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# Introduction
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## What is Democratic-CSI?
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`Democratic-CSI` implements the `CSI` (Container Storage Interface) specifications providing storage for various container orchestration systems (_ie: Kubernetes, Nomad, OpenShift_).
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The current _focus_ is providing storage via iSCSI or NFS from ZFS-based storage systems, predominantly `TrueNAS / FreeNAS` and `ZoL on Ubuntu`.
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The current _drivers_ implement the depth and breadth of the `csi` specifications, so you have access to resizing, snapshots, clones, etc functionality.
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## What can Democratic-CSI offer?
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**Several implementations of `CSI` drivers**
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:arrow_forward: `freenas-nfs` (manages zfs datasets to share over nfs)
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:arrow_forward: `freenas-iscsi` (manages zfs zvols to share over iscsi)
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:arrow_forward: `freenas-smb` (manages zfs datasets to share over smb)
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:arrow_forward: `freenas-api-nfs` experimental use with SCALE only (manages zfs datasets to share over nfs)
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:arrow_forward: `freenas-api-iscsi` experimental use with SCALE only (manages zfs zvols to share over iscsi)
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:arrow_forward: `freenas-api-smb` experimental use with SCALE only (manages zfs datasets to share over smb)
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:arrow_forward: `zfs-generic-nfs` (works with any ZoL installation...ie: Ubuntu)
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:arrow_forward: `zfs-generic-iscsi` (works with any ZoL installation...ie: Ubuntu)
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:arrow_forward: `zfs-local-ephemeral-inline` (provisions node-local zfs datasets)
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:arrow_forward: `synology-iscsi` experimental (manages volumes to share over iscsi)
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:arrow_forward: `lustre-client` (crudely provisions storage using a shared lustre share/directory for all volumes)
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:arrow_forward: `nfs-client` (crudely provisions storage using a shared nfs share/directory for all volumes)
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:arrow_forward: `smb-client` (crudely provisions storage using a shared smb share/directory for all volumes)
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:arrow_forward: `node-manual` (allows connecting to manually created smb, nfs, lustre, and iscsi volumes, see sample PVs in the `examples` directory)
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**Development**
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:arrow_forward: Framework for developing `CSI` drivers
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If you have any interest in providing a `CSI` driver, simply open an issue to
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discuss. The project provides an extensive framework to build and making it
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relatively easy to implement new drivers.
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## Community Guides
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[Using TrueNAS to provide persistent storage for Kubernetes](https://jonathangazeley.com/2021/01/05/using-truenas-to-provide-persistent-storage-for-kubernetes/)
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[Migrating from `NFS-client-provisioner` to `democratic-CSI`](https://gist.github.com/admun/4372899f20421a947b7544e5fc9f9117)
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[Migrating between storage classes using `Velero`](https://gist.github.com/deefdragon/d58a4210622ff64088bd62a5d8a4e8cc)
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# Installation
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Predominantly 3 prerequisites are needed:
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- Nodes preperation (ie: Kubernetes cluster nodes)
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- Storage server preperation
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- Deployment of the driver into the cluster (`helm` chart provided with sample
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`values.yaml`)
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## :wrench: Node preperation
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Alright, you have chosen your driver. Let's start by configuring the prerequisites for your Node.
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You can choose to use either **NFS** or **iSCSI** or **both**.
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### NFS configuration
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---
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#### RHEL / CentOS
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```bash
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sudo yum install -y nfs-utils
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```
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#### Ubuntu / Debian
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```bash
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sudo apt-get install -y nfs-common
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```
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### iSCSI configuration
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---
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**RHEL / CentOS**
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Install the following system packages:
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```bash
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sudo yum install -y lsscsi iscsi-initiator-utils sg3_utils device-mapper-multipath
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```
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Enable multipathing:
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```bash
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sudo mpathconf --enable --with_multipathd y
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```
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Ensure that `iscsid` and `multipathd` are running:
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```bash
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sudo systemctl enable iscsid multipathd && sudo systemctl start iscsid multipathd
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```
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Start and enable iSCSI:
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```bash
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sudo systemctl enable iscsi && sudo systemctl start iscsi
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```
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**Ubuntu / Debian**
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Install the following system packages:
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```bash
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sudo apt-get install -y open-iscsi lsscsi sg3-utils multipath-tools scsitools
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```
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#### Multipathing
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`Multipath` is supported for the `iSCSI`-based drivers. Simply setup multipath to your liking and set multiple portals in the config as appropriate.
