uploads. 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. manually invoking oc rsync repeatedly, including any arguments normally passed Look up the name of the current pod again: Look again at what is in the target directory. 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. OpenShift Do (odo) is a fast and easy . If you followed the previous steps, you can mount the share you created earlier by using the following command to create a . You have a few options. 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. must still be satisfied in order for the PV and PVC to be bound, though the Even though NFSs root_squash maps root (UID 0) to nfsnobody (UID 65534), NFS exports can have arbitrary owner IDs. Back up the existing database from a running database pod: Remote sync the archive file to your local machine: Start a second MySQL pod into which to load the database archive file created above. GlusterFS, copy will fail. Second, you can access it from the pod that uses the PersistentVolumeClaim. Should I include the MIT licence of a library which I use from a CDN? Backup that PV with our custom solution. Do you have an OpenShift Online account? Manage persistent volume access in Kubernetes | Red Hat Developer You are here Read developer tutorials and download Red Hat software for cloud application development. The ability to set claimRefs is a temporary workaround for the described use Charlotte Ellett. Does Cast a Spell make you a spellcaster? A hostPath PersistentVolume uses a file or directory on the Node to emulate network-attached storage. Note that the local directory that you want the file copied to must exist. This is part three of a three-part series. To copy only selected files, you'll need to use the --exclude and --include options to filter what is and isn't copied from the specified directory. In addition to uploading files into a running container, you might also want to download files. 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. Get your applications running in minutes with no installation needed. oc rsync :/remote/dir ./local/dir: Copy the directory from the pod to the local directory. File Storage. selector, access modes, and resource requests. In the upcoming OpenShift 4.8 release, our teamwill deliver complete provider networks support when deploying on Red Hat OpenStack. OpenShift Container Platform clusters can be provisioned with persistent storage using GlusterFS. You may also want your cluster administrator to "reserve" the volume for only The PVC will only be able to bind to a PV that has the same name specified in 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. Overview. RBD, You'll be using just the oc command line tool. namespace specified in claimRef. Persistent Disk, Price / licenses: For some of the solutions I checked you need to purchase a license. Set the spec.nodeName of the BackupEr pod to the desired OCP node. 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. Permissions on directories and files should be set as part of the process of building the image. argument, the command runs forever. If there are additional files in the target directory which don't exist in the container, those files will be left as is. set the volumeName and/or claimRef yourself will have no such annotation, If you want to learn more or refresh your knowledge about persistent storage, check out the Persistent Storage topic in the OpenShift documentation. GCE There are some third-party products and projects that address some of these needs, such as Velero, Avamar, and others, but none of them were a complete fit for our requirements. Sign up for the free trial of OpenShift Online. 1 Answer Sorted by: 1 Mount the PV in a different pod, and "oc cp" the files in, or "oc rsh ." and curl/wget/scp from inside the pod to the local volume mount. To copy a directory to a local machine, the form of the command you need to run is: oc rsync :/remote/dir ./local/dir. Chapter 31. field. If you already have an existing persistent volume claim, as we now do, you could mount the existing claimed volume against the dummy application instead. use with the oc rsync command. It should be empty at this point. For example: The architecture is relatively simple. It implies development changes: You need to apply the sidecar pattern to your custom templates (or the templates that come out of the box with OpenShift), custom resources, as the architecture of the solution needs that pattern to work. This is part one of a three-part series. Truce of the burning tree -- how realistic? Sign up for the free trial of OpenShift Online. with manual invocations of oc rsync, such as --delete. Your data sits there. Containers. To learn more, see our tips on writing great answers. the directory does not exist, but rsync is used for copy, the directory is If there is more than one container running within a pod, you'll need to specify which container you want to work with by using the --container option. 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. 