I have written a basic loud init script, but when I pasted it in ec2 user-data section , nothing happened , I am trying to install docker on ec2 and run a script , later i will replace script with docker pull and docker run commands.
I can see my myScript is created in /var/lib/cloud/.. but other than that docker is not installed , neither my script is executed on initialization
Content-Type: multipart/mixed; boundary="//"
MIME-Version: 1.0
--//
Content-Type: text/cloud-config; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="cloud-config.txt"
#cloud-config
runcmd:
- yum update -y
- amazon-linux-extras install docker
- service docker start
- usermod -a -G docker ec2-user
- chkconfig docker on
- yum install cronie cronie-anacron
cloud_final_modules:
- [scripts-user, always]
- scripts-per-boot
write_files:
- path: /var/lib/cloud/scripts/per-boot/myScript.sh
permissions: "0755"
content: |
#!/bin/bash
echo "Hello World. The time is now $(date -R)!" >> $HOME/out.txt
--//--
I can see following error :
[ 21.351635] cloud-init[2073]: /var/lib/cloud/instance/scripts/runcmd: line 3: amazon-linux-extras: command not found
[ 21.401571] cloud-init[2073]: Redirecting to /bin/systemctl start docker.service
[ 21.413452] cloud-init[2073]: Failed to start docker.service: Unit docker.service not found.
[ 21.435199] cloud-init[2073]: usermod: group 'docker' does not exist
[ 21.461179] cloud-init[2073]: error reading information on service docker: No such file or directory
[ 22.101289] cloud-init[2073]: Last metadata expiration check: 0:00:03 ago on Tue May 9 11:12:15 2023.
[ 22.194901] cloud-init[2073]: Dependencies resolved.
[ 22.211092] cloud-init[2073]: ================================================================================
[ 22.216627] cloud-init[2073]: Package Arch Version Repository Size
[ 22.241169] cloud-init[2073]: ================================================================================
[ 22.247514] cloud-init[2073]: Installing:
[ 22.250614] cloud-init[2073]: cronie x86_64 1.5.7-1.amzn2023.0.2 amazonlinux 115 k
[ 22.301177] cloud-init[2073]: cronie-anacron x86_64 1.5.7-1.amzn2023.0.2 amazonlinux 32 k
[ 22.308338] cloud-init[2073]: Transaction Summary
[ 22.324286] cloud-init[2073]: ================================================================================
[ 22.341349] cloud-init[2073]: Install 2 Packages
[ 22.344540] cloud-init[2073]: Total download size: 147 k
[ 22.353227] cloud-init[2073]: Installed size: 341 k
The error is very clear. The first line is telling you exactly what is wrong:
line 3: amazon-linux-extras: command not found
You are trying to use a command (amazon-linux-extras) which does not exist on the server.
The amazon-linux-extras library was something for older Amazon Linux versions. The newer versions of Amazon Linux do not have an amazon-linux-extras library.
To install Docker on newer versions, you simply need to run yum install -y docker instead of amazon-linux-extras install docker.