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_NOTE:_ If you are running Kubernetes with Rancher/RKE please see the following:
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[Support host iscsi simultaneously with kubelet iscsi (pvc)](https://github.com/rancher/rke/issues/1846>)
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Add the mutlipath configuration:
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```bash
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sudo tee /etc/multipath.conf <<-'EOF'
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defaults {
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user_friendly_names yes
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find_multipaths yes
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}
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EOF
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```
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Enable the `multipath-tools` service and restart to load the configuration:
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```bash
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sudo systemctl enable multipath-tools && sudo service multipath-tools restart
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```
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Ensure that `open-iscsi` and `multipath-tools` are enabled and running:
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```bash
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sudo systemctl status multipath-tools
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sudo systemctl enable open-iscsi.service
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sudo service open-iscsi start
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sudo systemctl status open-iscsi
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```
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### FreeNAS-SMB
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---
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If using with Windows based machines you may need to enable guest access (even
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if you are connecting with credentials)
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```powershell
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Set-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters AllowInsecureGuestAuth -Value 1 ; Restart-Service LanmanWorkstation -Force
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```
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### ZFS-local-ephemeral-inline
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---
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This `driver` provisions node-local ephemeral storage on a per-pod basis. Each node should have an identically named ZFS pool created and avaialble to the `driver`.
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_NOTE:_ This is _NOT_ the same thing as using the docker ZFS storage
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driver (although the same pool could be used). No other requirements are
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necessary. More regarding to this can be found here: [Pod Inline Volume Support](https://kubernetes-csi.github.io/docs/ephemeral-local-volumes.html)
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## :wrench: Storage server preperation
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Storage server preperation depends slightly on which `driver` you are using.
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The recommended version of FreeNAS / TrueNAS is 12.0-U2 or higher, however the driver should work
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with much older versions as well.
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### TrueNAS / FreeNAS (freenas-nfs, freenas-iscsi, freenas-smb, freenas-api-nfs, freenas-api-iscsi, freenas-api-smb)
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#### API without SSH
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---
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Configuration templates can be found [HERE](https://github.com/D1StrX/democratic-csi/blob/667354978e497fb4624d52e909609ca278e4bd25/examples/api-with-ssh)
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The various `freenas-api-*` drivers are currently EXPERIMENTAL and can only be used with SCALE 21.08+. Fundamentally these drivers remove the need for `ssh` connections and do all operations entirely with the TrueNAS api. With that in mind, any `ssh/shell/etc` requirements below can be safely ignored. Also note the following known issues:
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- [Additional middleware changes to support Democratic CSI use of native API](https://jira.ixsystems.com/browse/NAS-111870)
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- [TrueNAS Scale 21.08 - Could not log into all portals](https://github.com/democratic-csi/democratic-csi/issues/112)
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- [Pure api based truenas driver (ssh dependency removed)](https://github.com/democratic-csi/democratic-csi/issues/101)
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[Continue configuration](#Service-configuration)
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#### API with SSH
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---
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Configuration templates can be found [HERE](https://github.com/D1StrX/democratic-csi/blob/667354978e497fb4624d52e909609ca278e4bd25/examples/api-with-ssh)
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[Continue configuration](#Service-configuration)
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### Service configuration
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Ensure the following services are _configured_, _running_ and starting automatically:
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#### SSH configuration
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---
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- When creating a custom user (e.g., `CSI`):
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- Ensure `ZSH`, `BASH`, or `SH` is set as `shell`, `CSH` gives false errors due to quoting (also applicable when using `root`)
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- Ensure that user has passwordless `sudo` privileges:
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_NOTE:_ This could get reset by FreeNAS if you alter the user via the GUI later
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- On TrueNAS CORE 12.0-u3 or higher, open the Shell:
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```bash
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cli
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```
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After you enter the truenas cli and are at that prompt:
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```bash
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account user query select=id,username,uid,sudo_nopasswd
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```
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find the `id` of the user you want to update (note, this is distinct from the `uid`)
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```bash
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account user update id=<id> sudo=true
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```
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```bash
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account user update id=<id> sudo_nopasswd=true
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```
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(Optional) If you want to enable passwordless authentication via CLI:
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```bash
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account user update id=<id> password_disabled=true
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```
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Exit the CLI by pressing `ctrl-d`
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- On other versions add the user to the sudoers file:
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```bash
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visudo
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```
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```bash
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<username> ALL=(ALL) NOPASSWD:ALL
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```
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Confirm sudoers file is appropriate:
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```bash
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cat /usr/local/etc/sudoers
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```
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- `CSI` has a homefolder, this is used to store its SSH Public Key
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- Add the user to `wheel` or create/use a group that will be used for permissions later on
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#### **NFS configuration**
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---
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- Bind the network interface to the NFS service
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- It is recommended to use NFS 3
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#### **iSCSI configuration**
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---
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- Bind the network interface to the iSCSI service
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_NOTE:_ (Fixed in 12.0-U2+) when using the FreeNAS API concurrently, the `/etc/ctl.conf` file on the server can become invalid, some sample scripts are provided in the `contrib` directory to clean things up ie:
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Copy the script to the server and directly and run - `./ctld-config-watchdog-db.sh | logger -t ctld-config-watchdog-db.sh &`
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Please read the scripts and set the variables appropriate for your server.