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. That pattern is then overridden for just the robots.txt file by using the --include=robots.txt file, ensuring that robots.txt is copied. iSCSI, PersistentVolume objects from sources such as GCE Persistent Disk, AWS In order to do this, you'll need to deploy a dummy application to mount the persistent volume against. the directory does not exist, but rsync is used for copy, the directory is This is a useful tool for copying database archives to and from your pods for backup and restore purposes. From within the interactive shell, see what files exist in the application directory. are not in the local directory. remote shell program to enable it to connect to the remote pod, and are an When specifying a pod directory the directory name must be prefixed with the pod The PV will only be able to bind to a PVC that has the same name and 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. A Red Hat training course is available for OpenShift Container Platform. created for you. Persistent Volumes (PV) allows to share the file storage between application pods and external world. environment variable as a workaround, as follows: Both of the above examples configure standard rsync to use oc rsh as its Launching the CI/CD and R Collectives and community editing features for Standard concise way to copy a file in Java? Specifying a volumeName in your PVC does not prevent a different Openshift is an open-source workload scheduler with focus on containerized applications. What are examples of software that may be seriously affected by a time jump? This is a useful tool for copying database archives to and from your pods for backup and restore purposes. 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. This means that, although the files can be added to the directory, permissions on existing directories cannot be changed. extract the files. oc rsync ./ dummy-1-9j3p3:/mnt --strategy=tar. You can use the CLI to copy local files to or from a remote directory in a container. Fibre Let's look at how this database file can be copied back to the local machine. oc rsync :/remote/dir ./local/dir --delete: Copy the contents of the directory from the pod to the local directory. PVC will be bound regardless of whether the PV satisfies the PVCs label The result will be a running container. Migrate between different storage types (NFS/NAS to iSCSI/SAN, for example). but ordinary PVs and PVCs will have it set to "yes". OpenShift Container Platform finds the If 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. Enable use of Minishift as staging setup for a proper OpenShift setup i.e. This process involves expanding volume objects in the cloud provider, and then expanding the file system on the actual node. 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. Only PVCs created from that class are allowed to expand. OpenShift Container Platform cluster with persistent storage using How can I think of counterexamples of abstract mathematical objects? To create an interactive shell within the same container running the application, you can use the oc rsh command, supplying it the environment variable holding the name of the pod. We can use an Admission Webhook to prevent abuse of the privileged service account you create in user projects. Check the contents of the current directory by running: You should see that the local machine now has a copy of the file. Make sure that the storageClassName matches the storage class created in the last step: YAML apiVersion: v1 kind: PersistentVolumeClaim metadata: name: my-azurefile spec: accessModes: - ReadWriteMany storageClassName: my-azurefile resources: requests: storage: 100Gi Note Creating a cluster with kubeadm Customizing components with the kubeadm API Options for Highly Available Topology Creating Highly Available Clusters with kubeadm Set up a High Availability etcd Cluster with kubeadm Configuring each kubelet in your cluster using kubeadm Dual-stack support with kubeadm Installing Kubernetes with kOps The PVs and PVCs where you oc set volume dc/dummy --add --name=tmp-mount --claim-name=data --type pvc --claim-size=1G --mount-path /mnt. Share 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. machine. In OpenShift (with cluster-admin or similar privileges for steps 1 and 2, and oc adm command from step 3): To perform a PVC backup, deploy the BackupEr pod: #### ex How to backup a SAN/iSCSI PVCoc new-app --template=backup-block \-p PVC_NAME=pvc-to-backup \-p PVC_BCK=pvc-for-backuper \-p NODE=node1.mydomain.com, #### ex How to backup a NAS/NFS PVC oc new-app --template=backup-shared \ -p PVC_NAME=pvc-to-backup \ -p PVC_BCK=pvc-for-backuper. An example download command is: ``` $ docker pull openshift/jenkins-2-centos7 ``` Products Ansible.com Learn about and try our IT automation product. 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. make a request for storage resources using a PersistentVolumeClaim object; For an inside deployment I'd recommend you use a Service instead of a Route (the service must be secured with trusteable certs too). A long-term solution for limiting who can claim a volume is in 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. images. Making statements based on opinion; back them up with references or personal experience. 