This post is just combining the information from Ubuntu 16.04 Root on ZFS and Encrypted ZFS Ubuntu Installation. First, start up your target machine using an Ubuntu Live ISO. When you’ll see the desktop, just press Ctrl + Alt + F1 and login with ubuntu and blank password. Let’s prepare the system for SSH, as things are much easier there. You can also skip this and do things locally, of course. Prepare SSH passwd sudo su systemctl stop lightdm # save some precious memory ;) apt update apt install openssh-server -y Now we can connect to the target machine via SSH. Read more

Today i was stumbling upon ZFS in Docker Docs. The ZFS on Linux (ZoL) port is healthy and maturing. However, at this point in time it is not recommended to use the zfs Docker storage driver for production use unless you have substantial experience with ZFS on Linux. I do have, so let’s try things out. I’m not installting any Ubuntu ZFS thingy, just grabbed one of my lab Proxmox installations with ZFS builtin. In this test, there was no running Docker daemon before the next steps. If you already are running Docker, you should stop the service, rename (or delete) /var/lib/docker and continue. Read more

Introduction Besides many existing tools, i’ve discovered znapzend to be a very powerful tool to manage automatic snapshots including retention and cleanup for time bases snapshot plans. I’m using it with the Proxmox builtin ZFS on Linux to create snaphots and copy them to local and remote disks. This allows me to build some pseudo HA cluster without maintaining things like Ceph as i have the VM filesystems available on other machines. Read more

To allow Check_MK to inventorize and fetch data for the zfs_arc_cache plugin, just create a file like /usr/lib/check_mk_agent/plugins/zfs_arc_cache with the content from below and make it executable. #!/bin/sh echo "<<<zfs_arc_cache>>>" cat /proc/spl/kstat/zfs/arcstats | tail -n +3 | awk '{print $1" = "$NF}' You then should get some nice graphs showing all the stats.

Recently, i was trying to setup a SAMBA4 domain controller inside a LXC VM on Proxmox using ZFS. Kind a lot of fancy buzzwords and acronyms ;) However, domain provision failed due to missing acl flag on filesystem: Realm [LAN]: LAN.EXAMPLE.COM Domain [LAN]: Server Role (dc, member, standalone) [dc]: DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: DNS forwarder IP address (write 'none' to disable forwarding) [1.2.3.4]: Administrator password: Retype password: Looking up IPv4 addresses Looking up IPv6 addresses No IPv6 address will be assigned Setting up share.ldb Setting up secrets.ldb Setting up the registry Setting up the privileges database Setting up idmap db Setting up SAM db Setting up sam.ldb partitions and settings Setting up sam.ldb rootDSE Pre-loading the Samba 4 and AD schema Adding DomainDN: DC=lan,DC=example,DC=com Adding configuration container Setting up sam.ldb schema Setting up sam.ldb configuration data Setting up display specifiers Modifying display specifiers Adding users container Modifying users container Adding computers container Modifying computers container Setting up sam.ldb data Setting up well known security principals Setting up sam.ldb users and groups Setting up self join ERROR(<class 'samba.provision.ProvisioningError'>): Provision failed - ProvisioningError: Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option. File "/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/domain.py", line 442, in run nosync=ldap_backend_nosync, ldap_dryrun_mode=ldap_dryrun_mode) File "/usr/local/samba/lib/python2.7/site-packages/samba/provision/__init__.py", line 2172, in provision skip_sysvolacl=skip_sysvolacl) File "/usr/local/samba/lib/python2.7/site-packages/samba/provision/__init__.py", line 1806, in provision_fill names.domaindn, lp, use_ntvfs) File "/usr/local/samba/lib/python2.7/site-packages/samba/provision/__init__.py", line 1558, in setsysvolacl raise ProvisioningError("Your filesystem or build does not support posix ACLs, which s3fs requires. " Seems legit: Read more