Hi,
I have a plain-text file "routers" in versioning system which contains
host-names separated by newlines:
$ cat routers
r1
r2
r3
$
I also have routers configuration templates in versioning system as a
plain-text files. For example:
$ cat
system:syslog
system {
syslog {
host 10.10.10.153 {
any notice;
daemon info;
}
}
}
$
I can't change the format of those two types of files because they are used
by other systems. Now what I need, is to create Ansible inventory file from
this "routers" file, configuration file for Ansible
junos_config(https://docs.ansible.com/ansible/junos_config_module.html)
module from routers configuration template and finally Ansible playbook in
YAML. At the moment I use a bash script for this. Simplified, it takes four
arguments:
1. "routers" file
2. configuration template file(for example "system:syslog" described above)
3. ticket number in ticketing system(integer)
4. comment string(this is used in router to describe the change)
Based on the example above, "routers" file is converted to inventory file
with following content:
junipers ansible_connection=local
[junipers]
r1
r2
r3
"system:syslog" file is converted to a file name "<ticket_nr>.cfg" with
following content:
groups {
replace: system:syslog {
system {
syslog {
host 10.10.10.153 {
any notice;
daemon info;
}
}
}
}
}
Basically, bash script does something like this:
cat << EOF
groups {
replace: ${templatefile##*/} {
EOF
sed 's/^/ /' "$templatefile"
cat << EOF
}
}
EOF
And finally playbook file is generated:
- hosts: junipers
remote_user: admin
tasks:
- name: Change routers conf.
ignore_errors: yes
junos_config:
comment: "<comment>"
timeout: 60
port: 22
src: <ticket_nr>.cfg
src_format: text
replace: yes
"<comment>" and "<ticket_nr>" are arguments given to the bash script. In
addition, this bash script checks out the latest revision of mentioned
"routers" file and configuration template.
Now is there a better way to do all this without bash? While this works,
I'm feeling that I'm doing it wrong and I'm relying heavily on bash. Is it
possible to do all this in Ansible/Jinja2?
thanks,
Martin
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