ipsec: modified ipsec user guide, update kmeshctl-secret.md #226
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Signed-off-by: aicee <[email protected]>
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Summary of Changes
Hello @zrggw, 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!
This pull request updates the IPsec user guide within the Kmesh documentation, specifically revamping the kmeshctl-secret.md file. The changes aim to provide a comprehensive guide on enabling and managing IPsec for inter-node communication in a Kmesh cluster, addressing feedback from a previous review and resubmitting content that was initially based on an outdated branch.
Highlights
- Comprehensive IPsec Guide: The
kmeshctl-secret.mdfile has been transformed into a detailed user guide for implementing IPsec in Kmesh clusters. - Step-by-Step Configuration: New sections outline the process of generating IPsec pre-shared keys, configuring Kmesh YAML, and labeling namespaces for Kmesh management.
- Verification and Key Rotation: Instructions are provided for testing IPsec encryption using
tcpdumpand for replacing pre-shared keys. - Important Considerations: Added notes highlight potential conflicts with IPsec marks and issues with
address MASQwhen using IPsec.
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Code Review
This pull request updates the IPsec user guide, replacing the old kmeshctl secret documentation with a more comprehensive guide on enabling IPsec in a Kmesh cluster. The new guide is well-structured and provides step-by-step instructions. I've provided a few suggestions to improve clarity, fix a misleading example, and correct some minor formatting and wording issues to make the documentation even more helpful for users.
| -h, --help help for secret | ||
| -k, --key string key of the encryption | ||
| ``` bash | ||
| kmeshctl secret --key=$(echo -n "{36-bytes user-defined key here}" | xxd -p -c 64) |
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The example command for using a custom key is misleading. The placeholder string "{36-bytes user-defined key here}" is not 36 bytes long, which is the required length for the key. This could cause users to generate an invalid key. Please provide an example with a string that is exactly 36 bytes long to avoid confusion.
| kmeshctl secret --key=$(echo -n "{36-bytes user-defined key here}" | xxd -p -c 64) | |
| kmeshctl secret --key=$(echo -n 'a-36-byte-long-secret-key-for-ipsec' | xxd -p -c 64) |
| kmesh.yaml | ||
| ... | ||
| args: | ||
| [ | ||
| "./start_kmesh.sh --mode=dual-engine --enable-bypass=false --enable-ipsec=true", | ||
| ] | ||
| ... |
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The YAML example has unusual formatting for the list under args. The indentation of the brackets [ and ] is incorrect, which could confuse users. Using the standard block-style sequence for YAML lists is more common and readable.
| kmesh.yaml | |
| ... | |
| args: | |
| [ | |
| "./start_kmesh.sh --mode=dual-engine --enable-bypass=false --enable-ipsec=true", | |
| ] | |
| ... | |
| kmesh.yaml | |
| ... | |
| args: | |
| - "./start_kmesh.sh --mode=dual-engine --enable-bypass=false --enable-ipsec=true" | |
| ... |
| ... | ||
| ``` | ||
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| #### Step 5: Replace pre shared key |
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For better readability and convention, "pre shared key" should be hyphenated.
| #### Step 5: Replace pre shared key | |
| #### Step 5: Replace pre-shared key |
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| #### Step 5: Replace pre shared key | ||
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| After a period of time, the pre-shared key of the cluster can be changed. After changing the pre-shared key, the ESP SPI number of the IPsec used for communication between nodes will be increased by 1 compared to the previous version. This can be observed again through using tcpdump. The initial IPSec SPI version number is 1 |
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This sentence can be made more concise and consistent with the casing of "IPsec" used elsewhere in the document.
| After a period of time, the pre-shared key of the cluster can be changed. After changing the pre-shared key, the ESP SPI number of the IPsec used for communication between nodes will be increased by 1 compared to the previous version. This can be observed again through using tcpdump. The initial IPSec SPI version number is 1 | |
| After a period of time, the pre-shared key of the cluster can be changed. After changing the pre-shared key, the ESP SPI number of the IPsec used for communication between nodes will be increased by 1 compared to the previous version. This can be observed again through using tcpdump. The initial IPsec SPI is 1. |
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| ### Note | ||
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| 1. IPsec encryption uses mark `0xe0` and `0xd0` as markers for IPsec encryption and decryption. Please ensure that no conflicting Mark is used on the host network, otherwise unknown behavior may occur |
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Minor wording improvements for clarity: "Mark" should be lowercase, and the phrasing about "unknown behavior" can be more direct.
| 1. IPsec encryption uses mark `0xe0` and `0xd0` as markers for IPsec encryption and decryption. Please ensure that no conflicting Mark is used on the host network, otherwise unknown behavior may occur | |
| 1. IPsec encryption uses mark `0xe0` and `0xd0` as markers for IPsec encryption and decryption. Please ensure that no conflicting mark is used on the host network, as this may cause unexpected behavior. |
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| 1. IPsec encryption uses mark `0xe0` and `0xd0` as markers for IPsec encryption and decryption. Please ensure that no conflicting Mark is used on the host network, otherwise unknown behavior may occur | ||
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| 2. Please ensure that `address MASQ` is not used on packets encrypted with IPsec. After address MASQ, IPsec cannot accurately match encryption and decryption rules, which can result in packet loss |
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The term address MASQ might be unclear to some users. It would be helpful to clarify that this refers to address masquerading (like SNAT). Also, the sentence can be rephrased for better flow.
| 2. Please ensure that `address MASQ` is not used on packets encrypted with IPsec. After address MASQ, IPsec cannot accurately match encryption and decryption rules, which can result in packet loss | |
| 2. Please ensure that address masquerading (e.g., SNAT) is not used on packets encrypted with IPsec. If address masquerading is applied, IPsec cannot accurately match encryption and decryption rules, which can result in packet loss. |
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/approve |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: hzxuzhonghu The full list of commands accepted by this bot can be found here. The pull request process is described here
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/lgtm |
modified ipsec user guide according to the review of PR #105
The PR submitted earlier (#210) was based on an outdated main branch. Therefore, it has been resubmitted on the new main branch.