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https://github.com/kevinveenbirkenbach/computer-playbook.git
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Kevin Veen-Birkenbach
ff7b7aeb2d
Compute per-container CPU/RAM shares based on active services (web-/svc-*, enabled=true or undefined). Cast host facts to numbers, add safe min=1, and output compose-ready values. Include robust unit test. Also: include resource.yml.j2 in base template and minor formatting tidy-up. https://chatgpt.com/share/68d2d96c-9bf4-800f-bbec-d4f2c0051c06
42 lines
1.5 KiB
YAML
42 lines
1.5 KiB
YAML
# Host resources
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RESOURCE_HOST_CPUS: "{{ ansible_processor_vcpus | int }}"
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RESOURCE_HOST_MEM: "{{ (ansible_memtotal_mb | int) // 1024 }}"
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# Reserve for OS
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RESOURCE_HOST_RESERVE_CPU: 2
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RESOURCE_HOST_RESERVE_MEM: 4
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# Available for apps
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RESOURCE_AVAIL_CPUS: "{{ (RESOURCE_HOST_CPUS | int) - (RESOURCE_HOST_RESERVE_CPU | int) }}"
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RESOURCE_AVAIL_MEM: "{{ (RESOURCE_HOST_MEM | int) - (RESOURCE_HOST_RESERVE_MEM | int) }}"
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# Count active docker services (only roles starting with web- or svc-; service counts if enabled==true OR enabled is undefined)
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RESOURCE_ACTIVE_DOCKER_CONTAINER_COUNT: >-
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{{
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applications
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| active_docker_container_count(group_names, '^(web-|svc-).*', ensure_min_one=True)
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}}
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# Per-container fair share (numbers!), later we append 'g' only for the string fields in compose
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RESOURCE_CPUS_NUM: >-
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{{
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((RESOURCE_AVAIL_CPUS | float) / (RESOURCE_ACTIVE_DOCKER_CONTAINER_COUNT | float))
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| round(2)
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}}
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RESOURCE_MEM_RESERVATION_NUM: >-
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{{
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(((RESOURCE_AVAIL_MEM | float) / (RESOURCE_ACTIVE_DOCKER_CONTAINER_COUNT | float)) * 0.7)
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| round(1)
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}}
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RESOURCE_MEM_LIMIT_NUM: >-
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{{
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(((RESOURCE_AVAIL_MEM | float) / (RESOURCE_ACTIVE_DOCKER_CONTAINER_COUNT | float)) * 1.0)
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| round(1)
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}}
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# Final strings with units for compose defaults (keep numbers above for math elsewhere if needed)
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RESOURCE_CPUS: "{{ RESOURCE_CPUS_NUM }}"
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RESOURCE_MEM_RESERVATION: "{{ RESOURCE_MEM_RESERVATION_NUM }}g"
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RESOURCE_MEM_LIMIT: "{{ RESOURCE_MEM_LIMIT_NUM }}g"
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RESOURCE_PIDS_LIMIT: 512
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