azure cli trigger failover geo-location cache redis

Question

I have created two Premium Azure Cache for Redis resources and set up geo replication. There is a button in the portal to failover manually.

How can I trigger this failover with Azure CLI?

I tried the az redis force-reboot --resource-group $resourceGroupName --name $redisPrimary --reboot-type $rebootType command to no avail.

Answer 1

I did it in PowerShell by breaking the (geo-replication) link between de caches and then re-creating it, making sure to reverse the primary and secondary cache.

Use the provisioning state to monitor the state after deleting or creating the link:

$provisioningState = (Get-AzRedisCache -Name $cacheNamePrimary).ProvisioningState

if ($provisioningState -eq 'Succeeded') { etc.. }

One gotcha, after removing the link Remove-AzRedisCacheLink and trying to create a new one New-AzRedisCacheLink, an error might occur even though the provisioning state will report 'Succeeded'. Error message: Operation returned an invalid status code 'Conflict'.

In this case I created a while loop that breaks when the New-AzRedisCacheLink returns no error:

# Create cache link (geo-replication)
while ($true) {
    $provisioningState = (Get-AzRedisCache -Name $cacheNamePrimary).ProvisioningState

    if ($provisioningState -eq 'Succeeded') {
        try {
            New-AzRedisCacheLink -PrimaryServerName $cacheNameSecondary -SecondaryServerName $cacheNamePrimary -ErrorAction Stop
            break
        } catch {
            Write-Output "Trying to creating cache link but received an error '$($_)'.. probably busy processing something.. retrying.."
            Start-Sleep -Milliseconds 20000
        }
    } else {
        Start-Sleep -Milliseconds 30000
        Write-Output "Still waiting for cache link to be removed.. provisioning status '$provisioningState'.."
    }
}