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I also noticed when I used “config-get” API, it would return a has value at the end. I compared both API outputs and they are the same.
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<div><span style="white-space: pre; color: rgb(163, 21, 21);">"hash"</span><span style="white-space: pre;">:
</span><font color="#0451a5"><span style="caret-color: rgb(4, 81, 165); white-space: pre;">“</span></font><span style="white-space: pre; color: rgb(4, 81, 165);">8CBF975...C36A513A.ADDFCD6E5980...6E"</span></div>
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<div style="white-space: pre;"><span style="color: rgb(163, 21, 21);">"result"</span>:
<span style="color: rgb(9, 134, 88);">0</span></div>
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<div>On May 13, 2025, at 2:34 AM, Diogo André de Assumpção <daa@meta.com> wrote:</div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">Yes, I did mean the config in /etc/kea. Getting the config with config-write seems to be the same as config-get, it returns the config with all the defaults, example:<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">From config-write:<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">{<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "Dhcp4": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "allocator": "iterative",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "authoritative": false,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "boot-file-name": "",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "calculate-tee-times": false,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "control-socket": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "socket-name": "/tmp/kea4-ctrl-socket",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "socket-type": "unix"<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> },<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-conflict-resolution-mode": "check-with-dhcid",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-generated-prefix": "myhost",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-override-client-update": false,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-override-no-update": false,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-qualifying-suffix": "",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-replace-client-name": "never",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-send-updates": true,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "ddns-update-on-renew": false,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">And /etc/kea/kea-dhcp4.conf<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><br>
{<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "Dhcp4": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "store-extended-info": true,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "interfaces-config": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "interfaces": [<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "eth0/192.168.1.1"<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> ]<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> },<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "control-socket": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "socket-type": "unix",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "socket-name": "/tmp/kea4-ctrl-socket"<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> },<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "lease-database": {<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "type": "memfile",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "name": "/tmp/kea-dhcp4.csv",<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "lfc-interval": 7200,<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> "persist": true<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> },<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><br>
<br>
<o:p></o:p></div>
<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><o:p> </o:p></div>
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<b><span style="">From:<span class="Apple-converted-space"> </span></span></b><span style=""><a href="mailto:tachibanashita@outlook.com" style="color: blue; text-decoration: underline;">tachibanashita@outlook.com</a><span class="Apple-converted-space"> </span><<a href="mailto:tachibanashita@outlook.com" style="color: blue; text-decoration: underline;">tachibanashita@outlook.com</a>><br>
<b>Date:<span class="Apple-converted-space"> </span></b>Monday, May 12, 2025 at 5:42</span><span style="font-family: Arial, sans-serif;"> </span><span style="">PM<br>
<b>To:<span class="Apple-converted-space"> </span></b>Kea user's list <<a href="mailto:kea-users@lists.isc.org" style="color: blue; text-decoration: underline;">kea-users@lists.isc.org</a>><br>
<b>Cc:<span class="Apple-converted-space"> </span></b>Diogo André de Assumpção <<a href="mailto:daa@meta.com" style="color: blue; text-decoration: underline;">daa@meta.com</a>><br>
<b>Subject:<span class="Apple-converted-space"> </span></b>Re: [Kea-users] config-hash-get – uses full config to hash?<o:p></o:p></span></p>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><span style="font-size: 1pt; color: white;">“Using the same config that I have loaded in the server” do you mean the config file in /etc/kea? If so, can you use the write-config API
to get the configuration in memory and compare it again? On May 12, 2025, at 2:</span><span style="font-size: 1pt; font-family: Arial, sans-serif; color: white;"> </span><span style="font-size: 1pt; color: white;">43 AM, Diogo André de Assumpção<o:p></o:p></span></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"><span style="font-size: 1pt; color: white;"><o:p></o:p></span></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">“Using the same config that I have loaded in the server” do you mean the config file in /etc/kea? If so, can you use the write-config API to get the configuration in memory and compare
it again? <o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">On May 12, 2025, at 2:43<span style="font-family: Arial, sans-serif;"> </span>AM, Diogo André de Assumpção via Kea-users <kea-users@lists.isc.org> wrote:<o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">Hi all,<span class="apple-converted-space"> </span><br>
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I was exploring using the `config-hash-get` command to get a hash of the loaded config and then compare with a candidate config to see if anything was change before loading.<br>
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Using the same config that I have loaded in the server, I couldn’t get a hash that matched the one we get via the `config-hash-get` command.<o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> <o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">Is that something in the way I’m generating the hash? I’m passing the entire dhcp4 config (ie. {"Dhcp4":…}) to the hash function.<o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;"> <o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">I also noticed that if I do a `config-get` command, the output will contain every optional field that is usually not present in a manually generated config. Could that be the reason
why the hashes don’t match?<br>
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Thanks,<o:p></o:p></div>
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<div style="margin: 0in; font-size: 12pt; font-family: Aptos, sans-serif;">– Diogo<o:p></o:p></div>
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