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Update upgrade.md 

incorporated the last of @mark-church's fixes.
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Anne Henmi 2018-11-01 14:27:56 -06:00 committed by GitHub
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@ -36,7 +36,7 @@ To prevent this from happening, overlay networks should have enough capacity pri
## Cluster Upgrade Best Practices
Docker Engine upgrades in Swarm clusters should follow these guidelines in order to avoid exhaustion application downtime.
* Workloads should not be actively scheduled in the cluster during upgrades. Large version mismatches between managers and workers can cause unintended consequences
* New workloads should not be actively scheduled in the cluster during upgrades. Large version mismatches between managers and workers can cause unintended consequences when new workloads are scheduled.
* Manager nodes should all be upgraded first before upgrading worker nodes. Upgrading manager nodes sequentially is recommended if live workloads in the cluster during the upgrade.
* Once manager nodes are upgraded worker nodes should be upgraded next and then the Swarm cluster upgrade is complete.
* If running UCP, the UCP upgrade should follow once all of the Swarm engines have been upgraded.
@ -216,14 +216,11 @@ listed below:
* [Oracle Linux](/install/linux/docker-ee/oracle.md#upgrade-docker-ee)
* [SLES](/install/linux/docker-ee/suse.md#upgrade-docker-ee)
### Make the node active
### Post-Upgrade Steps
Once you finish upgrading the node, make it available to run workloads. For
this, run:
```
docker node update --availability active <node>
```
After all manager and worker nodes have been upgrades, the Swarm cluster can be used again to schedule new
workloads. If workloads were previously scheduled off of the managers, they can be rescheduled again.
If any worker nodes were drained, they can be undrained again by setting `--availability active`.
## Upgrade UCP