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DescriptionOyvind Albrigtsen
2020-12-08 14:27:49 UTC
Description of problem:
The 8.1.z (BZ 1822251) and 8.2.z (BZ 1822250) versions of the aws-vpc-move-ip resource agent delete routes (as part of ec2ip_get_and_configure()) **after** assigning the IP address to the interface. They're supposed to delete routes (as part of ec2ip_drop()) **before** assigning the IP address to the interface.
I have no idea how or why this is the case. The upstream history of the resource agent shows that the `ip route` commands have always been part of the ec2ip_drop() function since they were added:
- https://github.com/ClusterLabs/resource-agents/commit/390d1cb8
Furthermore, resource-agents-4.1.1-68.el8 (RHEL 8.3) contains the `ip route` calls in the correct location. (See BZ 1819021).
These are the lines:
# delete remaining route-entries if any
ip route show to exact ${OCF_RESKEY_ip}/32 dev $OCF_RESKEY_interface | xargs -r ip route delete
ip route show table local to exact ${OCF_RESKEY_ip}/32 dev $OCF_RESKEY_interface | xargs -r ip route delete
They're at the end of ec2ip_get_and_configure() when they should be (and are upstream) at the end of ec2ip_drop().
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Version-Release number of selected component (if applicable):
resource-agents-4.1.1-44.el8_2.6
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How reproducible:
Always
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Steps to Reproduce:
1. Create and start an aws-vpc-move-ip resource.
2. Run `ip route show table all`.
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Actual results:
There is no local route to the managed IP address after the start operation.
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Expected results:
There is a local route to the managed IP address after the start operation. For example:
$ ip route show table all | grep '10\.29\.255\.'
local 10.29.255.250 dev eth0 table local proto kernel scope host src 10.29.255.250
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Additional info:
I'm flagging this as a regression, because until those lines were added to the end of ec2ip_get_and_configure(), one must assume the routes were present at the end of the start operation.
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Potential workaround:
Configure an IPsrcaddr resource with proto=kernel table=local.