219 lines
6.8 KiB
YAML
219 lines
6.8 KiB
YAML
heat_template_version: rocky
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description: AutoScaling a selfhealing cluster
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parameters:
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image:
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type: string
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description: Image used for servers
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key:
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type: string
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description: SSH key to connect to the servers
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flavor:
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type: string
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description: flavor used by the web servers
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security_group:
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type: string
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description: security_group used by the web servers
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network:
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type: string
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description: Network used by the server
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subnet:
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type: string
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description: subnet on which the load balancer will be located
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external_network:
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type: string
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description: UUID or Name of a Neutron external network
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resources:
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start_container_agent:
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type: OS::Heat::SoftwareConfig
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properties:
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group: ungrouped
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config: {get_file: ./start-container-agent.sh}
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asg:
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type: OS::Heat::AutoScalingGroup
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properties:
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min_size: 2
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desired_capacity: 2
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max_size: 6
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rolling_updates:
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min_in_service: 1
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max_batch_size: 1
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pause_time: 10
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resource:
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type: lb_server.yaml
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properties:
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root_stack_id: {get_param: "OS::stack_id"}
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flavor: {get_param: flavor}
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external_network: {get_param: external_network}
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security_group: {get_param: security_group}
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image: {get_param: image}
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key_name: {get_param: key}
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network: {get_param: network}
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subnet: {get_param: subnet}
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pool_id: {get_resource: pool}
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metadata: {"metering.server_group": {get_param: "OS::stack_id"}}
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user_data: {get_attr: [start_container_agent, config]}
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web_server_scaleup_policy:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 60
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scaling_adjustment: 1
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web_server_scaledown_policy:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 60
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scaling_adjustment: -1
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scaleup_policy_percent:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: percent_change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 5
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scaling_adjustment: 50
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min_adjustment_step: 1
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scaledown_policy_percent:
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type: OS::Heat::ScalingPolicy
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properties:
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adjustment_type: percent_change_in_capacity
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auto_scaling_group_id: {get_resource: asg}
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cooldown: 5
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scaling_adjustment: -50
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min_adjustment_step: 1
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cpu_alarm_high:
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type: OS::Aodh::GnocchiAggregationByResourcesAlarm
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properties:
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description: Scale up if CPU > 80%
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metric: cpu_util
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aggregation_method: mean
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granularity: 600
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evaluation_periods: 1
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threshold: 80
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resource_type: instance
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comparison_operator: gt
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alarm_actions:
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- str_replace:
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template: trust+url
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params:
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url: {get_attr: [web_server_scaleup_policy, signal_url]}
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query:
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list_join:
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- ''
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- - {'=': {server_group: {get_param: "OS::stack_id"}}}
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cpu_alarm_low:
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type: OS::Aodh::GnocchiAggregationByResourcesAlarm
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properties:
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description: Scale down if CPU < 15% for 10 minutes
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metric: cpu_util
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aggregation_method: mean
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granularity: 600
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evaluation_periods: 1
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threshold: 15
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resource_type: instance
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comparison_operator: lt
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alarm_actions:
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- str_replace:
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template: trust+url
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params:
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url: {get_attr: [web_server_scaledown_policy, signal_url]}
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query:
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list_join:
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- ''
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- - {'=': {server_group: {get_param: "OS::stack_id"}}}
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lb:
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type: OS::Octavia::LoadBalancer
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#type: OS::Neutron::LBaaS::LoadBalancer
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properties:
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vip_subnet: {get_param: subnet}
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listener:
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type: OS::Octavia::Listener
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#type: OS::Neutron::LBaaS::Listener
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properties:
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loadbalancer: {get_resource: lb}
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protocol: HTTP
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protocol_port: 80
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pool:
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type: OS::Octavia::Pool
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#type: OS::Neutron::LBaaS::Pool
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properties:
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listener: {get_resource: listener}
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lb_algorithm: ROUND_ROBIN
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protocol: HTTP
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#session_persistence:
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# type: SOURCE_IP
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#
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lb_monitor:
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#type: OS::Neutron::LBaaS::HealthMonitor
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type: OS::Octavia::HealthMonitor
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properties:
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pool: { get_resource: pool }
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type: TCP
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delay: 5
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max_retries: 5
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timeout: 5
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# assign a floating ip address to the load balancer
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# pool.
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lb_floating:
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type: OS::Neutron::FloatingIP
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properties:
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floating_network: {get_param: external_network}
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port_id: {get_attr: [lb, vip_port_id]}
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outputs:
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scale_up_url:
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description: >
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This URL is the webhook to scale up the autoscaling group. You
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can invoke the scale-up operation by doing an HTTP POST to this
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URL; no body nor extra headers are needed.
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value: {get_attr: [web_server_scaleup_policy, alarm_url]}
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scale_dn_url:
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description: >
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This URL is the webhook to scale down the autoscaling group.
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You can invoke the scale-down operation by doing an HTTP POST to
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this URL; no body nor extra headers are needed.
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value: {get_attr: [web_server_scaledown_policy, alarm_url]}
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scale_up_percent_url:
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value: {get_attr: [scaleup_policy_percent, signal_url]}
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scale_down_percent_url:
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value: {get_attr: [scaledown_policy_percent, signal_url]}
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pool_ip_address:
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value: {get_attr: [lb, vip_address]}
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description: The IP address of the load balancing pool
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website_url:
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value:
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str_replace:
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template: http://host/rico.html
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params:
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host: { get_attr: [lb_floating, floating_ip_address] }
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description: >
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This URL is the "external" URL that can be used to access the
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Wordpress site.
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gnocchi_query:
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value:
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str_replace:
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template: >
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gnocchi measures aggregation --resource-type instance
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--query 'server_group="stackval"'
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--granularity 300 --aggregation mean -m cpu_util
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params:
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stackval: { get_param: "OS::stack_id" }
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description: >
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This is a Gnocchi query for statistics on the cpu_util measurements about
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OS::Nova::Server instances in this stack. The --resource-type select the
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type of Gnocchi resource. The --query parameter filters resources
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according to its attributes. When a VM's metadata includes an item of the
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form metering.server_group=X, the corresponding Gnocchi resource has a
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attribute named server_group that can queried with 'server_group="X"' In
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this case the nested stacks give their VMs metadata that is passed as a
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nested stack parameter, and this stack passes a metadata of the form
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metering.server_group=X, where X is this stack's ID.
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