changing acces vlan for all the OSDs - potential downtime ?
Hi all, I have a Ceph cluster with a standard setup : - the public network : MONs and OSDs conected in the same agg switch with ports in the same access vlan - private network : OSDs connected in another switch with a second eth connected in another access vlan I need to change the public vlan on the first switch and the private vlan and the second switch. Although it should be a trivial operation (just change the vlan range ports in a single command), it means that all the OSDs and MONs will not be able to communicate with each other for a few seconds . (first on the public network, then on the private network). Do you know if this very short period of downtime will mess up the cluster somehow ? Is there a best practice on how to do this safely ? Thank you , Adrian.
On 6/4/20 4:26 PM, Adrian Nicolae wrote:
Hi all,
I have a Ceph cluster with a standard setup :
- the public network : MONs and OSDs conected in the same agg switch with ports in the same access vlan
- private network : OSDs connected in another switch with a second eth connected in another access vlan
I need to change the public vlan on the first switch and the private vlan and the second switch.
Although it should be a trivial operation (just change the vlan range ports in a single command), it means that all the OSDs and MONs will not be able to communicate with each other for a few seconds . (first on the public network, then on the private network). Do you know if this very short period of downtime will mess up the cluster somehow ? Is there a best practice on how to do this safely ?
`ceph osd set noout` is enough for this, I think. k
I would add as well: ceph osd set norecover Stan Lea ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, June 5, 2020 1:03 AM, Konstantin Shalygin <k0ste@k0ste.ru> wrote:
On 6/4/20 4:26 PM, Adrian Nicolae wrote:
Hi all, I have a Ceph cluster with a standard setup :
- the public network : MONs and OSDs conected in the same agg switch with ports in the same access vlan
- private network : OSDs connected in another switch with a second eth connected in another access vlan
I need to change the public vlan on the first switch and the private vlan and the second switch. Although it should be a trivial operation (just change the vlan range ports in a single command), it means that all the OSDs and MONs will not be able to communicate with each other for a few seconds . (first on the public network, then on the private network). Do you know if this very short period of downtime will mess up the cluster somehow ? Is there a best practice on how to do this safely ?
`ceph osd set noout` is enough for this, I think.
k
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participants (3)
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Adrian Nicolae
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Konstantin Shalygin
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Stan Lea