- hosts: 22rrvgndns01
gather_facts: no
vars_files:
- /etc/ansible/dnschange/dns_resource_record.yml
tasks:
- shell: grep "{{item.name}}" check_result.txt
args:
chdir: /cluster/dnschange
when: "{{item.action}}" is match("delete")
with_items: "{{resource_record}}"
Here is the resource_record:
- resource_record:
- name: test.201.apn.epc.mnc002.mcc505.3gppnetwork.org
record_type: naptr
action: create
view: MME
ttl: 300
order: 100
preference: 999
flags: s
service: x-3gpp-pgw:x-gn:x-gp:x-s5-gtp
replacement: wip-ows-pgw-e-NSW.node.epc.mnc002.mcc505.3gppnetwork.org
I got the error when I executed the script
The offending line appears to be:
chdir: /cluster/dnschange
when: "{{item.action}}" is match("delete")
^ here
I could be wrong, but this one looks like it might be an issue with
missing quotes. Always quote template expression brackets when they
start a value. For instance:
with_items:
- {{ foo }}
Should be written as:
with_items:
- "{{ foo }}"
Can anyone help me out?
I guess your indentation is wrong and change in when condition. Can you try as below
- shell: grep "{{item.name}}" check_result.txt
args:
chdir: /cluster/dnschange
when: item.action == 'delete'
with_items: "{{resource_record}}"
Related
trying to loop with a list to create a append a yaml file; getting some syntactical error ?
any idea how we can fix this ?
- name: "append yml"
shell: echo "instances:\n\n - name: all\n - command: all\n - arguments:\n - cluster_name: dbtype{{ item }} all\n - host: {{ipv4}}\n" >> /path/dbtype-config.yml
shell: echo " - auth_source: admin\n - ssl: false\n - ssl_insecure_skip_verify: false\n - labels:\n - env: env\n" >> /tmp/newrelic-infra/integrations.d/dbtype-config.yml
with_items: "{{ instances.stdout_lines }}"
ERROR! Syntax Error while loading YAML.
The error appears to have been in '/ansible/projects/newrelic/dbtype_nr.yml': line 27, column 47, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
- name: "update yml"
shell: echo "instances:\n\n - name: all\n - command: all\n - arguments:\n - cluster_name: dbtype{{ item }} all\n - host: {{ipv4}}\n" >> /path/dbtype-config.yml
^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes. Always quote template expression brackets when they
start a value. For instance:
with_items:
- {{ foo }}
Should be written as:
with_items:
- "{{ foo }}"
looks like it's something similar to #Unknown's suggestion, put single quotes around the : inside of the echo.
Also, are you certain two shell commands will work inside of the single task? I would make two tasks, like:
- name: "append 1st yml"
shell: echo 'first part'
with_items: "{{ my_list }}"
- name: "append 2nd yml"
shell: echo 'second part'
with_items: "{{ my_list }}"
I'm trying to figure out how to "remove" the warning message [WARNING]: Could not match supplied host pattern, ignoring: ps_nodes, by fixing the root cause. The root cause for me is that when we do Linux machine creation we will have the ps_nodes hosts empty. So, I was trying to add the block: + when: (os_type|capitalize) == "Windows", to assure that Play to only execute when os_type is a Windows creation.
How can I achieve that? Because, what I'm trying is to use the when condiction, but looks like it's not possible, and I'm not sure what to search anymore.
Code example:
- name: "Start handling of vm specific delete scripts for Windows machines"
block:
hosts: ps_nodes
any_errors_fatal: false
gather_facts: false
vars:
private_ip_1: "{{ hostvars['localhost']['_private_ip_1']|default('') }}"
scripts: "{{ hostvars['localhost']['scripts'] }}"
sh_script_dir: "{{ hostvars['localhost']['sh_script_dir'] }}"
cred_base_hst: "{{ hostvars['localhost']['cred_base_hst'] }}"
cred_base_gst: "{{ hostvars['localhost']['cred_base_gst'] }}"
newline: "\n"
tasks:
- import_tasks: roles/script/tasks/callWindowsScripts.yml
when: action == 'delete'
when: (os_type|capitalize) == "Windows"
Error using 'when' for a Play:
ERROR! 'when' is not a valid attribute for a Play
The error appears to be in '/opt/projectX/playbooks/create_vm.yml': line 265, column 3, but may
be elsewhere in the file depending on the exact syntax problem.
The offending line appears to be:
##############################################################################
- name: \"Start handling of vm specific delete scripts for Windows machines\"
^ here
I think the problem is the indentation. Use 'and':
- name: "Start handling of vm specific delete scripts for Windows machines"
block:
hosts: ps_nodes
any_errors_fatal: false
gather_facts: false
vars:
private_ip_1: "{{ hostvars['localhost']['_private_ip_1']|default('') }}"
scripts: "{{ hostvars['localhost']['scripts'] }}"
sh_script_dir: "{{ hostvars['localhost']['sh_script_dir'] }}"
cred_base_hst: "{{ hostvars['localhost']['cred_base_hst'] }}"
cred_base_gst: "{{ hostvars['localhost']['cred_base_gst'] }}"
newline: "\n"
tasks:
- import_tasks: roles/script/tasks/callWindowsScripts.yml
when: action == 'delete' and (os_type|capitalize) == "Windows"
Got it,
What if you use a host that exists, like localhost, check the number of hosts in ps_nodes and delegate_to them?
