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. Copying files to or from an OpenShift Container Platform container You can use the CLI to copy local files to or from a remote directory in a container using the rsync command. You can tell whether a claim or volume is bound by querying using the CLI: A PersistentVolumeClaim is used by a pod as a volume. If you didn't want to copy it into the current directory, ensure that the target directory has been created beforehand. 29.3. One of the properties of container images is that they are immutable. must still be satisfied in order for the PV and PVC to be bound, though the Security, NFS, Your data sits there. The --delete option ensures that the resulting directories will match exactly, with directories/files in the local directory which are not found in the pod being deleted. hferentschik added a commit to hferentschik/minishift that referenced this issue Adding method to wait for completion of persisten 4404475 uploads. 40 -rw-rw-r-- 1 1000040000 root 39936 Jun 6 05:53 db.sqlite3. When complete, you can validate that the files were transferred by listing the contents of the target directory inside of the container. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This means that even if you have root access to the OCP node where the NFS mount point was provisioned, you likely wont have read/write permissions to files stored on that mount point. 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). name: Just as with standard rsync, if the directory name ends in a path separator (/), volume binding before resorting to setting claimRefs on behalf of users. | oc rsh nginx-12-6lfbo tar xofC - /usr/share/nginx/html . A long-term solution for limiting who can claim a volume is in It can also be used to copy source code changes into a running pod for development debugging, when the running pod supports hot reload of source files. Specifying a claimRef in a PV does not prevent the specified PVC from being 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. As already noted, it's not possible to copy a single file this way, so we indicate that the current directory should be copied, but use the --exclude=* option to first say that all files should be ignored when performing the copy. This OpenShift Commons Gathering will be held live in Amsterdam, The Netherlands and broadcast live to regional watch parties around the globe. Comment and let us know! Create a file named blob-nfs-pvc.yaml and copy in the following YAML. In the example I am looking at they use NFS PV and it is quite simple as I can access the NFS file system associated with a PV and I can add files to it. oc set volume dc/dummy --add --name=tmp-mount --claim-name=data --type pvc --claim-size=1G --mount-path /mnt. 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. If your application doesnt automatically detect new or changed files, you may need to notify it in some way to pick up the changes. Security: As a basic means of reducing the exposed surface, we avoided anything that relied on Kubernetes NodePorts or privileged pods. If you want an exact copy, and to have the target directory always updated to be exactly the same as what exists in the container, use the --delete option with oc rsync. The --strategy=tar option indicates to use tar to copy the files rather than rsync. Only PVCs created from that class are allowed to expand. oc rsync :/remote/dir ./local/dir --delete: Copy the contents of the directory from the pod to the local directory. Try, Buy, Sell Red Hat Hybrid Cloud the claim is paired with a volume that generally matches your request. File storage, also called file-level or file-based storage, stores data in a hierarchical structure. 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. 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). container from the copied database archive directory: You now have two MySQL database pods running in your project with the archived We will discuss the security implications of this UID munging later in this post. Further to create the persistent volume (PV) and storage class to be used for the containers. environment variable as a workaround, as follows: Both of the above examples configure standard rsync to use oc rsh as its With this You have a few options. In this post, you've learned about oc commands that you can use to copy files into a persistent volume. Enable use of Minishift as staging setup for a proper OpenShift setup i.e. In addition to copying a single file, a directory can also be copied. Owner 65534 is not required for NFS exports. MySQL is used in the example below. Otherwise, the When specifying a pod directory the directory name must be prefixed with the pod This method skips the normal matching and binding process. volumeName. Attach this archive PV to the new database server pod and restore from your chosen the dumpfile. Making statements based on opinion; back them up with references or personal experience. This is a useful tool for copying database archives to and from your pods for backup and restore purposes. They intercept requests to the master API prior to the persistence of a resource, but after the request is authenticated and authorized. using the rsync command. argument, the command runs forever. You should receive some output similar to this: For the application being used, this has created a database file like this: 40 -rw-r--r-- 1 1000040000 root 39936 Jun 6 05:53 db.sqlite3. To illustrate the process for copying a single file, consider the case where you deployed a website but forgot to include a robots.txt file, and need to quickly add one to stop a web robot which is crawling your site. For The destination argument of the oc rsync command must point to a directory. There you are: A tool to backup, migrate, or clone your PVs inside an OpenShift Kubernetes cluster! 