesting approach (GA since 3.11 and above). Second, you can access it from the pod that uses the PersistentVolumeClaim. You can see an example by reviewing the backup-block template. For an inside deployment I'd recommend you use a Service instead of a Route (the service must be secured with trusteable certs too). example, oc rsync creates the destination directory if it does not exist and To access it from a web browser, we also need to expose it by creating a Route: We can also monitor the deployment of the application by running: This command will exit once the deployment has completed and the web application is ready. manually invoking oc rsync repeatedly, including any arguments normally passed will remain set to the same PVC name and namespace even if the PVC or the whole PVC from binding to the specified PV before yours does. Enable use of Minishift as staging setup for a proper OpenShift setup i.e. This is a useful tool for copying database archives to and from your pods for backup and restore purposes. When a new container is started from the same container image, it reverts back to what was originally built into the image. In the upcoming OpenShift 4.8 release, our teamwill deliver complete provider networks support when deploying on Red Hat OpenStack. Just be aware that this will copy everything, including notionally hidden files or directories starting with .. The --no-perms option tells oc rsync to not attempt to update permissions; this avoids it failing and returning errors. | oc rsh nginx-12-6lfbo tar xofC - /usr/share/nginx/html . Find centralized, trusted content and collaborate around the technologies you use most. The --delete flag may be used to delete any files in the remote directory that In this post Graham will show the new persistent volumes features of version 1.1.3 of the All-in-One OpenShift virtual machine. namespace specified in claimRef. This is a useful tool for copying database archives to and from your pods for backup and restore purposes. Individual files are not currently supported. As the templates are responsible for creating the ServiceAccount and assigning our custom ClusterRole to that ServiceAccount, you dont need extra commands to start the backup process (this does not change from what we have seen before, in the Backup point). Monitor the process once again to confirm that the re-deployment has completed. All you need to do is supply the path where the persistent volume is mounted in the container as the target directory. What are examples of software that may be seriously affected by a time jump? However when I use Openshift Container Storage storage class (let's say cephfs), how can I actually add files to the PV (the operator that I want to install says that database ODBC drivers must be copied to PV and mounted). An example download command is: ``` $ docker pull openshift/jenkins-2-centos7 ``` Is lock-free synchronization always superior to synchronization using locks? Permissions on directories and files should be set as part of the process of building the image. Again, monitor the progress of the deployment so we know when it's complete, by running: To confirm that the persistent volume claim was successful, you can run: With the dummy application now running, and with the persistent volume mounted, find the name of the pod for the running application with the following command: This will return something like this, with your unique pod name that youll need to use in the following commands: We can now copy any files into the persistent volume, using the /mnt directory (where we mounted the persistent volume) as the target. This post is based on one of OpenShifts interactive learning scenarios. PersistentVolumeClaim to bind to, you can specify the PV in your PVC using the Products Ansible.com Learn about and try our IT automation product. What other topics would you like to see in the future on this blog? There's no reason to wait. Note that the local directory that you want the file copied to must exist. The backup.sh script then uses this SUID sed to arrange file access from the source to the target PVC: NOTE: You can see the complete Dockerfile and script at following URLs:- Dockerfile- backup.sh. Specifying a claimRef in a PV does not prevent the specified PVC from being A complete example of this can be found in the OpenShift documentation. If you're done with this persistent volume and perhaps needed to repeat the process with another persistent volume but with different data, you can unmount the persistent volume but retain the dummy application. container from the copied database archive directory: You now have two MySQL database pods running in your project with the archived Asking for help, clarification, or responding to other answers. this case, the administrator can specify the PVC in the PV using the claimRef Now create a file named azure-file-pvc.yaml and copy in the following YAML. They intercept requests to the master API prior to the persistence of a resource, but after the request is authenticated and authorized. oc set volume dc/dummy --add --name=tmp-mount --claim-name= --mount-path /mnt: Mount an existing persistent volume against a dummy application pod at the directory /mnt so that files can be copied into the persistent volume using oc rsync. We use the oc run command because it just creates a deployment configuration and managed pod. To copy the media directory from the container for our pod, we run: oc rsync blog-1-9j3p3:/opt/app-root/src/media . This OpenShift Commons Gathering will be held live in Amsterdam, The Netherlands and broadcast live to regional watch parties around the globe. Before starting, make sure that you're logged into your OpenShift cluster through the terminal and have created a project. AWS EBS, Launching the CI/CD and R Collectives and community editing features for Standard concise way to copy a file in Java? You may also want your cluster administrator to "reserve" the volume for only Charlotte Ellett. After step 3 binds the new SCC to the backup Service Account, , you can restore data when you want. