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Update /var/lib/etcd/wal directories

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Thanh Nhan Pham
2020-05-15 10:15:40 +07:00
committed by Catherine Luse
parent 978e1ed314
commit 2ff1675ef1
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content/rancher/v2.x/en/installation/options/etcd/_index.md
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@@ -25,7 +25,7 @@ You can follow the recommendations from [the etcd docs](https://etcd.io/docs/v3.
Additionally, to reduce IO contention on the disks for etcd, you can use a dedicated device for the data and wal directory. Based on etcd best practices, mirroring RAID configurations are unnecessary because etcd replicates data between the nodes in the cluster. You can use stripping RAID configurations to increase available IOPS.
To implement this solution in an RKE cluster, the `/var/lib/etcd/data` and `/var/lib/etc/wal` directories will need to have disks mounted and formatted on the underlying host. In the `extra_args` directive of the `etcd` service, you must include the `wal_dir` directory. Without specifying the `wal_dir`, etcd process will try to manipulate the underlying `wal` mount with insufficient permissions.
To implement this solution in an RKE cluster, the `/var/lib/etcd/data` and `/var/lib/etcd/wal` directories will need to have disks mounted and formatted on the underlying host. In the `extra_args` directive of the `etcd` service, you must include the `wal_dir` directory. Without specifying the `wal_dir`, etcd process will try to manipulate the underlying `wal` mount with insufficient permissions.
```yaml
# RKE cluster.yml