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confidential
Day 2 operations
OpenStack Meetup, Ottawa, Sep 26, 2017
confidential
Dirk Wallerstorfer
 Cloud Technology Strategist @ Dynatrace
 Tech enthusiast
 Husband
 Father
 Son
 Austrian (no kangaroos)
 Never seen “Sound of music”
 Yes, I own a lederhosn
 No, I don’t know how to yodel
@wall_dirk
dirk.wallerstorfer@dynatrace.com
confidential
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Day 0 Day 1 Day 2 Day 3
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NRPE (Nagios Remote Plugin Executor)
...
server_port=5666
nrpe_user=nrpe
allowed_hosts=10.0.0.10
...
/etc/nagios/nrpe.cfg
1
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
controller
compute1
compute2
confidential
NRPE (Nagios Remote Plugin Executor)
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
1
2
controller
compute1
compute2
Configuration
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NRPE (Nagios Remote Plugin Executor)
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
1
2
controller
compute1
compute2
define host {
address 10.0.0.3
...
}
...
define service {
...
check_command nova-list
}
etc/servers/controller.cfg
...
define command{
command_name nova-list
command_line /usr/local/nagios/plugins/nova-list
}
etc/objects/commands.cfg
#!/bin/env bash
export OS_USERNAME=admin
export OS_PASSWORD=admin
export OS_AUTH_URL=http://10.0.0.3:5000/v2.0
export OS_TENANT_NAME=admin
data=$(openstack server list 2>&1)
rv=$?
if [ "$rv" != "0" ] ; then
echo $data
exit $rv
fi
echo "$data" | grep -v -e '--------' -e '| Status ' -e '^$' | wc -l
/usr/local/nagios/plugins/nova-list
confidentialhttps://github.com/rochaporto/dashing-openstack
confidential
Nagios
 Monitoring IT infrastructure – and more ...
 Monitoring static entities
 Possibility to monitor dynamically created VMs
 Modify code of nova-api to reconfigure nagios after creation of new VM
 Otherwise shutdown instance will be displayed as outage
 Image that contains Nagios plugins || CAPS scripts to install plugins
 Alternative: Nagios XI – Enterprise
 Nagios Log Server
 Great talk from Nagios world 2014: Monitoring OpenStack
 https://www.youtube.com/watch?v=1U5fo6aPS-k
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Elastic
 Previously: ELK Stack
 Now: Elastic Stack
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Elastic Stack
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Elastic Stack
confidential
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10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
controller
compute1
compute2
1 Setup & Configure Elasticsearch
https://www.elastic.co/guide/en/elasticsearch/reference/current/setup.html
2 Setup & Configure Kibana
https://www.elastic.co/guide/en/kibana/current/setup.html
server.port: 5601
server.host: "10.0.0.10”
elasticsearch.url: "http://10.0.0.10:9200"
...
/etc/kibana/kibana.yml
network.host: 10.0.0.10
http.port: 9200
...
/etc/elasticsearch/elasticsearch.yml
confidential
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
controller
compute1
compute2
3 Setup & Configure Filebeats
filebeat.prospectors:
- input_type: log
paths:
- /var/log/keystone/*.log*
- /var/log/httpd/keystone*.log*
tags:
- keystone
exclude_files:
- ".gz$”
...
output.elasticsearch:
hosts: ["10.0.0.10:9200"]
#username: "elastic"
#password: "changeme"
...
filebeat.modules:
- module: apache2
access:
var.paths: ["/var/log/httpd/*.log*"]
/etc/filebeat/filebeat.yml
confidential
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
controller
compute1
compute2
4 Setup & Configure Metricbeats
metricbeat.modules:
- module: system
metricsets:
- cpu
- load
- filesystem
- fsstat
- memory
- network
- process
enabled: true
period: 10s
processes: ['.*']
output.elasticsearch:
hosts: ["10.0.0.10:9200"]
#username: "elastic"
#password: "changeme"
/etc/metricbeat/metricbeat.yml
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influxdbelasticsearch mysql
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Monasca Agent
The Monasca Agent supports collecting metrics from a variety of sources as follows:
 System metrics
 Nagios plugins
 Statsd
 Host alive (icmp/ssh)
 Process checks (# instances, memory, io, threads)
 Http Endpoint checks
 Service checks (mysql, rabbitmq)
 OpenStack process metrics
The Agent is extensible through configuration of additional plugins, written in Python.
confidential
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OpenStack Dynatrace Cloud
Dynatrace
Mission Control
OpenStack
Services
Nova,
Neutron,
Keystone,
...
Dynatrace cluster
Security Gateway
WebUI
Access to
OpenStack APIs
Server nodes
Tenant 1
9999
Tenant 2
9999
Tenant 3
9999
443 https
8443
443 https
confidential
Setup Dynatrace Security Gateway
# wget -O sgw.sh https://zzv94586.live.dynatrace.com/....
# /bin/sh swg.sh
1
10.0.0.3
10.0.0.4
10.0.0.5
10.0.0.10
controller
compute1
compute2
SGW
Setup Dynatrace OneAgents
# wget -O agent.sh https://zzv94586.live.dynatrace.com/....
# /bin/sh agent.sh
2
Configure Keystone endpoint3
confidential
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Correlation
 Correlation is a statistical measure that indicates the extent to which two or more variables fluctuate
together.
confidential
Correlation doesn‘t imply causation
B Z
Host CPU > 90%Service response time
increases by 2 seconds
B X
Z
C
A W
D
Y
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Resource capacity and utilization
OpenStack service availability/performance
Supporting services
Log analytics
Applications running on top
Dependencies
Correlation of metrics/events/data
Real user monitoring, UX affects $
PaaS
confidential
This is NOT a
REGULAR SIZE
application
environment!
B X
Z
C
A W
D
Y
confidential
confidential
confidential
Confidential, Dynatrace, LLC
Thanks for
having me!

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OpenStack Day 2 Operations

Editor's Notes

  1. OPTIMIZING MAINTENANCE AVAILABILITY COST OPTIMIZATION BILLING ENSURE IT MATCHES EXPECTATIONS
  2. monitoring IT infrastructure and more
  3. NRPE config @ controller Nagios config @ Nagios
  4. Beats are lightweight data shippers that you install as agents on your servers Beats have a small footprint and use fewer system resources than Logstash. Logstash provides a broad array of input, filter, and output plugins for collecting, enriching, and transforming data from a variety of sources. X-Pack: security, alerting (watcher), monitoring, reporting, graph, machine learning Cloud: hosted on AWS/GCP – scaling is easy, activate additional features on demand
  5. modules: apache2, nginx, mysql, syslog, ...
  6. configuration @ controller processes @ elastic
  7. Agents send data to APIs Read data through CLI or Grafana
  8. agent configuration in container for system metrics integration in Horizon, dashboards, and ‘graph metrics’
  9. not only correlation, also causal relation
  10. 相関関係は、原因を意味しません。
  11. Update of the Payment Service of one of the rookie developer that are convinced that you have to write everything on your own and reinvent the wheel on a daily basis. LET’S ASSUME YOU ARE MONITORING EVERYTHING ... in the most professional way, so you immediately notice any error or change in performance
  12. This is one of the things that can go wrong in OpenStack ... now I don’t to talk you out of doing OpenStack, on the contrary, I want to encourage you to think maintenance and operations from the beginning, and don’t just go with
  13. Putting it all together now. With large environments, manual introspection and correlation and log browsing won’t cut it anymore ... people don’t scale as well ...
  14. What do you need OpenStack for, if you 5 VMs with 8 services, and 2 applications.
  15. you need something that is easy to deploy, adaptable, and able to handle environments of that size