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update upgrade checklist and upgrade docs for systemd

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Minio Trusted 2022-05-19 11:20:59 -07:00
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README.md
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@ -244,13 +244,13 @@ mc admin update <minio alias, e.g., myminio>
- For deployments without external internet access (e.g. airgapped environments), download the binary from <https://dl.min.io> and replace the existing MinIO binary let's say for example `/opt/bin/minio`, apply executable permissions `chmod +x /opt/bin/minio` and do `mc admin service restart alias/`.
- For RPM/DEB installations, upgrade packages **parallelly** on all servers. Once upgraded, perform `systemctl restart minio` across all nodes in **parallel**. RPM/DEB based installations are usually automated using [`ansible`](https://github.com/minio/ansible-minio).
- For installations using Systemd MinIO service, upgrade via RPM/DEB packages **parallelly** on all servers or replace the binary lets say `/opt/bin/minio` on all nodes, apply executable permissions `chmod +x /opt/bin/minio`. Proceed to perform `systemctl restart minio` across all nodes in **parallel**.
### Upgrade Checklist
- Test all upgrades in a lower environment (DEV, QA, UAT) before applying to production. Performing blind upgrades in production environments carries significant risk.
- Read the release notes for the targeted MinIO release *before* performing any installation, there is no forced requirement to upgrade to latest releases every week. If it has a bug fix you are looking for then yes, else avoid actively upgrading a running production system.
- Make sure MinIO process has write access to `/opt/bin` if you plan to use `mc admin update`. This is needed for MinIO to download the latest binary from <https://dl.min.io> and save it locally for upgrades.
- If you plan to use `mc admin update`, MinIO process must have write access to the parent directory to provide in-place upgrades.
- `mc admin update` is not supported in kubernetes/container environments, container environments provide their own mechanisms for container updates.
- **We do not recommend upgrading one MinIO server at a time, the product is designed to support parallel upgrades please follow our recommended guidelines.**