| Guest5035 | had an issue today trying to understand: ami amazon/amzn2-ami-minimal-hvm-2.0.20220207.1-x86_64-ebs cloud init ran a user data script as expected, with a newer ami amzn2-ami-minimal-hvm-2.0.20220218.0-x86_64-ebs it did not work - I found a cat /var/lib/cloud/instance/user-data.txt.i which looked like: | 19:59 |
|---|---|---|
| Guest5035 | Content-Type: multipart/mixed; boundary="===============2079083206506282502==" | 19:59 |
| Guest5035 | MIME-Version: 1.0 | 19:59 |
| Guest5035 | Number-Attachments: 1 | 19:59 |
| Guest5035 | Number-Attachments: 1 | 19:59 |
| Guest5035 | --===============2079083206506282502== | 19:59 |
| Guest5035 | MIME-Version: 1.0 | 19:59 |
| Guest5035 | Content-Type: text/x-not-multipart | 19:59 |
| Guest5035 | Content-Disposition: attachment; filename="part-001" | 19:59 |
| Guest5035 | --===============2079083206506282502==-- | 19:59 |
| Guest5035 | any ideas? | 20:00 |
| guest007 | ? | 20:09 |
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| toolsmith | hello all. I just started using cloud-init through terraform for Azure. In poc mode right now and passing 64bitencoded shell file with template: jinja declaration. I can get basic jinja working but when trying to us the jinja 'do' statement I'm getting python stack trace. TemplateSyntaxError: Encountered unknown tag 'do'. Jinja was looking for the | 22:52 |
| toolsmith | following tags: 'endfor' or 'else'. The innermost block that needs to be closed is 'for'. The do statement is nested within a for statement like so.......{% set private_ips = [] %} {% for i in ds.meta_data.imds.network.interface[0].ipv4 %} {% do private_ips.append(i.privateIpAddress) %} {% endfor %} | 22:52 |
| toolsmith | Is this possible in user-data processing? | 22:54 |
| blackboxsw | toolsmith: can you paste the "fullish" user-data to paste.ubuntu.com or https://paste.opendev.org/ ? | 22:55 |
| toolsmith | blackboxsw pasted, Paste #b9ydAg0GtZV8GRWvc5Vp | 22:57 |
| blackboxsw | toolsmith: thanks. trying to peek at it now and execise in a LXD. we should be able to iterate on this a bit locally using cloud-init cmdline of your azure instance with something like the following `sudo cloud-init query --format '{% ... your template syntax %}' . I'm playing with something like your example now | 23:01 |
| toolsmith | ok, i'll see about running the cli tool on my instance as well | 23:02 |
| blackboxsw | for instance we can easily just construct a simple for loop and render the content of a list w/ `cloud-init query --format "{% set private_ips = [1, 2, 3] %} {% for i in private_ips %} {{ i }} {% endfor %}"` | 23:02 |
| toolsmith | yeah, it's the 'do' statement that is not being honored it seems. | 23:03 |
| blackboxsw | but yeah, I'm trying to understand your 'do' operations. I think we don't need/want the "do" but I'm checking | 23:03 |
| toolsmith | My experience with jinja has been mostly with Saltstack and this is something I did in salt states all the time, so i figured i see if it's possible in cloud-init. | 23:04 |
| toolsmith | A pattern i use is 1. set empty array var 2. iterate some runtime data 3. append to the array 4. dump the array to a file or process some more. | 23:05 |
| toolsmith | At least that is how I had to do it within Saltstack states | 23:06 |
| blackboxsw | this seems to work for me to extend the list iteself, but it still emits the None return value for each iteration in the loop. cloud-init query --format "{% set private_ips = [1, 2, 3] %} {% for i in private_ips %} {{ i }} {% endfor %}" | 23:11 |
| blackboxsw | wrong paste. sorry | 23:11 |
| blackboxsw | here: cloud-init query --format "{% set private_ips = [] %} {% for i in [1, 2, 3] %} {{ private_ips.append(i) }} {% endfor %} {{private_ips }}" | 23:12 |
| blackboxsw | for some reason if I just use {% private_ips.append(i) %} around the operation we'll get that "Encountered unknown tag 'private_ips'... expected "endfor" etc | 23:13 |
| toolsmith | yup, i get the same. | 23:15 |
| toolsmith | Thanks for the tip on cli query too ;-), that will save me time | 23:15 |
| blackboxsw | could mangle it a bit more with a jinja default() like so: cloud-init query --format "{% set private_ips = [] %} {% for i in [1, 2, 3] %} {{ private_ips.append(i) }} {% endfor %} {{private_ips }}" | 23:19 |
| blackboxsw | anyhow I'm going to have to head out here, sorry just lobbing weak suggestions your way | 23:20 |
| blackboxsw | cloud-init query --format "{% set private_ips = [] %} {% for i in [1, 2, 3] %}{{ private_ips.append(i)|default('', True)}}{% endfor %} {{private_ips }}" | 23:20 |
| toolsmith | no problem. thanks for helping out. | 23:21 |
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