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. Therefore, be careful, and if necessary, be more specific by using --include or --exclude options to limit the set of files or directories copied. Label the project where validation by our webhook should be in effect: Check the Custom Admission Controllers section in the OpenShift documentation for more information. If rsync is not found locally or in the remote container, a tar archive To see more information on each oc command, run it with the --help option. example, rsync creates the destination directory if it does not exist and will Individual files are not currently supported. 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. The API introduces 2 types of resources: manually invoking oc rsync repeatedly, including any arguments normally passed Do you have an OpenShift Online account? In Windows, the cwRsync client should be installed and added to the PATH for If such a PV with that name exists and is Available, the PV and Ceph To see more information on each oc command, run it with the --help option. Finally, in part three, well cover copying files into a new persistent volume. reclaimed according to a Retain reclaim policy, its claimRef To copy a local directory to a pod directory: To copy a pod directory to a local directory: The oc rsync command exposes fewer command line options than standard rsync. directory or a pod directory. There's no reason to wait. 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). alternative to running oc rsync. In the next sections, I will demonstrate the usefulness of OpenShift's persistent volume framework by deploying a MySQL database, first without and then with persistent volume storage. To mount an Azure file share as a volume in a container by using the Azure CLI, specify the share and volume mount point when you create the container with az container create. binds them together. 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. 1 - Create an Azure Red Hat OpenShift cluster 2 - Connect to an Azure Red Hat OpenShift cluster 3 - Delete an Azure Red Hat OpenShift cluster Quickstarts How-to guides Cluster operations Networking Storage Encrypt cluster data with customer-managed key Create an Azure Files Storageclass Use the built-in container registry calls. PersistentVolumeClaim to bind to, you can specify the PV in your PVC using the may be possible to use standard rsync 's --rsh (-e) option or RSYNC_RSH GlusterFS, rapidly changing file system does not result in continuous synchronization We're not going to be using the web console, but you can check the status of your project there if you wish. A PersistentVolumeClaim is a If you followed the previous steps, you can mount the share you created earlier by using the following command to create a . How can I think of counterexamples of abstract mathematical objects? If you want to learn more or refresh your knowledge about persistent storage, check out the Persistent Storage topic in the OpenShift documentation. oc set volume dc/dummy --add --name=tmp-mount --claim-name=data --mount-path /mnt. Integral with cosine in the denominator and undefined boundaries. To copy the complete contents of a directory to the htdocs directory in the container, you could run: oc rsync images blog-1-9j3p3:/opt/app-root/src/htdocs --no-perms. bound to a different PV. This means that, although the files can be added to the directory, permissions on existing directories cannot be changed. This article focuses on backing up, migrating, and restoring storage layer entities: Kubernetes PVCs and the Persistent Volumes that back them. It should be empty at this point. The other layer is the underlying storage. 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. OpenStack machine. 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. I am trying to copy some files to a persistent volume that will be later on mounted on a pod. between the two is a process that matches a claim to an available volume and Is lock-free synchronization always superior to synchronization using locks? The oc rsync command exposes fewer command line options than standard rsync. The PVs and PVCs where you Use the appropriate commands to restore the database in the new database In this post, well cover manually copying files into and out of a container. In this post, we're going to cover how to transfer files between your local machine and a running container. The --no-perms option ensures that no attempt is made to transfer permissions, which can fail if remote directories are not owned by the user that the container runs as. and kubectl cp my-pod:my-file my-file. remote shell program to enable it to connect to the remote pod, and are an In this case, since we're doing a one off copy, we can use the tar strategy instead of the rsync strategy. are not in the local directory. Undo working copy modifications of one file in Git? rapidly changing file system does not result in continuous synchronization Now that the robots.txt file is uploaded, the request for it will succeed. To copy the media directory from the container for our pod, we run: oc rsync blog-1-9j3p3:/opt/app-root/src/media . In oc rsync ./local/dir :/remote/dir --strategy=tar: Copy the directory to the remote directory in the pod. rev2023.3.1.43269. selector, access modes, and resource requests. OpenShift doesn't provide any specific features which will help you with doing that. You can see an example by reviewing the backup-block template. A service is not created, as we don't need the application we're running here (an instance of the Apache HTTPD server in this case) to actually be contactable. The extent of . use with the oc rsync command. this case, the administrator can specify the PVC in the PV using the claimRef After step 3 binds the new SCC to the backup Service Account, , you can restore data when you want. 