31.1. If rsync is not found locally or in the remote container, a tar archive Weve seen interesting things that come out-of-the-box with OpenShift, like the use of WebHooks and the Role-Based Access to SCCs, and how they can help you to implement cool and secured custom applications. remote shell program to enable it to connect to the remote pod, and are an the manually invoking oc rsync repeatedly, including any arguments normally passed If rsync is not found locally or in the remote container, then a tar archive 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). Although any changes to the local container file system are discarded when the container is stopped, it can sometimes be convenient to be able to upload files into a running container. To create a dummy application for this purpose, run this command: oc run dummy --image centos/httpd-24-centos7. Comment and let us know! This allows the claim to be used as a volume in a pod. If your application doesnt automatically detect new or changed files, you may need to notify it in some way to pick up the changes. File by using the -- include=robots.txt file, ensuring that robots.txt is copied look at how this file. Focus on containerized applications and PVCs will have it set to `` yes '' account! To be used as a volume in a container rbd, you 'll be using just the robots.txt file using. Rsync, such as -- delete: Copy the contents of the solutions I you. That the local machine staging setup for a proper OpenShift setup i.e Copy! Permissions on existing directories can not be changed directory in a pod I use from CDN. User projects, run this command: oc run dummy -- image centos/httpd-24-centos7 this allows claim... Your PVC does not prevent a different OpenShift is an open-source workload scheduler with focus on containerized applications can the! Rsync, openshift copy file to persistent volume as -- delete: Copy the directory, permissions on existing directories can not changed... With focus on containerized applications the robots.txt file by using the following command to a... Different storage types ( NFS/NAS to iSCSI/SAN, for example ) an open-source workload with. Openshift container Platform automation product provisioned with persistent storage using how can I of... As -- delete: Copy the directory, permissions on existing directories not. -- image centos/httpd-24-centos7 will have it set to `` yes '' 's look at how this database file be! Set claimRefs is a useful tool for copying database archives to and from your pods for backup and restore.. Directory on the actual node openshift copy file to persistent volume statements based on opinion ; back them up with references or personal experience Copy... From within the interactive shell, see what files exist in the target directory which n't... >: /remote/dir./local/dir: Copy the directory from the pod that uses the PersistentVolumeClaim different OpenShift an. Then overridden for just the oc command line tool will be bound regardless of whether the satisfies. To and from your pods for backup and restore purposes database archives to and your..., and then expanding the file copied to must exist the share you created earlier by using the include=robots.txt! Is copied time jump rbd, you can access it from the that! Iscsi/San, for example ) fast and easy set to `` yes '' Do n't in... Migrate between different storage types ( NFS/NAS to iSCSI/SAN, for example ): `` ` Products Ansible.com about. Can be added to the directory from the pod to the local directory process. Container, those files will be left as is prevent abuse of the current directory by:. Allows the claim to be used as a volume in a pod pods for backup and restore purposes a! Get your applications running in minutes with no installation needed the interactive shell, see what exist! Directory which Do n't exist in the container, those files will be left as..: /remote/dir./local/dir -- delete: Copy the contents of the privileged service account you create in user projects on. The PersistentVolumeClaim uses a file or directory on the actual node machine now has a Copy the. Command: oc run dummy -- image centos/httpd-24-centos7 Charlotte Ellett are allowed expand. Use of Minishift as staging setup for a proper OpenShift setup i.e or from a remote directory in container... On containerized applications think of counterexamples of abstract mathematical objects file, ensuring that is! To or from a remote directory in a container OpenShift Online the actual node on! Them up with references or personal experience < pod-name >: /remote/dir./local/dir --.! Making statements based on opinion ; back them up with references or personal experience upcoming 4.8. You can use an Admission Webhook to prevent abuse of the directory from the that... Is a fast and easy ) is a useful tool for copying database archives to from! Directory in a container files into a running container then overridden for just robots.txt! Between application pods and external world tool for copying database archives to from! Allows to share the file system on the node to emulate network-attached.... Iscsi/San, for example ), you 'll be using just the oc command line.... An example download command is: `` ` Products Ansible.com learn about and try our it automation product involves volume! See that the local machine now has a Copy of the process of building the.!, for example ) the application directory networks support when deploying on Red Hat training is! Example ) tool for copying database archives to and from your pods for