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tech:notes_cloudinit [2025/03/26 10:04] – Jean-Baptistetech:notes_cloudinit [2026/04/27 18:15] (Version actuelle) – Jean-Baptiste
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 +<!DOCTYPE markdown>
 +{{tag>Brouillon Boot IAAC}}
 +
 +# Notes cloudinit
 +
 +Voir :
 +* https://readthedocs.org/projects/cloudinit/downloads/pdf/latest/
 +* https://blog.octo.com/cloudinit-kesako/
 +* https://www.scaleway.com/docs/how-to-use-cloud-init-to-configure-your-server-at-first-boot/
 +
 +Voir aussi :
 +* Tiny Cloud
 +
 +~~~
 +ubuntu@vm-testjb1:~$ curl 169.254.169.254/1.0/meta-data/public-keys/0/openssh-key
 +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDCZQwNs9aV//oN/N/NmbVqL83ahLatiVccLR1w2YEVBGX2fj5ANnj7a7hNk1tyld+CQlP93I6z7CW9bBxUjwwcxYWeVmBVRBLtFnjhN56gL7jGfXy6uwtUAf84tKWRem10tThIZhjWIIMHfDyFT7vVVN/hk9E3tQ7CejHK3NzhBUjDzrQ8yVIRynveNe93KNlCHW8T0rD83vqmEwApep/EuGD4rwb1e4zYAeh0HXVQIQzaoXlz8OwEBgzkvygCRrtUJcn3bQIloBmu2KrDvPskhqgCU4I9sbkN/K9PLn5hJVmhHVT3Prf0eU8hbrzdnfXlczmLbmVYTqUlOIvrvbAT jibe@vmdeb1ubuntu@vm-testjb1:~$
 +~~~
 +
 +~~~yaml
 +#cloud-config
 +packages:
 +- git-core
 +
 +#cloud-config
 +apt_update: true
 +
 +#!
 +echo "plop" > /plop
 +
 +environment: "production"
 +
 +output: {all: '| tee -a /var/log/cloud-init-output.log'}
 +~~~
 +
 +~~~
 +**************************************************************************
 +# This system is using the EC2 Metadata Service, but does not appear to  #
 +# be running on Amazon EC2 or one of cloud-init's known platforms that   #
 +# provide a EC2 Metadata service. In the future, cloud-init may stop     #
 +# reading metadata from the EC2 Metadata Service unless the platform can #
 +# be identified.                                                         #
 +#                                                                        #
 +# If you are seeing this message, please file a bug against              #
 +# cloud-init at                                                          #
 +#    https://bugs.launchpad.net/cloud-init/+filebug?field.tags=dsid      #
 +# Make sure to include the cloud provider your instance is               #
 +# running on.                                                            #
 +#                                                                        #
 +# For more information see                                               #
 +#   https://bugs.launchpad.net/bugs/1660385                              #
 +#                                                                        #
 +# After you have filed a bug, you can disable this warning by            #
 +# launching your instance with the cloud-config below, or                #
 +# putting that content into                                              #
 +#    /etc/cloud/cloud.cfg.d/99-ec2-datasource.cfg                        #
 +#                                                                        #
 +# #cloud-config                                                          #
 +# datasource:                                                            #
 +#  Ec2:                                                                  #
 +#   strict_id: false                                                     #
 +**************************************************************************
 +
 +Disable the warnings above by:
 +  touch /home/ubuntu/.cloud-warnings.skip
 +or
 +  touch /var/lib/cloud/instance/warnings/.skip
 +~~~
 +
 +
 +## DRAFT - Se connecter à une instance dont on ne possède pas la clef
 +
 +Voir : 
 +* https://docs.aws.amazon.com/fr_fr/AWSEC2/latest/UserGuide/user-data.html
 +
 +FIXME
 +
 +~~~bash
 +aws --region=eu-central-1 ec2 describe-instances --output=table
 +~~~
 +
 +''my_script.sh''
 +~~~bash
 +#!/bin/bash
 +cat >> /home/ec2-user/.ssh/authorized_keys <<EOF
 +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDCZQwNs9aV//oN/N/NmbVqL83ahLatiVccLR1w2YEVBGX2fj5ANnj7a7hNk1tyld+CQlP93I6z7CW9bBxUjwwcxYWeVmBVRBLtFnjhN56gL7jGfXy6uwtUAf84tKWRem10tThIZhjWIIMHfDyFT7vVVN/hk9E3tQ7CejHK3NzhBUjDzrQ8yVIRynveNe93KNlCHW8T0rD83vqmEwApep/EuGD4rwb1e4zYAeh0HXVQIQzaoXlz8OwEBgzkvygCRrtUJcn3bQIloBmu2KrDvPskhqgCU4I9sbkN/K9PLn5hJVmhHVT3Prf0eU8hbrzdnfXlczmLbmVYTqUlOIvrvbAT jibe@vmdeb1
 +EOF
 +
 +sed -i 's/^PasswordAuthentication/#&/' /etc/ssh/sshd_config
 +systemctl restart sshd
 +~~~
 +
 +~~~bash
 +base64 my_script.sh > my_script_base64.txt
 +~~~
 +
 +
 +~~~bash
 +aws ec2 --region=eu-central-1 modify-instance-attribute --instance-id i-08df328706b9e6d46 --attribute userData --value file://my_script_base64.txt
 +~~~
 +
 +
 +## Autres
 +
 +/var/lib/cloud/data/set-hostname
 +
 +File
 +/etc/cloud/cloud-init.disabled
 +
 +Kernel
 +~~~ini
 +cloud-init=disabled
 +~~~
 +
 +
 +## Pb
 +
 +### Pb temps de démarrage élevé
 +
 +~~~
 +# systemd-analyze
 +Startup finished in 3.195s (kernel) + 23.788s (userspace) = 26.983s
 +graphical.target reached after 23.230s in userspace
 +
 +# systemd-analyze blame
 +         11.755s cloud-init-local.service
 +          5.854s docker.service
 +          3.440s mariadb.service
 +          2.459s cloud-init.service
 +          2.317s isc-dhcp-server.service
 +          1.984s php7.3-fpm.service
 +          1.916s proftpd.service
 +          1.200s cloud-config.service
 +          1.138s ifupdown-pre.service
 +           946ms bind9.service
 +           911ms dev-mapper-vgos\x2droot
 +~~~
 +
 +Logs 
 +* /var/log/cloud-init.log
 +* /var/log/cloud-init-output.log
 +
 +~~~bash
 +curl http://169.254.169.254/openstack/2018-08-27/meta_data.json
 +~~~
 +
 +#### Solution
 +
 +~~~bash
 +dpkg -i cloud-init_20.2-2~deb10u1_all.deb cloud-guest-utils_0.29-1_all.deb
 +
 +echo "network: {config: disabled}" > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
 +rm /etc/network/interfaces.d/50-cloud-init.cfg
 +~~~
 +
 + 
 +
 +
  
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