Data will persist restarts, as long as you don't clear all data or factory reset, but will not be (easily) accessible from the host. This is a docker image with many standard packages for git, text editors, zsh, and active cron. It's acceptable (but still very slow) if you use the cachedor delegatedoption. Which is an old issue related to the fact that we are mounting with samba, and that the owner will never be the user of the container ġ/ simply hostMount-ing a folder in the VM ( so outside of /host_mnt ). Revisiting Docker for Mac's performance with NFS volumes Matl dr: Docker's default bind mount performance for projects requiring lots of I/O on macOS is abysmal. 14:39:57.111 UTC HINT: The server must be started by the user that owns the data directory. 14:39:57.111 UTC FATAL: data directory "/var/lib/postgresql/data" has wrong ownership There are different types of volumes you can use in a Kubernetes pod: Node-local memory ( emptyDir and hostPath) Cloud volumes (e.g. Pod is in CreateContainerError status Informationīelow are reference to the yml and the commandline output.Īny pointer to a working setup would be appreciated.Ĭommandline output from powershell terminalĬlient Version: version.Info Steps to reproduce the behavior To understand what persistent volumes are, we first need to explain how volume types differ. "Error: Error response from daemon: invalid mode: /var/lib/postgresql/data" Expected behaviour
When digging into it further I see there an invalid mode in the mount. Above output confirms that PV has been created successfully and it is available.
Run following kubectl command to verify the status of persistent volume. When creating the pod I it does not start and ends up in a CreateContainerError status. To create an NFS based persistent volume in K8s, create the yaml file on master node with the following contents, Now create persistent volume using above created yaml file, run. I have a simple postgres setup that uses a persistence volume claim to retain its data. If you use a UID/GID other than 1999/1999, provide it during the CDF installation in the installation script arguments -system-group-id and -system-user-id.I have an issue with docker and kubernetes on windows. Mkdir -p /opt/arcsight/nfs/volumes/itom-volįor each NFS directory, set the permission to 755 using the command:Ĭhmod -R 755 /opt/arcsight/nfs/volumes/itom-volįor each NFS directory, set the ownership to UID 1999 and GID 1999 using the command:Ĭhown -R 1999:1999 /opt/arcsight/nfs/volumes/itom-vol Rm -rf /opt/arcsight/nfs/volumes/itom-volĬreate each NFS shared directory using the command: (Conditional) If you have previously installed any version of CDF, you must remove all NFS directories using the following command for each directory: Root directory under which you can create all NFS shared directories.Įxample (NFS_Root_Directory): /opt/arcsight/nfs/volumes Im not aware of any performance issues directly related to Docker and NFS, but I wonder if creating a docker volume of type NFS would make Docker more 'NFS aware. The default value is dependent on the value of the POD_CIDR parameter, as described in the following table. The CIDR_SUBNETLEN parameter specifies the size of the subnet allocated to each host for Kubernetes pod network addresses. The minimum useful network prefix is /24 and the maximum useful network prefix is /8. CIDR notation comprises an IP address, a slash (/) character, and a network prefix (a decimal number).
The expected value is a Classless Inter-Domain Routing (CIDR) format IP address. A Docker volume is a directory on disk or in another container. The address range specified in the -POD_CIDR parameter must not overlap with the IP range assigned for Kubernetes services, which is specified in the –SERVICE_CIDR parameter. Docker has a concept of volumes, though it is somewhat looser and less managed. The -POD_CIDR parameter specifies the network address range for Kubernetes pods. The Kubernetes network subnet is controlled by the -POD_CIDR and –SERVICE_CIDR parameters to the Container Deployment Foundation (CDF) installation portal.
#Docker for mac kubernetes nfs volume install#
If you need to install a new copy of Docker for Mac you can download it from the Docker Store.
#Docker for mac kubernetes nfs volume windows#
Understanding Kubernetes Network Subnet Settings First, a few things to keep in mind: Docker for Mac required Kubernetes features are only accessible on macOS for now Docker for Windows and Docker Enterprise Edition betas will follow at a later date.
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