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You can also use oc rsync to copy source code changes into a running pod for development debugging, when the running pod supports hot reload of source files. argument, the command runs forever. name: If the directory name ends in a path separator (/), only the contents of the directory are copied to the destination. Look up the name of the current pod again: Look again at what is in the target directory. name: Just as with standard rsync, if the directory name ends in a path separator (/), This allows the claim to be used as a volume in a pod. If you are mounting a persistent volume into the container for your application and you need to copy files into it, then oc rsync can be used in the same way as described previously to upload files. oc rsync :/remote/dir ./local/dir --delete: Copy the contents of the directory from the pod to the local directory. The source argument of the oc rsync command must point to either a local Transferring Files In and Out of Containers in OpenShift This is part one of a three-part series. Part one covered manually copying files into and out of a container. calls. In the above command, the --no-perms option is also used, because the target directory in the container, although writable by the group that the container is run as, is owned by a different user. In this post, you've learned about oc commands that you can use to copy files into a persistent volume. request for a resource with specific attributes, such as storage size. If you've followed the security recommendations to setup an NFS server to provision persistent storage to your OpenShift Container Platform (OCP) cluster, the owner ID 65534 is used as an example. On the worker nodes, let's add an extra disk. Comment and let us know! RBD, the directory does not exist, but rsync is used for copy, the directory is Your claim will remain environment variable as a workaround, as follows: Both of the above examples configure standard rsync to use oc rsh as its Adjust OpenShift Security Context Constraints (SCCs) once, before making your first backup: Add the adjusted SCC from step 1 to the ServiceAccount created by the template: A normal cluster user could use the Service Account, Now, to configure/enable our custom webhook you can use the following yaml, You dont need to change the SCC object (, Avoid losing all those assignments if you update the SCC. Specifying a volumeName in your PVC does not prevent a different binds them together. Persistent Disk, This paper explores how can we add a disk, create a file system on the immutable OS (RHCOS) in the OpenShift 4.x environment. OpenShift Container Platform cluster with persistent storage using Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee, Parent based Selectable Entries Condition. OpenShift Container Platform finds the Within the ecosystem of Red Hat OpenShift Networking is a new security-focused operator named Ingress Node Firewall that uses an extended Berkeley Packet Filter (eBPF) and eXpress Data Path (XDP) How to backup, clone and migrate Persistent Volume Claims on OpenShift, example of this can be found in the OpenShift documentation, Join OpenShift Commons Gathering at KubeCon EU, April 18, 2023, Your Guide to security hardening OpenShift using the compliance operator, OpenShift 4.12: Ingress Node Firewall Operator. your claim so that nobody elses claim can bind to it before yours does. The existing options I checked didnt fit my needs for a variety of reasons: For this reason I decided to implement a homemade solution. If there are additional files in the target directory which don't exist in the container, those files will be left as is. All you need to do is supply the path where the persistent volume is mounted in the container as the target directory. argument, the command runs forever. One example of where this might be done is during development when a dynamic scripting language is being used. File Storage. We can use an Admission Webhook to prevent abuse of the privileged service account you create in user projects. To copy our single database file from our pod, we run: oc rsync blog-1-9j3p3:/opt/app-root/src/db.sqlite3 . In addition to copying a single file, a directory can also be copied. When copying files to the container, it's required that the directory into which files are being copied exists, and that it's writable to the user or group that's running the container. must still be satisfied in order for the PV and PVC to be bound, though the Traditionally, backup and restore operations involve two different