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78 lines
2.8 KiB
78 lines
2.8 KiB
- name: check if target is an object
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fail:
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msg: target must be an object
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when: target is not mapping
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- name: check if target parameters are defined
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fail:
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msg: some target parameters are invalid or not defined
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when: target.name is not string
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- name: fail if prometheus is not present
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debug:
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msg: prometheus host is missing, will not add target
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when: services.prometheus is not defined or services.prometheus.hostname is not defined
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- block:
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- name: slurp prometheus config
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slurp:
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path: "{{ hostvars[services.prometheus.hostname]['prometheus_conf_file'] | d(prometheus_conf_file) }}"
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register: slurped_config_file
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delegate_to: "{{ services.prometheus.hostname }}"
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- name: parse config file
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set_fact:
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pm_config_file: "{{ slurped_config_file.content | b64decode | from_yaml }}"
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- name: construct scrape target config snippet
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set_fact:
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pm_target:
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job_name: "{{ target.name if (target.exact_name | d(false) == true) else (target.name ~ '-' ~ inventory_hostname ~ '-' ~ ansible_host) }}"
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scrape_interval: "{{ target.scrape_interval | d(None) }}"
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scrape_timeout: "{{ target.scrape_timeout | d(None) }}"
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metrics_path: "{{ target.url | d('/metrics') }}"
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scheme: "{{ target.scheme | d('http') }}"
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static_configs:
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- targets:
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- "{% if target.use_ip | d(false) == true -%}\
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{{ target.ip | d(ansible_host) }}\
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{% else -%}\
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{{ (target.hostname | d(host_name)) ~ '.' ~ (target.tld | d(host_tld)) }}\
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{% endif -%}{{ (':' ~ target.port) if target.port is defined else '' }}"
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- name: finalize building scrape snippet
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set_fact:
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pm_target_final: "{{ pm_target | combine(target.extra_params | d({}), recursive=true) | dict2items | rejectattr('value', 'equalto', None) | list | items2dict }}"
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- name: output scrape target config
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debug:
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msg: "{{ pm_target_final }}"
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- name: update prometheus config
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blockinfile:
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path: "{{ hostvars[services.prometheus.hostname]['prometheus_conf_file'] | d(prometheus_conf_file) }}"
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block: "{{ [pm_target_final] | to_nice_yaml(indent=2, width=512) | indent(width=2, first=true) }}"
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insertafter: "--- scrape config begin ---"
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marker: " # target: {mark}"
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marker_begin: "{{ pm_target_final.job_name }} begin"
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marker_end: "{{ pm_target_final.job_name }} end"
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delegate_to: "{{ services.prometheus.hostname }}"
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register: result
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- name: restart prometheus if its config was changed
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service:
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name: prometheus
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state: restarted
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delegate_to: "{{ services.prometheus.hostname }}"
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when: result.changed
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when: services.prometheus is defined and services.prometheus.hostname is defined
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