| darkblueb | hi all - new here.. some knowledge of networking and admin.. use linux daily | 14:54 |
|---|---|---|
| darkblueb | stumbled upon cloud-init while setting up a pair of VMs for a client (debian 10).. will read and tune a bit today.. no K8s | 14:55 |
| darkblueb | .. I see this, will start here .. https://readthedocs.org/projects/cloudinit/downloads/pdf/latest/ | 14:58 |
| falcojr | hey darkblueb, glad you're here. Feel free to ask any questions. And yes, the readthedocs cloud-init documentation is the best place to start | 15:01 |
| darkblueb | thx | 15:01 |
| Deckard111 | Hi, I am having problems installing postfix using cloud-init. | 15:38 |
| Deckard111 | on Ubuntu 20.04LTS | 15:38 |
| blackboxsw | Deckard111: what's your #cloud-config user-data look like? | 15:39 |
| Deckard111 | I think it is because of the interactive mode of the postfix package | 15:40 |
| Deckard111 | basically I want the package install with 'no configuration' option | 15:40 |
| Deckard111 | I tried setting: debconf-selections: | | 15:41 |
| Deckard111 | postfix postfix/main_mailer_type string 'No configuration' | 15:41 |
| Deckard111 | but it is being ignored, it seems | 15:41 |
| Deckard111 | log looks like this: | 15:42 |
| Deckard111 | Setting up postfix (3.4.13-0ubuntu1) ... | 15:42 |
| Deckard111 | Adding group `postfix' (GID 117) ... | 15:42 |
| Deckard111 | Done. | 15:42 |
| Deckard111 | Adding system user `postfix' (UID 111) ... | 15:42 |
| Deckard111 | Adding new user `postfix' (UID 111) with group `postfix' ... | 15:42 |
| Deckard111 | ERROR: ld.so: object 'libeatmydata.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored. | 15:42 |
| Deckard111 | Not creating home directory `/var/spool/postfix'. | 15:42 |
| Deckard111 | Creating /etc/postfix/dynamicmaps.cf | 15:42 |
| Deckard111 | Adding group `postdrop' (GID 118) ... | 15:42 |
| Deckard111 | Done. | 15:42 |
| Deckard111 | postconf: warning: valid_hostname: numeric hostname: 0 | 15:42 |
| Deckard111 | postconf: fatal: unable to use my own hostname | 15:42 |
| Deckard111 | postconf: warning: valid_hostname: numeric hostname: 0 | 15:42 |
| Deckard111 | postconf: fatal: unable to use my own hostname | 15:42 |
| Deckard111 | dpkg: error processing package postfix (--configure): | 15:42 |
| Deckard111 | installed postfix package post-installation script subprocess returned error exit status 1 | 15:42 |
| Deckard111 | @blackboxsw: There is no postfix user in user data, if that is what you are asking | 15:42 |
| Deckard111 | after cloud init finishes the postfix package is still stuck in unconfigured status in ap | 15:44 |
| Deckard111 | t | 15:44 |
| blackboxsw | I meant how are you telling cloud-init to install postfix with cloud-init userdata on the system `sudo cloudinit query userdata` on the system will tell us what you are providing as #cloud-config to setup/config postfix | 15:45 |
| Deckard111 | yes, it is a huge config with sensitive parts | 15:46 |
| blackboxsw | generally since postfix isn't installed I expected you probably have a #cloud-config\npackages: [postfix]\n | 15:46 |
| Deckard111 | postfix is in ther packages module | 15:46 |
| Deckard111 | packages: | 15:46 |
| Deckard111 | - postfix | 15:46 |
| blackboxsw | I see you mentioned " debconf-selections: | | 15:47 |
| blackboxsw | 09:41 postfix postfix/main_mailer_type string 'No configuration' | 15:47 |
| blackboxsw | from the docs https://cloudinit.readthedocs.io/en/latest/topics/modules.html?highlight=selections#apt-configure ... it seems you are missing a top level config key | 15:48 |
| Deckard111 | ah I see | 15:49 |
| Deckard111 | debconf-selections is a child of apt | 15:49 |
| Deckard111 | thanks, will check and test | 15:49 |
| blackboxsw | Deckard111: something like this maybe? https://paste.ubuntu.com/p/JG7FGPkHTz/ | 15:49 |
| Deckard111 | yes, thank you | 15:50 |
| blackboxsw | no worries thx for the question | 15:50 |
| Deckard111 | blackboxsw Would i see in the cloud-init log if this apt/debcon-selections key would be properly set? | 16:03 |
| Deckard111 | my config looks like this now: https://paste.ubuntu.com/p/PtXpccYJPQ/ but it would not work, yet | 16:05 |
| Deckard111 | found in log: | 16:06 |
| Deckard111 | 2021-07-02 15:55:52,889 - cc_grub_dpkg.py[DEBUG]: Setting grub debconf-set-selections with '/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0-0-0-0','false' | 16:07 |
| Deckard111 | 2021-07-02 15:55:52,889 - subp.py[DEBUG]: Running command ['debconf-set-selections'] with allowed return codes [0] (shell=False, capture=True) | 16:07 |
| Deckard111 | 2021-07-02 15:55:53,125 - handlers.py[DEBUG]: finish: modules-config/config-grub-dpkg: SUCCESS: config-grub-dpkg ran successfully | 16:07 |
