add dad e2e #5146
add dad e2e #5146
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Hello @changluyi, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
Summary of Changes
This pull request adds a new end-to-end test case to verify IPv6 connectivity to node IPs when a pod starts immediately. It also includes changes to the daemon to wait for IPv6 addresses to reach a preferred state before proceeding with further configuration. Specifically, the changes in pkg/daemon/ovs_linux.go ensure that the system waits for IPv6 addresses to become preferred, checking for deprecated, DAD failed, or tentative states. The new test case in test/e2e/kube-ovn/underlay/underlay.go creates a pod that pings the IPv6 address of a node and verifies that the pod reaches a running state, indicating successful connectivity.
Highlights
- IPv6 DAD Check: The pull request introduces a mechanism to check the state of IPv6 addresses, ensuring they are in a preferred state (not deprecated, DAD failed, or tentative) before proceeding with network configuration.
- New E2E Test: A new end-to-end test case is added to verify IPv6 connectivity to node IPs when a pod starts immediately.
- Daemon Changes: The daemon is modified to include a function
waitIPv6AddressPreferredthat waits for IPv6 addresses to become preferred before continuing with the configuration.
Changelog
- pkg/daemon/ovs_linux.go
- Added a check for IPv6 address preferred state before proceeding with network configuration.
- Introduced the
waitIPv6AddressPreferredfunction to wait for IPv6 addresses to become preferred. - Removed the redundant IPv6 DAD check that was previously performed after gateway check.
- test/e2e/kube-ovn/underlay/underlay.go
- Added a new end-to-end test case to verify IPv6 connectivity to node IPs when a pod starts immediately.
- The test creates a provider network, VLAN, and subnet with IPv6 enabled.
- The test then creates a pod that pings the IPv6 address of a node and verifies that the pod reaches a running state.
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IPv6 takes its time,
DAD must pass, a crucial climb,
Preferred state we seek,
For packets to speak,
Connectivity, in its prime.
Footnotes
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Code Review
The pull request introduces IPv6 DAD (Duplicate Address Detection) checks and improves IPv6 address handling. It also adds an end-to-end test to verify IPv6 connectivity. The changes are well-structured and address an important aspect of IPv6 networking.
Summary of Findings
- Missing DAD check before gateway check: The original code performed a DAD check after the gateway check, which is not ideal. The DAD check should be performed before any network operations that rely on the IPv6 address being valid and unique. This change moves the DAD check to before the gateway check, ensuring that the IPv6 address is valid before proceeding with gateway readiness checks.
- IPv6 address state verification: The code now includes a function
waitIPv6AddressPreferredthat verifies the state of IPv6 addresses on an interface. This function checks for deprecated, DAD failed, or tentative addresses, ensuring that only preferred addresses are used. This adds robustness to IPv6 networking configurations. - E2E test for IPv6 connectivity: An end-to-end test has been added to verify IPv6 connectivity to node IPs when a pod starts immediately. This test ensures that IPv6 networking is functioning correctly in the cluster.
Merge Readiness
The pull request is almost ready for merging. The changes address an important aspect of IPv6 networking and include a new end-to-end test. I am unable to approve this pull request, and recommend that others review and approve this code before merging. There are no critical or high severity issues, but I recommend addressing the medium severity issue before merging.
Pull Request Test Coverage Report for Build 14482711274Details
💛 - Coveralls |
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Signed-off-by: clyi <[email protected]>
Pull Request
What type of this PR
Examples of user facing changes:
Which issue(s) this PR fixes
Fixes #(issue-number)