ZSTOR and QSFS understood and well documented for use in VM

[despiegk]

purpose

• know what it can do and not today
• get it usable & documented for in VM use case
• make good deployers for it

TODO

• [ ] link to the repo's and milestones of what needs to be done
• [ ] mention deadline

[xmonader]

current docs https://github.com/threefoldfoundation/fediverse/blob/main/docs/qsfs_manual_setup.md

[LeeSmet]

Basic documentation

QSFS documentation: https://github.com/threefoldtech/quantum-storage. The README contains an overview of the components and links to the individual components repo's. All of these contain build and usage instructions. Next to this, the repo also contains a bootstrap tool in V to get a working system up and running by downloading pre build binaries on linux: https://github.com/threefoldtech/quantum-storage/tree/master/bootstrap. This can also be fed a config file to work with existing 0-db's.

VM use case

Not really sure what is meant here, either set up a system inside a VM, or attach a QSFS as mountpoint from zos to a VM.

• Inside VM: this is the same as any linux system. As mentioned above, all repos contain pre build binaries and detailed instructions, and there are packagers available:

  • V: https://github.com/threefoldtech/quantum-storage/tree/master/bootstrap
  • Nixos package: https://github.com/threefoldtech/0-stor_v2/issues/102

• As mounted filesystem inside a zos VM: Zos supports creating of a QSFS container, which can then be mounted to a VM on the node. As long as the same config is used to create the QSFS, it is moveable to other nodes (though users should take care to only have 1 system active at all times to avoid corruption). Documentation:

  • Terraform: example deployment file: https://github.com/threefoldtech/terraform-provider-grid/blob/development/examples/resources/qsfs/main.tf and explanation of the config options: https://github.com/threefoldtech/terraform-provider-grid/blob/development/docs/resources/deployment.md#nested-schema-for-qsfs

Required work

• Proper stability testing of repair functionality https://github.com/threefoldtech/home/issues/1101
• Remove V2 explorer support https://github.com/threefoldtech/0-stor_v2/issues/106
• Investigate behavior when FS is full when mounted in 0-os: https://github.com/threefoldtech/quantum-storage/issues/30
• 0-stor documentation: https://github.com/threefoldtech/0-stor_v2/issues/96
  • cmd line usage: https://github.com/threefoldtech/0-stor_v2/issues/100
  • monitoring: https://github.com/threefoldtech/0-stor_v2/issues/97

[sabrinasadik]

Seems like documentation about disk quota is not good enough, see multiple questions on forum

• https://forum.threefold.io/t/qsfs-mount-point-is-unusable-when-file-size-is-higher-than-storage-capacity/2337
• https://forum.threefold.io/t/how-to-access-deployed-qsfs/3311
• https://forum.threefold.io/t/disk-quota-exceeded/3319

[LeeSmet]

https://forum.threefold.io/t/qsfs-mount-point-is-unusable-when-file-size-is-higher-than-storage-capacity/2337

https://github.com/threefoldtech/quantum-storage/issues/19, there is some suspicion this is a 0-db-fs issue taking down one of the components in the system

https://forum.threefold.io/t/how-to-access-deployed-qsfs/3311

Reading through the discussion this seems answered?

https://forum.threefold.io/t/disk-quota-exceeded/3319

Also seems anwered, also the issue is not specific to qsfs, but rather to using "micro VM's" in general, and should be covered there in a section of the documentation (specifically, this kind of VM is not intended to write additional data, and doing so requires increasing the rootfs_size)

[robvanmieghem]

Rewrote the quantum storage readme https://github.com/threefoldtech/quantum-storage/tree/master There are docs for a manual setup, a troubleshooting and operations guide. The docker image is now also published and has documentation.

[robvanmieghem]

Quantum storage docs in the repo itself: entry readme: https://github.com/threefoldtech/quantum-storage/blob/master/README.md At the bottom there are links to other docs( like how to set it up manually and operations): https://github.com/threefoldtech/quantum-storage/blob/master/README.md#other-documentation

[xmonader]

When can this be closed? @robvanmieghem @sabrinasadik ?