| Deckard111 | still, postfix package did not fully install | 16:07 |
| blackboxsw | Deckard111: `debconf show postfix | grep mail` | 16:09 |
| blackboxsw | on my system with the pasted cloud-config from above I see this in logs | 16:10 |
| blackboxsw | 2021-07-02 16:06:57,809 - cc_apt_configure.py[DEBUG]: handling apt config: {'debconf_selections': {'set1': "postfix postfix/main_mailer_type string 'No configuration'"}} | 16:10 |
| Deckard111 | I see: | 16:11 |
| Deckard111 | 2021-07-02 15:55:53,129 - helpers.py[DEBUG]: Running config-apt-configure using lock (<FileLock using file '/var/lib/cloud/instances/12908318/sem/config_apt_configu> | 16:11 |
| Deckard111 | 2021-07-02 15:55:53,131 - cc_apt_configure.py[DEBUG]: debconf_selections was not set in config | 16:11 |
| Deckard111 | 2021-07-02 15:55:53,131 - cc_apt_configure.py[DEBUG]: handling apt config: {'debconf-selections': "postfix postfix/main_mailer_type string 'No configuration'\n"} | 16:11 |
| blackboxsw | so you are missing the "set1:" key | 16:12 |
| blackboxsw | debconf_selections in not a string but a dict | 16:12 |
| Deckard111 | ok,. thank you, will retry | 16:13 |
| blackboxsw | Deckard111: this will validate your userdata schema and I think may throw and error for you on invalid debconf_selections value type: sudo cloud-init devel schema --system --annotate | 16:14 |
| blackboxsw | we have a start to #cloud-config schema validation and I think debconf_selections falls under one of the modules with defined schema validation | 16:15 |
| Deckard111 | ah, nice, good hint | 16:16 |
| blackboxsw | so it could give you hints if that config key is improper or others | 16:16 |
| Deckard111 | Huh: cloudinit.config.schema.SchemaValidationError: Cloud config schema errors: apt: Additional properties are not allowed ('debconf-selections' was unexpected) | 16:26 |
| Deckard111 | oh. it is debconf_selections | 16:33 |
| Deckard111 | doh | 16:33 |
| darkblueb | like man ssh_config when all the others are ssh-xyz | 16:43 |
| darkblueb | impressive eyeballs there blackboxsw, if I may say so | 16:44 |
| blackboxsw | woot woot! #achievementunlocked<sharpeyes> | 16:44 |
| darkblueb | :p | 16:44 |
| * blackboxsw ♥'s schema validation | 16:45 | |
| Deckard111 | blackboxsw Ok, now i can see that debconf_selections is properly set - however it is set AFTER the package is already installed by apt | 17:10 |
| Deckard111 | so apt install still fails | 17:10 |
| blackboxsw | bah, ordering of pkg install vs selections | 17:11 |
| Deckard111 | yeah, always wondered about the ordering thing | 17:11 |
| Deckard111 | anyway to fix this unless I do the install 'manually' in the cmd section? | 17:12 |
| blackboxsw | checking the code now https://github.com/canonical/cloud-init/blob/main/cloudinit/config/cc_apt_configure.py | 17:13 |
| blackboxsw | Deckard111: so package-update-upgrade-install should be run in cloud_finale_modules: (listed in order in /etc/cloud/cloud.cfg) and apt-configure module should be run during cloud_config_modules stage which occurs before cloud_finale. so I don't see how that happens afterward. | 17:15 |
| blackboxsw | on your instance if you wanted to re-run cloud-init across a reboot from scratch you could `sudo apt remove postfix; cloud-init clean --logs --reboot` | 17:16 |
| blackboxsw | you can run `cloud-init analyze show` to see the order of config modules run on the last boot | 17:17 |
| blackboxsw | not sure if I lost my last msg so resending: to me it looks like anything in "debconf_selections" gets run before "packages: []" get installed in typical cloud.cfg module ordering. But if needed one could run their debconf-set-selections commands directly from bootcmd: via something like this https://cloudinit.readthedocs.io/en/latest/topics/modules.html#bootcmd | 17:22 |
| Deckard111 | you are right, it runs in the same order | 17:25 |
| Deckard111 | *correct order | 17:25 |
| blackboxsw | _roger | 17:25 |
| Deckard111 | "debconf-show postfix | grep mail" shows: | 17:27 |
| Deckard111 | debconf show postfix | grep mail | 17:27 |
| Deckard111 | postfix/mailname: 0 | 17:28 |
| Deckard111 | * postfix/main_mailer_type: 'No configuration' | 17:28 |
| Deckard111 | postfix/mailbox_limit: 0 | 17:28 |
| Deckard111 | postfix/procmail: false | 17:28 |
| Deckard111 | so apparently it is set | 17:28 |
| Deckard111 | I think I need to explicelty set the system mail name, too | 17:29 |
| Deckard111 | will try and test | 17:29 |
| Deckard111 | blackboxsw I think I got it from here. Thank you very much for your time, patience and advice | 17:42 |
| Deckard111 | awesome help! | 17:43 |
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