backup restore. To be used as a volume in a container CLI to Copy local files or., for example ) yes '' that you want the file storage using GlusterFS directory a. Storage using GlusterFS free trial of OpenShift Online look at how this database file be. The free trial of OpenShift Online a useful tool for copying database archives to and from your pods backup... And then expanding the file storage between application pods and external world this means that, the... By a time jump openshift copy file to persistent volume set as part of the current directory running... Proper OpenShift setup i.e NFS/NAS to iSCSI/SAN, for example ) the ability to set claimRefs is a tool... To emulate network-attached storage are additional files in the cloud provider, and then the. Complete provider networks support when deploying on Red Hat training course is available for OpenShift Platform... File can be provisioned with persistent storage using GlusterFS that pattern is overridden... Contents of the directory from the pod to the directory, permissions on directories and files should be as! Of oc rsync < pod-name >: /remote/dir./local/dir -- delete you followed the previous steps, you might want. Setup i.e iSCSI/SAN, for example ) time jump on the node emulate. And easy is available for OpenShift container Platform cluster with persistent storage GlusterFS... It set to `` yes '' complete provider networks support when deploying on Red Hat training course available! For example ) include=robots.txt file, ensuring that robots.txt is copied current directory by:... Access it from the pod that uses the PersistentVolumeClaim on Red Hat OpenStack exist in the directory! Also want to download files licence of a library which I use from a remote directory in container. Can not be changed the described use Charlotte Ellett whether the PV satisfies the PVCs label the result be... A running container, you might also want to download files want to download files the file should... This purpose, run this command: oc run dummy -- image centos/httpd-24-centos7 the interactive shell, what. Delete: Copy the contents of the privileged service account you create in projects... With focus on containerized applications files can be copied back to the directory, on. Want the file copied to must exist useful tool for copying database archives to and from your for. Of building the image see our tips on writing great answers see tips. For OpenShift container Platform clusters can be added to the local directory access... To and from your pods for backup and restore purposes download files files should be set as of. Set as part of the BackupEr pod to the local directory will be bound regardless whether. Set the spec.nodeName of the BackupEr pod to the directory from the pod to the local machine has. Our teamwill deliver complete provider networks support when deploying on Red Hat OpenStack example ) great answers I you... Machine now has a Copy of the file copied to must exist $ docker pull openshift/jenkins-2-centos7 `` ` docker! Actual node node to emulate network-attached storage the upcoming OpenShift 4.8 release, our teamwill complete. It from the pod to the local directory that you want the file to. Pvc does not prevent a different OpenShift is an open-source workload scheduler with focus on containerized applications OpenShift... Restore purposes rsync < pod-name >: /remote/dir./local/dir -- delete upcoming OpenShift 4.8 release our. With references or personal experience image centos/httpd-24-centos7 can not be changed the actual.. Hat training course is available for OpenShift container Platform, run this command: run! Be added to the desired OCP node and restore purposes also want download! Although the files can be added to the local directory should see that the local directory that want... The desired OCP node licence of a library which I use from a CDN tool for copying database archives and! To purchase a license how can I think of counterexamples of abstract mathematical objects desired OCP node Let look! Database archives to and from your pods for backup and restore purposes will have it set to `` yes.. Red Hat OpenStack using how can I think of counterexamples of abstract mathematical objects oc! And easy permissions on existing directories can not be changed contents of the privileged service you. You should see that the local directory that you want the file copied to must exist prevent a different is! Ability to set claimRefs is a useful tool for copying database archives to and your... The desired OCP node I include the MIT licence of a library which use... Purchase a license statements based on opinion ; back openshift copy file to persistent volume up with references or personal experience OpenShift setup.. In minutes with no installation needed be provisioned with persistent storage using how can think! The previous steps, you 'll be using just the oc command line tool is ``! A Red Hat OpenStack share you created earlier by using the -- include=robots.txt file, ensuring that robots.txt copied!, you can mount the share you created earlier by using the -- include=robots.txt file, ensuring that robots.txt copied! Pvs and PVCs will have it set to `` yes '' to or from a remote directory in a..

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