vault backup: 2025-01-19 21:14:51

15 files changed, 0 insertions, 166 deletions

diff --git a/3 resources/ansible/ad-hoc-commands.md b/3 resources/ansible/ad-hoc-commands.md
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-Using ansible we can perform ad-hoc commands, useful for a one-off thing that won't require writing a full playbook.
-
-Some examples include:
-update apt cache:
-```
-ansible <pattern> -m ansible.builtin.apt -a "update_cache=true cache_valid_time=3600"
-```
-
-update packages:
-```
-ansible <pattern> -m ansible.builtin.apt -a "name=* state=latest"
-```
-
-run puppet:
-```
-ansible <pattern> -a "/opt/puppetlabs/bin/puppet agent --test"
-```
-
-reboot:
-```
-ansible <pattern> -m ansible.builtin.reboot -f 1
-```
-
-[[ansible]]
-#ansible
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diff --git a/3 resources/ansible/ansible.md b/3 resources/ansible/ansible.md
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-At its heart it's just an abstraction over running commands remotely over SSH. It enables some powerful automation like setting up a server following a predetermined script.
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diff --git a/3 resources/ansible/build-array-loop.md b/3 resources/ansible/build-array-loop.md
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-How to construct an array variable containing results of an iterative ansible task?
-Use register. The referenced variable will contain a property results which is a list containing the combined outputs of the loop.
-
-https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_loops.html#registering-variables-with-a-loop
-
-[[ansible]]
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diff --git a/3 resources/ansible/build-list-silences.md b/3 resources/ansible/build-list-silences.md
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-Explain what I did today at work to build a list of silences and then have one task to unsilence all of them.
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diff --git a/3 resources/ansible/debug.md b/3 resources/ansible/debug.md
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-```
-- name: Print the gateway for each host when defined
-  ansible.builtin.debug:
-    msg: System {{ inventory_hostname }} has gateway {{ ansible_default_ipv4.gateway }}
-  when: ansible_default_ipv4.gateway is defined
-
-- name: Get uptime information
-  ansible.builtin.shell: /usr/bin/uptime
-  register: result
-
-- name: Print return information from the previous task
-  ansible.builtin.debug:
-    var: result
-    verbosity: 2
-
-- name: Display all variables/facts known for a host
-  ansible.builtin.debug:
-    var: hostvars[inventory_hostname]
-    verbosity: 4
-
-- name: Prints two lines of messages, but only if there is an environment value set
-  ansible.builtin.debug:
-    msg:
-    - "Provisioning based on YOUR_KEY which is: {{ lookup('ansible.builtin.env', 'YOUR_KEY') }}"
-    - "These servers were built using the password of '{{ password_used }}'. Please retain this for later use."
-```
-
----
-https://docs.ansible.com/ansible/latest/collections/ansible/builtin/debug_module.html
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diff --git a/3 resources/ansible/default-filter.md b/3 resources/ansible/default-filter.md
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-Using the default filter, if we reference an undefined variable we can set a default: `{{ var | default([]) }}`.
-
-defaults:
-- int
-- str
-- list ([])
-- dict ({})
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diff --git a/3 resources/ansible/delegate-to.md b/3 resources/ansible/delegate-to.md
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-Through the use of delegate to, we can run a task for certain nodes and delegate work on behalf of those nodes to other hosts.
-
-A great example of usage is this:
diff --git a/3 resources/ansible/dicts.md b/3 resources/ansible/dicts.md
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-Merged using combine: `{{ dict1 | ansible.builtin.combine(dict2) }}`
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diff --git a/3 resources/ansible/extra-vars.md b/3 resources/ansible/extra-vars.md
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-We can pass variables to the ansible upon invoking it using `--extra-vars` or `-e`.
-
-```
---extra-vars "blaat=piet henk=joop"
---extra-vars '{"blaat":"piet","henk":"joop"}'
---extra-vars "@file.json"
---extra-vars "@file.yml"
-```
diff --git a/3 resources/ansible/find.md b/3 resources/ansible/find.md
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-```
-- name: Find file with size >= 50G
-  ansible.builtin.find:
-    paths:
-      - /var/lib/nova/instances/_base
-    size: 50g
-```
----
-https://docs.ansible.com/ansible/latest/collections/ansible/builtin/find_module.html
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diff --git a/3 resources/ansible/loop-output.md b/3 resources/ansible/loop-output.md
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-Using the label field we can select what to print, instead of the whole item.
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diff --git a/3 resources/ansible/loop-register.md b/3 resources/ansible/loop-register.md
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-When using a loop the registered variable will contain the results of all the responses:
-```JSON
-{
-    "changed": true,
-    "msg": "All items completed",
-    "results": [
-        {
-            "changed": true,
-            "cmd": "echo \"one\" ",
-            "delta": "0:00:00.003110",
-            "end": "2013-12-19 12:00:05.187153",
-            "invocation": {
-                "module_args": "echo \"one\"",
-                "module_name": "shell"
-            },
-            "item": "one",
-            "rc": 0,
-            "start": "2013-12-19 12:00:05.184043",
-            "stderr": "",
-            "stdout": "one"
-        },
-        {
-            "changed": true,
-            "cmd": "echo \"two\" ",
-            "delta": "0:00:00.002920",
-            "end": "2013-12-19 12:00:05.245502",
-            "invocation": {
-                "module_args": "echo \"two\"",
-                "module_name": "shell"
-            },
-            "item": "two",
-            "rc": 0,
-            "start": "2013-12-19 12:00:05.242582",
-            "stderr": "",
-            "stdout": "two"
-        }
-    ]
-}
-```
-
-Thus we can loop over each results `{{ registered_var.results }}`.
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diff --git a/3 resources/ansible/loop-results-prior-loop.md b/3 resources/ansible/loop-results-prior-loop.md
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-```YAML
-- name: First loop
-  loop: {{ blaat }}
-  register: loooped
-  ...
-
-- name: Second loop
-  loop: {{ loooped.results }}
-  when: item.skipped is not defined
-```
-
-this loops over results of prior loop only but does not process any skipped results.
-
-In case the results array contains another array that we want to loop over, for example when we did a shell command in a loop we can use extract:
-```
-- name: Print magic
-  ansible.builtin.debug:
-    msg: "{{ ['stdout_lines'] | map('extract', item) }}"
-    loop: "{{ magic.results }}"
-```
-
-A cool example of this in practice:
-```
-- name: Print blockpull command
-  ansible.builtin.debug:
-    msg: "virsh blockpull {{ ['stdout_lines'] | map('extract', item) | list | flatten | join(' ') }}"
-  loop: "{{ domain_and_disk_paths.results }}"
-  loop_control:
-    label: "{{ inventory_hostname }}"
-```
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diff --git a/3 resources/ansible/nested-loops.md b/3 resources/ansible/nested-loops.md
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-Nested loops can be done not by nesting loops over two separate lists, but by looping over the [[Cartesian product]] of the two using the `product` filter.
-
-`{{ list1 | product(list) | list }}`
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diff --git a/3 resources/ansible/set-facts.md b/3 resources/ansible/set-facts.md
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-These can be used to set and update variables specific to nodes, at runtime. 
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