Something like this:
hosts: localhost
vars:
tasks:
- import_tasks: roles/script/tasks/callWindowsScripts.yml
delegate_to: ps_nodes
when: {{ ps_nodes | length > 0}}
Same issue and fixed by "indent":
- hosts: test
roles:
- role: test
vars:
k: 1
when: "'dbg' in ansible_run_tags"
Hello guys I have a Problem.
The Problem I am having at the moment, is that the role to copy the files will skip all the files no matter if the file with the filenames is empty or not.
In Role1 I want to save the output of cat for each file. In Role2 in the when conditional, I want the task to skip if the registered output is == "".
Role1:
---
- name: copy files
shell: "cat path{{ item }}files"
register: checkempty
loop:
- test1
- test2
- test3
- test4
Role2:
---
- name: Copy Files
copy:
src: "{{ var1 }}{{ var2 }}{{ var3 }}{{ var4 }}{{ item }}/"
dest: "{{ copy_dest_sys }}" #destination path
loop: "{{ lookup('file', 'pathtofile/file').split('\n')}}"
when: hostvars['localhost'].checkempty.results == ""
Playbook:
- name: check emptiness
hosts: localhost
become: yes
vars_files:
- ../variables/varsfile
roles:
- ../variables/role1
- name: Copy Files to prod/stag
hosts: "{{hosts_exec}}"
become: yes
vars_files:
- ../vars/recommendation-delta.yml
roles:
- ../roles/role2
How can I set a registered variable with with_items and compare the output of it to ""(nothing)?
Can somebody help me with this issue?
When you register a variable, it is set only on the specific host on which that task was executing. So if you are running a role on localhost that does this:
---
- name: Check if sys files Empty
command: if [ ! -s filenames/"{{ item }}"files ]; then echo "{{ item }}fileempty"; fi
register: checkempty
loop:
- sys
- wifi
- recoprop
- udfprop
Then you would reference it like this when running tasks on another host:
hostvars["localhost"].checkempty
For example:
---
- name: Copy sys Files to prod/stag
copy:
src: "{{ git_dest }}{{ git_sys_files }}{{ item }}/"
dest: "{{ copy_dest_sys }}" #destination path
loop: "{{ lookup('file', '/home/ansible/repo/hal_ansible/scripts/delta-reco/filenames/sysfiles').split('\n')}}"
when: 'hostvars["localhost"].checkempty.stdout == "sysfileempty"'
You can read more about this in the "Using Variables" documentation.
I've made some corrections to your when syntax here as well. In general, you should never use {{...}} markers in a when condition because a when condition is always evaluated as a Jinja expression.
However, you have another problem:
Your "Check if sys files Empty" task is using the command module, but you're trying to run a shell script. That will always fail. You need to use the shell module instead:
---
- name: Check if sys files Empty
shell: if [ ! -s filenames/"{{ item }}"files ]; then echo "{{ item }}fileempty"; fi
register: checkempty
loop:
- sys
- wifi
- recoprop
- udfprop
I was a little bit surprised to discover that his piece of code fails with an IOError exception instead of defaulting to omitting the value.
#!/usr/bin/env ansible-playbook -i localhost,
---
- hosts: localhost
tasks:
- debug: msg="{{ lookup('ini', 'foo section=DEFAULT file=missing-file.conf') | default(omit) }}"
How can I load a value without raising an exception?
Please note that the lookup module supports a default value parameter but this one is useless to me because it works only when it can open the file.
I need a default value that works even when the it fails to open the file.
As far as I know Jinja2 unfortunately doesn't support any try/catch mechanism.
So you either patch ini lookup plugin / file issue to Ansible team, or use this ugly workaround:
---
- hosts: localhost
gather_facts: no
tasks:
- debug: msg="{{ lookup('first_found', dict(files=['test-ini.conf'], skip=true)) | ternary(lookup('ini', 'foo section=DEFAULT file=test-ini.conf'), omit) }}"
In this example first_found lookup return file name if file exists or empty list otherwise. If file exists, ternary filter calls ini lookup, otherwise omit placeholder is returned.
In case people like me stumble upon this question in 2022,
Ansible now supports rescue blocks, which is similar to try-catch-finally in programming languages.
Examples can be found in the official documentation Error handling with blocks.
