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