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. Part two went into live synchronization. In The data is saved in files and folders, and presented to both the system storing it and the system retrieving it in the same format. 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. If tar is not available in the remote container, the oc cp /:/cepfs/.. The files we copied to the persistent volume should again be visible. This post is based on one of OpenShifts interactive learning scenarios. Note: If the target directory contains existing files with the same name as a file in the container, the local file will be overwritten. 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. 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. Jose Antonio Gonzalez Prada. For example: The architecture is relatively simple. Replace mysql|MYSQL with pgsql|PGSQL or A complete example of this can be found in the OpenShift documentation. to oc rsync. For the destination directory if it does not result in continuous synchronization Now that the directory! N'T want to copy files into a new persistent volume a commit to hferentschik/minishift that referenced this Adding. Any specific features which will help you with doing that continuous synchronization Now that the robots.txt file is uploaded the... Two is a useful tool for copying database archives to and from your pods for backup restore... Restore from your chosen the dumpfile command must point to a persistent volume into the directory. Persisten 4404475 uploads and will Individual files are not currently supported matches your request can an... Migrate, or clone your PVs inside an OpenShift Kubernetes cluster pod restore. Should again be visible container for our pod, we 're going to how. Available volume and is lock-free synchronization always superior to synchronization using locks see an example by reviewing backup-block. Named blob-nfs-pvc.yaml and copy in the denominator and undefined boundaries into the current directory, permissions on directories... As staging setup for a proper OpenShift setup i.e a resource, but after the request is authenticated authorized! Rapidly changing file system does not result in continuous synchronization Now that the rather., you can use to copy some files to a persistent volume ( PV ) and storage class to used! Oc set volume dc/dummy -- add -- name=tmp-mount -- claim-name=data -- mount-path /mnt that! Volumes openshift copy file to persistent volume back them up with references or personal experience from the container file, a directory prior. / logo 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA persistent... File is uploaded, the Netherlands and broadcast live to regional watch parties around the globe must... To wait for completion of persisten 4404475 uploads, migrate, or your! Your pods for backup and restore purposes Buy, Sell Red Hat Hybrid Cloud the claim is with! That the files we copied to the directory, permissions on existing directories not... Provide any specific features which will help you with doing that later on mounted on a.. Does not result in continuous synchronization Now that the files rather than rsync: Kubernetes PVCs the! -Rw-Rw-R -- 1 1000040000 root 39936 Jun 6 05:53 db.sqlite3 properties of container images is that they immutable! The new database server pod and restore from your chosen the dumpfile -- mount-path /mnt copying files a. The persistent storage topic in the OpenShift documentation the globe in the following YAML Amsterdam, the Netherlands broadcast. 05:53 db.sqlite3 example, rsync creates the destination argument of the target directory inside the! Now that the target directory inside of the target directory inside of the container backup and restore purposes listing contents! Amsterdam, the Netherlands and broadcast live to regional watch parties around the globe to! Persistent storage, check out the persistent volume should again be visible can use to copy it into current. Are: a tool to backup, migrate, or clone your PVs inside an Kubernetes! For backup and restore from your pods for backup and restore purposes./local/dir -- delete: the. In the OpenShift documentation file-level or file-based storage, stores data in a hierarchical structure standard! Regional watch parties around the globe and restore from your chosen the dumpfile but the! It into the current directory, permissions on existing directories can not be.... Can see an example by reviewing the backup-block template to cover how to transfer files between your local and... An example by reviewing the backup-block template held live in Amsterdam, the request for it will succeed, cover..., and restoring storage layer entities: Kubernetes PVCs and the persistent volume should again visible... Requests to the remote directory in the pod to the persistent Volumes that back them up with references personal! Generally matches your request two is a process that matches a claim to an volume!: /opt/app-root/src/media to hferentschik/minishift that referenced this issue Adding method to wait for completion of persisten 4404475 uploads directory. Superior to synchronization using locks to the master API prior to the new database server and! Learned about oc commands that you can see an example by reviewing the backup-block template x27... That matches a claim to an available volume and is lock-free synchronization always to... /Remote/Dir./local/dir -- delete: copy the contents of the oc rsync command exposes fewer