You can use block/rescue as follows:
- hosts: localhost
tasks:
- block:
- debug: msg="{{ lookup('ini', 'foo section=DEFAULT file=missing-file.conf') }}"
rescue:
- debug: msg="omit"
You can also convert your input file with a from_yaml filter before using the default filter
- name: "load a yaml file or a default value"
set_fact:
myvar: "{{ lookup('file', 'myfile.yml', errors='ignore') | from_yaml | default(mydefaultObject, true) }}"
To avoid the error when the path doesn't exist, use a condition to check for the path before attempting the lookup:
---
- hosts: localhost
tasks:
- debug: msg="{{ lookup('ini', 'foo section=DEFAULT file=missing-file.conf') }}"
when: missing-file.conf | exists
You can use this with set_fact as well, then omit the undefined var when using it if required:
- hosts: localhost
tasks:
- set_fact:
foo: "{{ lookup('ini', 'foo section=DEFAULT file=missing-file.conf') }}"
when: missing-file.conf | exists
- debug:
var: foo # undefined
msg: "{{ foo | default(omit) }}" # omitted
Note that lookups and Jinja2 tests run on the controller. If you need to check the path on the host, use the stat and either slurp or fetch modules:
- stat:
file: missing-remote-file-with-text-i-want
register: file
- slurp:
src: missing-remote-file-with-text-i-want
register: slurp
when: file.stat.exists
- set_fact:
foo: "{{ slurp.content | b64decode }}"
when: file.stat.exists
- fetch:
src: missing-file.conf
dest: /tmp/fetched
fail_on_missing: False
- set_fact:
bar: "{{ lookup('ini', 'foo section=DEFAULT file=/tmp/fetched/' + inventory_hostname + '/missing-file.conf') }}"
when: ('/tmp/fetched/' + inventory_hostname + '/missing-file.conf') | exists
Second note, in Ansible v2.5 the grammar for using the path tests was changed, the format is now:
- set_fact:
foo: "{{ lookup('ini', 'foo section=DEFAULT file=missing-file.conf') }}"
when: missing-file.conf is exists
I want to conditionally define a variable in an Ansible playbook like this:
my_var: "{{ 'foo' if my_condition}}"
I would like the variable to remain undefined if the condition does not resolve to true.
Ansible gives the following error if I try to execute the code:
fatal: [foo.local] => {'msg': 'AnsibleUndefinedVariable: One or more undefined
variables: the inline if-expression on line 1 evaluated
to false and no else section was defined.', 'failed': True}
Why is this an error anyway?
The complete case looks like this:
{role: foo, my_var: "foo"}
If my_var is defined, the role does something special. In some cases, I don't want the role to do this. I could use when: condition, but then I would have to copy the whole role block. I could also use an extra bool variable, but I would like a solution without having to change the "interface" to the role.
Any ideas?
You could use something like this:
my_var: "{{ 'foo' if my_condition else '' }}"
The 'else' will happen if condition not match, and in this case will set a empty value for the variable. I think this is a short, readable and elegant solution.
This code may help you to define a variable with condition.
- hosts: node1
gather_facts: yes
tasks:
- name: Check File
shell: ls -ld /etc/postfix/post-install
register: result
ignore_errors: yes
- name: Define Variable
set_fact:
exists: "{{ result.stdout }}"
when: result|success
- name: Display Variable
debug: msg="{{ exists }}"
ignore_errors: yes
So here the exists will display only if the condition is true.
My example, after https://stackoverflow.com/a/43403229/5025060:
vars:
sudoGroup: "{{ 'sudo' if ansible_distribution == 'Ubuntu' else 'wheel' }}"
Because of the different sudo conventions used by Ubuntu versus other platforms, here I am telling Ansible to set a variable named sudoGroup to sudo if the platform is Ubuntu, otherwise set it to wheel.
Later in my playbook, I combine the variable with Ansible's user module to add either sudo or wheel to an account's secondary groups depending on the OS Ansible is running on:
- name: Add or update bob account
user:
name: bob
uid: 3205
groups: "{{ sudoGroup }}"
append: yes
NOTES:
Double quotes around the {{ variable }} are required in the user: groups: definition above.
Once I define sudoGroup as above in my playbook's global vars: section, Ansible configures it at run time (based on ansible_distribution) for each target I define in my hosts: section.
I believe you're after the default(omit) filter. (Reference).
As per the example, mode will behave like it wasn't set at all for the first two items in the loop.
- name: touch files with an optional mode
file:
dest: "{{item.path}}"
state: touch
mode: "{{item.mode|default(omit)}}"
loop:
- path: /tmp/foo
- path: /tmp/bar
- path: /tmp/baz
mode: "0444"
This can be set as with bool:
- name: Conditional (true and false)
set_fact:
my_boolean_set_to_be: "{{ 'true' if my_var == 'foo' else 'false' }}"
- name: Display Variable
debug: msg="{{ my_boolean_set_to_be }}"
This can be set as for more conditionals like 'if-ifelse-else' statements:
- name: Conditional for 'my_var' (2 options and one default)
set_fact:
my_var_set_to_be: "{{ 'breakfast' if my_var == 'morning' else 'lunch' if my_var == 'afternoon' else 'dinner' }}"
- name: Display Variable
debug: msg="{{ my_var_set_to_be }}"