mirror of
https://github.com/jcwimer/docker-swarm-autoscaler
synced 2026-03-24 15:04:42 +00:00
34 lines
2.2 KiB
Bash
34 lines
2.2 KiB
Bash
CPU_PERCENTAGE_UPPER_LIMIT=85
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CPU_PERCENTAGE_LOWER_LIMIT=25
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while ls > /dev/null; do
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#scale up
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for service in $(curl --silent "${PROMETHEUS_URL}/api/v1/query?query=sum(rate(container_cpu_usage_seconds_total%7Bcontainer_label_com_docker_swarm_task_name%3D~%27.%2B%27%7D%5B5m%5D))BY(container_label_com_docker_swarm_service_name%2Cinstance)*100>${CPU_PERCENTAGE_UPPER_LIMIT}&g0.tab=1" | jq ".data.result[].metric | .container_label_com_docker_swarm_service_name" | sort | uniq); do
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service_name=$(echo $service | sed 's/\"//g')
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auto_scale_label=$(docker service inspect $service_name | jq '.[].Spec.Labels["cpu.autoscale"]')
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replica_maximum=$(docker service inspect $service_name | jq '.[].Spec.Labels["cpu.autoscale.maximum"]' | sed 's/\"//g')
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if [[ "${auto_scale_label}" == "\"true\"" ]]; then
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current_replicas=$(docker service inspect $service_name | jq ".[].Spec.Mode.Replicated | .Replicas")
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new_replicas=$(expr $current_replicas + 1)
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if [[ $replica_maximum -ge $new_replicas ]]; then
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echo scale up $service_name to $new_replicas
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docker service scale $service_name=$new_replicas
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fi
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fi
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done
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#scale down
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for service in $(curl --silent "${PROMETHEUS_URL}/api/v1/query?query=sum(rate(container_cpu_usage_seconds_total%7Bcontainer_label_com_docker_swarm_task_name%3D~%27.%2B%27%7D%5B5m%5D))BY(container_label_com_docker_swarm_service_name%2Cinstance)*100<${CPU_PERCENTAGE_LOWER_LIMIT}&g0.tab=1" | jq ".data.result[].metric | .container_label_com_docker_swarm_service_name" | sort | uniq); do
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service_name=$(echo $service | sed 's/\"//g')
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auto_scale_label=$(docker service inspect $service_name | jq '.[].Spec.Labels["cpu.autoscale"]')
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replica_minimum=$(docker service inspect $service_name | jq '.[].Spec.Labels["cpu.autoscale.minimum"]' | sed 's/\"//g')
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if [[ "${auto_scale_label}" == "\"true\"" ]]; then
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current_replicas=$(docker service inspect $service_name | jq ".[].Spec.Mode.Replicated | .Replicas")
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new_replicas=$(expr $current_replicas - 1)
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if [[ $replica_minimum -le $new_replicas ]]; then
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echo scale down $service_name to $new_replicas
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docker service scale $service_name=$new_replicas
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fi
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fi
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done
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done
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