Added Heat AutoScaling documentation
Change-Id: I94927ccd62be3c594c6ca3623aa37c92ca81bd8d
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heat_template_version: 2013-05-23
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description: Creates an autoscaling group based on Surveil's metrics
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parameters:
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image:
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type: string
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default: rhel7-updated
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description: Image used for servers
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key:
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type: string
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default: < USER KEY HERE >
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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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default: c1.small
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description: flavor used by the web servers
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network_public:
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type: string
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default: public-01
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description: Public network used by the server
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network_private:
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type: string
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default: private-01
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description: Private network used by the server
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monitoring_server:
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type: string
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default: < SURVEIL SERVER IP HERE >
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description: Monitoring server address to allow connections from
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resources:
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asg:
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type: OS::Heat::AutoScalingGroup
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properties:
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min_size: 1
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max_size: 6
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resource:
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type: OS::Nova::Server
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properties:
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flavor: {get_param: flavor}
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image: {get_param: image}
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key_name: {get_param: key}
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networks:
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- network: {get_param: network_public}
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- network: {get_param: network_private}
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security_groups:
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- default
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- sysadmin
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- insecure
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metadata:
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metering.stack: {get_param: "OS::stack_id"}
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surveil_tags: linux-system-nrpe
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user_data_format: RAW
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user_data:
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str_replace:
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template: |
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#!/bin/bash -v
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rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
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yum install -y nrpe wget bc svn
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yum install -y nagios-plugins-users nagios-plugins-disk nagios-plugins-load --disablerepo=rhel-7-server-openstack-6.0-rpms
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mkdir -p /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_users
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svn checkout https://github.com/savoirfairelinux/monitoring-tools/tags/0.3.2/plugins/check-cpu /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_cpu
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svn checkout https://github.com/savoirfairelinux/monitoring-tools/tags/0.3.2/plugins/check-mem /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_mem
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wget https://raw.githubusercontent.com/fpeyre/nagios-plugins/master/check_swap -P /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_swap/
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chmod +x /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_swap/check_swap
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chmod +x /usr/lib64/nagios/plugins/sfl-monitoring-tools/check_users/check_users.sh
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sed -i 's/^allowed_hosts=.*$/allowed_hosts=$monitoring_server/' /etc/nagios/nrpe.cfg
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echo "command[check_disk]=/usr/lib64/nagios/plugins/check_disk -w 85 -c 90 " >> /etc/nagios/nrpe.cfg
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echo "command[check_cpu]=/usr/lib64/nagios/plugins/sfl-monitoring-tools/check_cpu/check_cpu -w 80 -c 90 " >> /etc/nagios/nrpe.cfg
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echo "command[check_memory]=/usr/lib64/nagios/plugins/sfl-monitoring-tools/check_mem/check_mem -u -w 80.0 -c 90.0 " >> /etc/nagios/nrpe.cfg
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echo "command[check_swap]=/usr/lib64/nagios/plugins/sfl-monitoring-tools/check_swap/check_swap 20 10 " >> /etc/nagios/nrpe.cfg
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echo "command[check_users]=/usr/lib64/nagios/plugins/check_users -w 2 -c 4 " >> /etc/nagios/nrpe.cfg
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systemctl enable nrpe
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systemctl start nrpe
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params:
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$monitoring_server: {get_param: monitoring_server}
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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: 30
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scaling_adjustment: 1
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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: 30
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scaling_adjustment: -1
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users_alarm_high:
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type: OS::Ceilometer::Alarm
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properties:
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description: Scale-up if the average connected users is > 3 for 1 minute
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meter_name: SURVEIL_users
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statistic: avg
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period: 60
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evaluation_periods: 1
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threshold: 3
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alarm_actions:
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- {get_attr: [server_scaleup_policy, alarm_url]}
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matching_metadata: {'stack': {get_param: "OS::stack_id"}}
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comparison_operator: gt
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users_alarm_low:
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type: OS::Ceilometer::Alarm
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properties:
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description: Scale-down if the average connected users is < 1 for 1 minute
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meter_name: SURVEIL_users
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statistic: avg
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period: 60
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evaluation_periods: 1
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threshold: 1
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alarm_actions:
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- {get_attr: [server_scaledown_policy, alarm_url]}
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matching_metadata: {'stack': {get_param: "OS::stack_id"}}
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comparison_operator: lt
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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: [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: [server_scaledown_policy, alarm_url]}
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ceilometer_query:
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value:
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str_replace:
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template: >
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ceilometer statistics -m SURVEIL_users
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-q metadata.user_metadata.stack=$stackval -p 600 -a avg
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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 Ceilometer query for statistics on the SURVEIL_users meter
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Samples about OS::Nova::Server instances in this stack. The -q
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parameter selects Samples according to the subject's metadata.
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When a VM's metadata includes an item of the form metering.X=Y,
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the corresponding Ceilometer resource has a metadata item of the
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form user_metadata.X=Y and samples about resources so tagged can
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be queried with a Ceilometer query term of the form
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metadata.user_metadata.X=Y. In this case the nested stacks give
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their VMs metadata that is passed as a nested stack parameter,
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and this stack passes a metadata of the form metering.stack=Y,
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where Y is this stack's ID.
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@ -0,0 +1,11 @@
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Heat AutoScaling with Surveil
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-----------------------------
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When used with OpenStack integration, Surveil export metrics to Ceilometer. This allows for auto scaling based on application metrics with Heat.
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For example, the ``autoscaling.yaml`` template below allows for scaling when there is an average of more than four users connected to the machines in the stack (via ssh).
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autoscaling.yml
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***************
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.. literalinclude:: ../examples/autoscaling.yaml
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@ -10,6 +10,7 @@ Using Surveil
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installing_surveil
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monitoring_a_host_with_passive_checks
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monitoring_with_your_custom_plugin
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heat_autoscaling
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Contributing
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------------
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