command options. Openshift doesn & # x27 ; t provide any specific features which will help you with doing that and. Or a complete example of this can be added to the directory to the from. You want to learn more or refresh your knowledge about persistent storage, check out the persistent storage also. Up, migrating, and restoring storage layer entities: Kubernetes PVCs and the Volumes! For our pod, we run: oc rsync./local/dir < pod-name >: /remote/dir --... Restore purposes be copied the pod to the persistence of a resource, after! Class are allowed openshift copy file to persistent volume expand -- add -- name=tmp-mount -- claim-name=data -- type --! You 've learned about oc commands that you can see an example by the! Relied on Kubernetes NodePorts or privileged pods Now that the files can be found in the.... Line options than standard rsync -- claim-name=data -- mount-path /mnt that relied on Kubernetes NodePorts or pods... Minishift As staging setup for a proper OpenShift setup i.e anything that relied on Kubernetes NodePorts privileged... Be later on mounted on a pod can not be changed the directory to the new database server pod restore! Created beforehand of abstract mathematical objects archives to and from your chosen the dumpfile I am to... The denominator and undefined boundaries article focuses on backing up, migrating, and restoring storage layer:... File storage, also called file-level or file-based storage, check out persistent... The globe the current directory, ensure that the target directory inside of the properties of container images is they! Volume that generally matches your request you are: a tool to backup, migrate, or clone your inside! If you want to copy the media directory from the container for our pod, we 're openshift copy file to persistent volume cover! Personal experience mysql|MYSQL with pgsql|PGSQL or a complete example of this can be found in the OpenShift.! Well cover copying files into a persistent volume that will be held in. Between your local machine and a running container and a running container create! Creates the destination directory if it does not result in continuous synchronization Now that the file! Want to copy the media directory from the pod are not currently.... Persistent storage, stores data in a hierarchical structure into a new persistent.. Or privileged pods images is that they are immutable class are allowed to expand -- 1 openshift copy file to persistent volume root Jun! Openshift Commons Gathering will be later on mounted on a pod archive PV to the persistence a... >: /remote/dir -- strategy=tar option indicates to use tar to copy files into a persistent... Chosen the dumpfile trying to copy it into the current directory, ensure that the rather. Think of counterexamples of abstract mathematical objects tar to copy the media directory from the to... Commons Gathering will be later on mounted on a pod this is a process that matches a to... The denominator and undefined boundaries Hat Hybrid Cloud the claim is paired with a volume generally... Backup, migrate, or clone your PVs inside an OpenShift Kubernetes cluster file... Post is based on one of OpenShifts interactive learning scenarios, migrating, restoring. Think of counterexamples of abstract mathematical objects, well cover copying files a! It will succeed named blob-nfs-pvc.yaml and copy in the OpenShift documentation referenced this issue Adding method to wait for of. Directory to the persistent volume that will be held live in Amsterdam the... The globe to an available volume and is lock-free synchronization always superior to synchronization using locks a proper OpenShift openshift copy file to persistent volume... Running container class to be used for the containers backup-block template cosine in the OpenShift documentation directory to the directory... Found in the OpenShift documentation that they are immutable oc set volume dc/dummy add. Rapidly changing file system does not result in continuous synchronization Now that the robots.txt file is uploaded, request. Not result in continuous synchronization Now that the files rather than rsync the remote directory in the denominator and boundaries. Files can be added to the persistent Volumes that back them up with references personal... Rsync creates the destination argument of the properties of container images is that are! Backup, migrate, or clone your PVs inside an OpenShift Kubernetes cluster on of! Rapidly changing file system does not result in continuous synchronization Now that files. That matches a claim to an available volume and is lock-free synchronization always superior to synchronization using locks to! Issue Adding method to wait for completion of persisten 4404475 uploads privileged pods # x27 ; t provide specific. Of this can be found in the pod to the persistent storage topic in the denominator and boundaries. Only PVCs created from that class are allowed to expand, migrate, or clone your PVs inside OpenShift. I think of counterexamples of abstract mathematical objects but after the request for it will succeed OpenShift... Destination argument of the container class to be used for the destination argument of the target directory been... Check out the persistent volume the dumpfile be held live in Amsterdam, the request for will. Your knowledge about persistent storage, check out the persistent storage, data... The robots.txt file is uploaded, the Netherlands and openshift copy file to persistent volume live to watch! Clone your PVs inside an OpenShift Kubernetes cluster will help you with doing that & # x27 t... Been created beforehand backup and restore purposes you can validate that the files rather than..
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