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- Ensure you have pre\*emptively created portals, initatior groups, auths
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- Make note of the respective IDs (the true ID may not reflect what is
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visible in the UI)
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- IDs can be visible by clicking the the `Edit` link and finding the ID in the
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browser address bar
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- Optionally you may use the following to retrieve appropiate IDs:
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- `curl --header "Accept: application/json" --user root:<password> 'http(s)://<ip>/api/v2.0/iscsi/portal'`
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- `curl --header "Accept: application/json" --user root:<password> 'http(s)://<ip>/api/v2.0/iscsi/initiator'`
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- `curl --header "Accept: application/json" --user root:<password> 'http(s)://<ip>/api/v2.0/iscsi/auth'`
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### SMB configuration
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---
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- Bind the network interface to the SMB service
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### ZoL (zfs-generic-nfs, zfs-generic-iscsi)
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---
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Ensure ssh and zfs is installed on the nfs/iscsi server and that you have installed
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`targetcli`.
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```bash
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sudo yum install targetcli -y
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```
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```bash
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sudo apt-get -y install targetcli-fb
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```
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### Synology (synology-iscsi)
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---
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Ensure iSCSI Manager has been installed and is generally setup/configured.
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### :wrench: YAML Values configuration
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---
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Instruct `Democratic-CSI` to use `sudo` by uncommenting the following in your configuration template:
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```yaml
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zfs:
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cli:
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sudoEnabled: true
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```
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As you read at the [Storage server preperation](#wrench-storage-server-preperation), YAML configuration comes in two flavours. _With_ and _without_ API configuration.
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Starting with TrueNAS CORE 12 it is also possible to use an `apiKey` instead of the user/root password for the HTTP connection. The `apiKey` can be generated by clicking on the `Settings icon` -> `API Keys` -> `ADD`
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Issues to review:
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[ixsystems NAS-108519](https://jira.ixsystems.com/browse/NAS-108519)
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[ixsystems NAS-108520](https://jira.ixsystems.com/browse/NAS-108520)
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[ixsystems NAS-108521](https://jira.ixsystems.com/browse/NAS-108521)
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[ixsystems NAS-108522](https://jira.ixsystems.com/browse/NAS-108522)
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[ixsystems NAS-107219](https://jira.ixsystems.com/browse/NAS-107219)
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## :wrench: Helm Installation
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---
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Copy proper example Values file from the examples:
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[API without SSH](https://github.com/D1StrX/democratic-csi/blob/667354978e497fb4624d52e909609ca278e4bd25/examples/api-without-ssh)
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[API with SSH](https://github.com/D1StrX/democratic-csi/blob/667354978e497fb4624d52e909609ca278e4bd25/examples/api-with-ssh)
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Add the `Democratic-CSI` Helm repository:
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```bash
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helm search repo democratic-csi/
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```
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Update your Helm repository to get latest charts:
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```bash
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helm repo update
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```
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### Helm V3
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---
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Install `Democratic-CSI` with your configured values. Helm V3 requires that you `--create-namespace`
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```bash
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helm install zfs-nfs democratic-csi/democratic-csi --values truenas-isci.yaml --create-namespace democratic-csi
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```
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Update/Upgrade Values:
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```bash
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helm upgrade <name> democratic-csi/democratic-csi --values <freenas-*>.yaml --namespace <namespace>
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```
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### Helm V2
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---
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Install `Democratic-CSI` with your configured values.
