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Update upgrades.md

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Karol Chrapek 2018-09-13 15:50:42 +02:00
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@ -18,6 +18,11 @@ versions. Here are all version vars for each component:
* flannel_version
* kubedns_version
Please remember that some components upgrade depends on minimum installed version.
In example **calico version 2.6.5 upgrade to 3.1.1 is upgrading etcd store to etcdv3**.
The kubespray stack upgrade would failed when calico version is below 2.6.5. Please check
components' documentation and always upgrade test environment first.
#### Unsafe upgrade example
If you wanted to upgrade just kube_version from v1.4.3 to v1.4.6, you could