3.0 KiB
3.0 KiB
title | weight |
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Quick Start | 1 |
Prepare:
- Get some SATA or NVMe SSDs with capacitors (server-grade drives). You can use desktop SSDs with lazy fsync, but prepare for inferior single-thread latency. Read more about capacitors [here]({{< ref "config/layout-cluster#immediate_commit" >}}).
- Get a fast network (at least 10 Gbit/s). Something like Mellanox ConnectX-4 with RoCEv2 is ideal.
- Disable CPU powersaving:
cpupower idle-set -D 0 && cpupower frequency-set -g performance
. - [Install Vitastor packages]({{< ref "installation/packages" >}}).
Configure monitors
On the monitor hosts:
- Edit variables at the top of
/usr/lib/vitastor/mon/make-units.sh
to desired values. - Create systemd units for the monitor and etcd:
/usr/lib/vitastor/mon/make-units.sh
- Start etcd and monitors:
systemctl start etcd vitastor-mon
Configure OSDs
- Put etcd_address and osd_network into
/etc/vitastor/vitastor.conf
. Example:{ "etcd_address": ["10.200.1.10:2379","10.200.1.11:2379","10.200.1.12:2379"], "osd_network": "10.200.1.0/24" }
- Initialize OSDs:
- Simplest, SSD-only:
/usr/lib/vitastor/mon/make-osd.sh /dev/disk/by-partuuid/XXX [/dev/disk/by-partuuid/YYY ...]
- Hybrid, HDD+SSD:
/usr/lib/vitastor/mon/make-osd-hybrid.js /dev/sda /dev/sdb ...
— pass all your devices (HDD and SSD) to this script — it will partition disks and initialize journals on its own. This script skips HDDs which are already partitioned so if you want to use non-empty disks for Vitastor you should first wipe them withwipefs -a
. SSDs with GPT partition table are not skipped, but some free unpartitioned space must be available because the script creates new partitions for journals.
- Simplest, SSD-only:
- You can change OSD configuration in units or in
vitastor.conf
. Check [Configuration Reference]({{< ref "config" >}}) for parameter descriptions. systemctl start vitastor.target
everywhere.- If all your drives have capacitors, create global configuration in etcd:
etcdctl --endpoints=... put /vitastor/config/global '{"immediate_commit":"all"}'
Create a pool
Create pool configuration in etcd:
etcdctl --endpoints=... put /vitastor/config/pools '{"1":{"name":"testpool",
"scheme":"replicated","pg_size":2,"pg_minsize":1,"pg_count":256,"failure_domain":"host"}}'
For jerasure pools the configuration should look like the following:
etcdctl --endpoints=... put /vitastor/config/pools '{"2":{"name":"ecpool",
"scheme":"jerasure","pg_size":4,"parity_chunks":2,"pg_minsize":2,"pg_count":256,"failure_domain":"host"}`
After you do this, one of the monitors will configure PGs and OSDs will start them.
You can check PG states with etcdctl --endpoints=... get --prefix /vitastor/pg/state
. All PGs should become 'active'.
Create an image
Use vitastor-cli ([read CLI documentation here]({{< ref "usage/cli" >}})):
vitastor-cli create -s 10G testimg
After that, you can run benchmarks or start QEMU manually with this image.