# Netplan Apply Moves Cluster To Pending State

## Problem

Every instance of applying Netplan moves the cluster to a *pending* state, irrespective of any actual changes made in the Netplan or not.

## Environment

* Platform9 Managed Kubernetes - v4.4
* Keepalived

## Cause

In a multi-master cluster, applying Netplan causes the ***systemd*** networking stack to restart, following which the Virtual IP (VIP) attached to the *active* master is impacted.

Typically, in a multi-master scenario, the ***keepalived*** service must move the VIP onto a different master in case of any crisis. However, due to [this](https://bugs.launchpad.net/ubuntu/+source/keepalived/+bug/1819074) upstream bug seen with ***keepalived***, upon applying Netplan, the VIP does not move to another master. Instead, the master in question is *still* retained as the active master, however with no attached VIP visible. Eventually, the connection between the active master and the worker nodes is hampered, thereby throwing the cluster into a pending state.

## Resolution

Perform the following steps on one master at a time as a workaround.

1\. Apply the Netplan after making your configurations

{% tabs %}
{% tab title="None" %}

```none
$ netplan apply
```

{% endtab %}
{% endtabs %}

2\. \[wait for a couple of minutes]

3\. Restart ***keepalived*** service

{% tabs %}
{% tab title="None" %}

```none
$ systemctl restart keepalived
```

{% endtab %}
{% endtabs %}

Each instance of restarting ***keepalived*** will transfer the VIP to another master.

Finally, perform the following step on worker nodes.

1\. Apply the Netplan

{% tabs %}
{% tab title="None" %}

```none
$ netplan apply
```

{% endtab %}
{% endtabs %}


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