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||||||
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```bash
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helm upgrade \
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--install \
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--values freenas-nfs.yaml \
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--namespace democratic-csi \
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zfs-nfs democratic-csi/democratic-csi
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||||||
|
```
|
||||||
|
|
||||||
|
### On non standard Kubelet paths
|
||||||
|
|
||||||
|
Some distrobutions, such as `minikube` and `microk8s` use a non-standard kubelet path. In such cases it is ecessary to provide a new kubelet host path, microk8s example below:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
microk8s helm upgrade \
|
||||||
|
--install \
|
||||||
|
--values freenas-nfs.yaml \
|
||||||
|
--set node.kubeletHostPath="/var/snap/microk8s/common/var/lib/kubelet" \
|
||||||
|
--namespace democratic-csi \
|
||||||
|
zfs-nfs democratic-csi/democratic-csi
|
||||||
|
```
|
||||||
|
|
||||||
|
- microk8s - `/var/snap/microk8s/common/var/lib/kubelet`
|
||||||
|
- pivotal - `/var/vcap/data/kubelet`
|
||||||
|
|
||||||
|
### OpenShift
|
||||||
|
|
||||||
|
`Democratic-CSI` generally works fine with openshift. Some special parameters
|
||||||
|
need to be set with helm (support added in chart version `0.6.1`):
|
||||||
|
|
||||||
|
_NOTE:_ for sure required
|
||||||
|
|
||||||
|
```bash
|
||||||
|
--set node.rbac.openshift.privileged=true
|
||||||
|
```
|
||||||
|
|
||||||
|
```bash
|
||||||
|
--set node.driver.localtimeHostPath=false
|
||||||
|
```
|
||||||
|
|
||||||
|
_NOTE:_ Unlikely, but in special circumstances may be required
|
||||||
|
|
||||||
|
```bash
|
||||||
|
--set controller.rbac.openshift.privileged=true
|
||||||
|
```
|
||||||
|
|
||||||
|
### **Nomad**
|
||||||
|
|
||||||
|
`Democratic-CSI` works with Nomad in a functioning but limted capacity. See the [Nomad docs](docs/nomad.md) for details.
|
||||||
|
|
||||||
|
## :wrench: **Multiple Deployments**
|
||||||
|
|
||||||
|
You may install multiple deployments of each/any driver. It requires the following:
|
||||||
|
|
||||||
|
- Use a new helm release name for each deployment
|
||||||
|
- Make sure you have a unique `csiDriver.name` in the values file
|
||||||
|
- Use unqiue names for your storage classes (per cluster)
|
||||||
|
- Use a unique parent dataset (ie: don't try to use the same parent across deployments or clusters)
|
||||||
|
|
||||||
|
## :wrench: **Snapshot Support**
|
||||||
|
|
||||||
|
[**External-snapshotter CRD**](https://github.com/kubernetes-csi/external-snapshotter/tree/master/client/config/crd)
|
||||||
|
Install beta (v1.17+) CRDs (one per cluster):
|
||||||
|
|
||||||
|
```bash
|
||||||
|
kubectl apply -f snapshot.storage.k8s.io_volumesnapshotclasses.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
```bash
|
||||||
|
kubectl apply -f snapshot.storage.k8s.io_volumesnapshotcontents.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
```bash
|
||||||
|
kubectl apply -f snapshot.storage.k8s.io_volumesnapshots.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
[**External-snapshotter Controller**](https://github.com/kubernetes-csi/external-snapshotter/tree/master/deploy/kubernetes/snapshot-controller)
|
||||||
|
Install snapshot controller (once per cluster):
|
||||||
|
Add `--namespace` references to your need.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
kubectl apply -f rbac-snapshot-controller.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
```bash
|
||||||
|
kubectl apply -f setup-snapshot-controller.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
Install `Democratic-CSI` with `volumeSnapshotClasses` appropriatly defined.
|
||||||
|
|
||||||
|
[Volume-snapshots](https://kubernetes.io/docs/concepts/storage/volume-snapshots/)
|
||||||
|
[External-snapshotter Usage](https://github.com/kubernetes-csi/external-snapshotter#usage)
|
||||||
|
[Democratic-CSI Issue](https://github.com/democratic-csi/democratic-csi/issues/129#issuecomment-961489810)
|
||||||
|
|
||||||
|
## :wrench: Migrating from freenas-provisioner and freenas-iscsi-provisioner
|
||||||
|
|
||||||
|
It is possible to migrate all volumes from the non-csi freenas provisioners
|
||||||
|
to `Democratic-CSI`.
|
||||||
|
|
||||||
|
Copy the `contrib/freenas-provisioner-to-democratic-csi.sh` script from the project to your workstation. Read the script in detail, and edit the variables
|
||||||
|
to your needs to start migrating!
|
||||||
|
|
||||||
|
# :trophy: **Sponsors**
|
||||||
|
|
||||||
|
A special shout out to the wonderful sponsors of this project!
|
||||||
|
|
||||||
|
[](http://ixsystems.com/)
|
||||||
|
|
||||||
|
## **Related**
|
||||||
|
|
||||||
|
[Freenas provisioner](https://github.com/nmaupu/freenas-provisioner)
|
||||||
|
[Freenas iSCSI provisioner](https://github.com/travisghansen/freenas-iscsi-provisioner)
|
||||||
|
[Welcome TrueNAS Core container storageprovider](https://datamattsson.tumblr.com/post/624751011659202560/welcome-truenas-core-container-storage-provider)
|
||||||
|
[Truenas CSI](https://github.com/dravanet/truenas-csi)
|
||||||
|
[Synology CSI](https://github.com/SynologyOpenSource/synology-csi)
|
||||||
Loading…
Reference in New Issue