layers. Do you have an OpenShift Online account? hferentschik added a commit to hferentschik/minishift that referenced this issue Adding method to wait for completion of persisten 4404475 On an existing pod, you can also create a sidecar container with, e.g, busybox to mount the same PV and provide file copy tools if they're not present in the primary container. To copy a single file from the container to the local machine, the form of the command you need to run is: oc rsync :/remote/dir/filename ./local/dir. This is because the persistent volume is no longer mounted, and you're looking at the directory within the local container file system. The docker image doesn't need to run as root, but it requires a small but important trick before it is executed: You must have an OCP cluster running OpenShift version 3.9 or greater to provide the required, You must build the BackupEr container image and push it to your container registry, or use the custom templates, or simply. You have a few options. with manual invocations of oc rsync, such as --delete. oc set volume dc/dummy --add --name=tmp-mount --claim-name= --type pvc --claim-size=1G --mount-path /mnt: Claim a persistent volume and mount it against the dummy application pod at the directory /mnt so that files can be copied into the persistent volume using oc rsync. NFS, machine and the remote container. Create a file named blob-nfs-pvc.yaml and copy in the following YAML. OpenShift Do (odo) is a fast and easy . MySQL is used in the example below. A PersistentVolumeClaim is a I am trying to copy some files to a persistent volume that will be later on mounted on a pod. blog-1-9j3p3:/opt/app-root/src/htdocs --exclude=* --include=robots.txt --no-perms. make a request for storage resources using a PersistentVolumeClaim object; BackupEr also has its own PVC. Even though NFSs root_squash maps root (UID 0) to nfsnobody (UID 65534), NFS exports can have arbitrary owner IDs. Try, Buy, Sell Red Hat Hybrid Cloud Expanding persistent volume claims (PVCs) with a file system Expanding PVCs based on volume types that need file system resizing, such as GCE PD, EBS, and Cinder, is a two-step process. only sends files that are different between the source and the destination. Build, deploy and manage your applications across cloud- and on-premise infrastructure, Single-tenant, high-availability Kubernetes clusters in the public cloud, The fastest way for developers to build, host and scale applications in the public cloud. field. PVC will be bound regardless of whether the PV satisfies the PVCs label View this by running: Now that we have a running application, we next need to claim a persistent volume and mount it against our dummy application. That pattern is then overridden for just the robots.txt file by using the --include=robots.txt file, ensuring that robots.txt is copied. A PersistentVolume object is a storage resource in an OpenShift Container Platform cluster. rapidly changing file system does not result in continuous synchronization We can now copy some files into the persistent volume using the command: tar cf - . The --strategy=tar option indicates to use tar to copy the files rather than rsync. You can see the name of the pods corresponding to the running containers for this application by running: You only have one instance of the application, so only one pod will be listed, looking something like this: For subsequent commands which need to interact with that pod, you'll need to use the name of the pod as an argument. The backup script contains a little magic especially for this case: Setting the sticky bit on the sed executable makes the effective UID of sed processes that of the /usr/bin/sed executable files owner -- in this case, root -- rather than that of the user who executed it. In order to do this, you'll need to deploy a dummy application to mount the persistent volume against. file system changes, and synchronizes changes when they occur. oc rsync ./ dummy-1-9j3p3:/mnt --strategy=tar. sent 30 bytes received 40027 bytes 26704.67 bytes/sec total size is 39936 speedup is 1.00. development. The oc rsync command uses the local rsync command if present on the clients The openshift cluster install for 3.11 will ensure that credentials are provided and subsequently available on the nodes in the cluster to facilitate image pulling. We mount the persistent volume at /mnt inside of the container, which is the traditional directory used in Linux systems for temporarily mounting a volume. Deploy container and mount volume - CLI. A PersistentVolume object is a storage resource in an OpenShift Container Platform cluster. Check that all the resource objects have been deleted: Although we've deleted the dummy application, the persistent volume claim still exists, and can later be mounted against the actual application to which the data belongs. OpenShift Container Platform clusters can be provisioned with persistent storage using GlusterFS. Channel. If To copy a directory to a local machine, the form of the command you need to run is: oc rsync :/remote/dir ./local/dir. Backing up these files requires more consideration than backing up files that change less frequently, such as documents, pictures, or finished sound and video used for playback. 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machine instance, Cancelling the live migration of a virtual machine instance, Configuring virtual machine eviction strategy, Managing node labeling for obsolete CPU models, Diagnosing data volumes using events and conditions, Viewing information about virtual machine workloads, OpenShift cluster monitoring, logging, and Telemetry, Installing the OpenShift Serverless Operator, Listing event sources and event source types, Serverless components in the Administrator perspective, Integrating Service Mesh with OpenShift Serverless, Cluster logging with OpenShift Serverless, Configuring JSON Web Token authentication for Knative services, Configuring a custom domain for a Knative service, Setting up OpenShift Serverless Functions, Function project configuration in func.yaml, Accessing secrets and config maps from functions, Integrating Serverless with the cost management service, Using NVIDIA GPU resources with serverless applications. Ebs, Launching the CI/CD and R Collectives and community editing features for Standard concise way to copy a in... The worker nodes, let & # x27 ; s add an extra disk -- delete: copy the of... Command is: `` ` is lock-free synchronization always superior to synchronization using locks using --. Storage resources using a PersistentVolumeClaim is a I am trying to copy the files than... Be left as is cluster administrator to `` reserve '' the volume for only Charlotte Ellett permissions on and... The PersistentVolumeClaim when deploying on Red Hat OpenStack from your pods for backup restore! You may also want your cluster administrator to `` reserve '' the volume for Charlotte. The container for our pod, we run: oc rsync to not attempt to update permissions this., a directory can also be copied bind to it before yours does files into a persistent against! Looking at the directory within the local container file system resource in an container. Also be copied not attempt to update permissions ; this avoids it failing and returning errors just creates a configuration! Changes, and synchronizes changes when they occur < pod-name >: /remote/dir./local/dir -- delete and! Supply the path where the persistent volume claims ( PVCs ) can share volumes across a single.... Confirm that the re-deployment has completed files will be held live in,! File from our pod, we run: oc rsync blog-1-9j3p3: /opt/app-root/src/db.sqlite3 of oc rsync pod-name... Binds them together its own PVC copied to must exist is no longer mounted, synchronizes! Parties around the technologies you use most broadcast live to regional watch parties around the technologies use... -- no-perms option tells oc rsync blog-1-9j3p3: /opt/app-root/src/media different between the source and the.... Interactive learning scenarios CI/CD and R Collectives and community editing features for Standard concise way to copy a in! Parties around the globe the following YAML and returning errors volume is mounted in future! Abuse of the privileged Service Account you create in user projects when want. The files rather than rsync prior to the backup Service Account you create in projects... After the request is authenticated and authorized indicates to use tar to copy a file in Java our single file... Covered manually copying files into a persistent volume size is 39936 speedup is 1.00. development the... Topics would you like to see in the container as the target directory and.... Staging setup for a resource, but after the request is authenticated and authorized are additional files the. ` is lock-free synchronization always superior to synchronization using locks uses the PersistentVolumeClaim a is. As the target directory odo ) is a fast and easy later mounted! Worker nodes, let & # x27 ; s add an extra disk want the file to! Fast and easy are examples of software that may be seriously affected by a time jump that. Because the persistent volume is mounted in the container as the target directory which do n't exist the. A useful tool for copying database archives to and from your pods for backup and restore.... Openshift do ( odo ) is a useful tool for copying database archives to and from your pods backup. Standard concise way to copy a file in Java ) is a storage resource in OpenShift! Avoids it failing and returning errors single project seriously affected by a time?... Look again at what is in the following YAML before starting, make that... -- delete: copy the contents of the current pod again: look again what!, but after the request is authenticated and authorized in order to do this, you can it! Language is being used terminal and have created a project complete provider networks support when deploying Red! By using the -- no-perms to see in the following YAML '' the for... Permissions ; this avoids it failing and returning errors permissions ; this avoids it failing returning... Requests to the master API prior to the backup Service Account,, 'll... Other topics would you like to see in the future on this blog Account,, 'll. A PersistentVolume object is a storage resource in an OpenShift container Platform.! Files in the container as the target directory into your OpenShift cluster through the terminal have. -- include=robots.txt -- no-perms option tells oc rsync blog-1-9j3p3: /opt/app-root/src/db.sqlite3 pod again: look again at what is the... By reviewing the backup-block template collaborate around the globe openshift copy file to persistent volume should be set part... X27 ; s add an extra disk which do n't exist in the as! And easy your claim so that nobody elses claim can bind to before! Ebs, Launching the CI/CD and R Collectives and community editing features for Standard concise way copy... Superior to synchronization using locks centralized, trusted content and collaborate around the technologies you use most can see example! The robots.txt file by using the -- include=robots.txt -- no-perms option tells oc rsync, such storage! Volume claims ( PVCs ) can share volumes across a single project example of where might! And broadcast live to regional watch parties around the globe tar to copy files into persistent! Pull openshift/jenkins-2-centos7 `` ` $ docker pull openshift/jenkins-2-centos7 `` ` is lock-free synchronization always superior synchronization. ( UID 65534 ), NFS exports can have arbitrary owner IDs and managed.., trusted content and collaborate around the technologies you use most worker nodes, let & # x27 ; add. Has completed SCC to the local directory that you want the file copied to exist! Setup i.e they intercept requests to the master API prior to the local file! Aws EBS, Launching the CI/CD and R Collectives and community editing features for Standard concise way to copy files. Looking at the directory from the pod that uses the PersistentVolumeClaim software that may be seriously by... Covered manually copying files into and out of a container database archives to and your. Worker nodes, let & # x27 ; s add an extra disk after step 3 binds the new to... Teamwill deliver complete provider networks support when deploying on Red Hat OpenStack useful tool for copying database to! Our teamwill deliver complete provider networks support when deploying on Red Hat OpenStack robots.txt is copied bytes/sec total size 39936... Openshift 4.8 release, our teamwill deliver complete provider networks support when deploying on Red OpenStack. Based on one of OpenShifts interactive learning scenarios CI/CD and R Collectives community... Before starting, make sure that you want `` reserve '' the volume for only Charlotte.... ( UID 65534 ), NFS exports can have arbitrary owner IDs attributes such. Bytes 26704.67 bytes/sec total size is 39936 speedup is 1.00. development total size is 39936 is. From the container, those files will be later on mounted on pod. Prevent a different binds them together want the file copied to must exist confirm! Directory within the local directory that you want the file copied to exist! Has its own PVC volume that will be later on mounted on a pod you create in user projects will. Netherlands and broadcast live to regional watch parties around the technologies you use most you looking! ` $ docker pull openshift/jenkins-2-centos7 `` ` is lock-free synchronization always superior to synchronization using locks notionally... Originally built into the image Account,, you 'll need to do this you! Of OpenShifts interactive learning scenarios container, those files will be left as is synchronization... Is authenticated and authorized just be aware that this will copy everything, including hidden! See an example by reviewing the backup-block template files should be set as part of the process once to. Logged into your OpenShift cluster through the terminal and have created a project affected by a time?! Volumename in your PVC does not prevent a different binds them together permissions ; this avoids it and! Pod, we run: oc rsync blog-1-9j3p3: /opt/app-root/src/media a dummy to! The master API prior to the local container file system changes, and 're... May be seriously affected by a time jump and synchronizes changes when they occur -- --. Openshift 4.8 release, our teamwill deliver complete provider networks support when deploying on Red Hat OpenStack owner.... And community editing features for Standard concise way to copy a file Java. Being used are additional files in the future on this blog be later mounted!: oc rsync blog-1-9j3p3: /opt/app-root/src/htdocs -- exclude= * -- include=robots.txt -- no-perms option oc. Your cluster administrator to `` reserve '' the volume for only Charlotte Ellett option tells oc rsync < pod-name:. Service Account you create in user projects the globe volume for only Charlotte Ellett delete copy... Is started from the pod that uses the PersistentVolumeClaim that this will copy everything, including notionally hidden or. Only sends files that are different between the source and the destination n't exist in the target directory starting..! Have arbitrary owner IDs that robots.txt is copied and synchronizes changes when they occur bytes/sec size... Files or directories starting with rather than rsync as the target directory which do n't exist in the OpenShift. Time jump path where the persistent volume claims ( PVCs ) can share volumes a. The local directory that you want the file copied to must exist other topics would like. S add an extra disk ; s add an extra disk to mount the persistent volume have created project! Using a PersistentVolumeClaim object ; BackupEr also has its own PVC returning errors for a resource with specific attributes such... ) and persistent volume is mounted in the container for our pod, we run: oc,!
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openshift copy file to persistent volume 2023