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September 2018
Free monitoring for MySQL,
MariaDB, PostgreSQL and
MongoDB
Bartłomiej Oleś
Presenter
bart@severalnines.com

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Copyright 2017 Severalnines AB
I'm Jean-Jérôme from the Severalnines Team and
I'm your host for today's webinar!
Feel free to ask any questions in the Questions
section of this application or via the Chat box.
You can also contact me directly via the chat box
or via email: info@severalnines.com during or
after the webinar.
Your host & some logistics

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Copyright 2017 Severalnines AB

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Free to download
Initial 30 days Enterprise trial
Converts into free Community Edition
Enterprise / paid versions available

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Automation & Management
Deployment (Free Community)
● Deploy a Cluster in Minutes
○ On-Prem
○ Cloud (AWS/Azure/Google) - paid
Monitoring (Free Community)
● Systems View with 1 sec Resolution
● DB / OS stats & Performance Advisors
● Configurable Dashboards
● Query Analyzer
● Real-time / historical
Management (Paid Features)
● Backup Management
● Upgrades & Patching
● Security & Compliance
● Operational Reports
● Automatic Recovery & Repair
● Performance Management
● Automatic Performance Advisors

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Copyright 2017 Severalnines AB
Supported Databases

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Our Customers

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Poll - Which of the following free monitoring tools
does your currently company use?
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(choose many)
● Traditional (Nagios, Zabbix, ...)
● Saas based monitoring (MMS, ...)
● Specialized (PMM, MySQL OpsPack, ...)
● ClusterControl
● Other

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Copyright 2017 Severalnines AB
Copyright 2018 Severalnines AB
Monitoring distributed database systems
- Requirements

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Most databases are somehow distributed today
● Services running on multiple hosts
○ Replication
○ Sharding
○ Clustering
● Multiple Data Centers
○ Cloud and/or On-prem
○ Disaster Recovery
● Load balancing and Single point of contact IP
○ For workload management, HA, query caching...
○ E.g., HAProxy, KeepAlived/VIP, ProxySQL, MaxScale

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Why we need a database monitoring system
● Data is a key asset of the organisation
● Databases are important as they manage the source of truth
● Database is complex - IO, transaction engine, query optimizer,
caches, locks, versioning,...
● Very dependent on OS, IO subsystems, network
● Distribution across multiple instances makes it even more complex
● Good database monitoring helps make sense of all that

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A “good” monitoring system involves
● Collection, Correlation
● Presentation
● Interpretation/analysis
● Interactions between concurrently
executing processes
● Integration with other platforms

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Who uses database monitoring
● Managers
○ To improve project implementation
○ Keep track on internal or external SLA’s
○ Track team performance
○ Budgeting
○ Monitor KPIs
● Business
○ To inform and improve future programmes and projects
○ Inform stakeholders
● DBA, DevOps, SysOps
○ Prevent and event
○ Query caching
○ DB Firewall

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Support for multiple DB platforms

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Monitoring is not management

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What is management?
Included in the free ClusterControl Community version

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Copyright 2017 Severalnines AB
Copyright 2018 Severalnines AB
Cloud-based vs On-prem monitoring
solutions

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Comparing cloud-based vs on-prem
Cloud-based monitoring
● Benefits
○ Quick and easy configuration
○ Managing your solution over time
is also easier
○ Remote access from any location
or device with browsing
capabilities
● Drawbacks
○ Security
○ Reliability and stability
On-prem monitoring
● Benefits
○ A level of control that
cloud-based solutions just can't
provide
○ Performance reliability
○ Control over data, security
● Drawbacks
○ Installation and setup
○ Data access

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Cloud monitoring

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Poll - TBD
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Which databases do you currently monitor?
● MySQL
● MariaDB
● PostgreSQL
● MongoDB
● Other

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Copyright 2018 Severalnines AB
Agent-based vs Agentless

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Agentless vs Agent-based monitoring
Agentless Agent-based
Deployment
Software on ClusterControl host
only. Up and running within minutes
Agent installed on each monitored DB server
Admin. Overhead.
Only CC needs to be maintained Agents need to be maintained, updated, restarted in case of
failures
Configuration
Centralized Decentralized
Security
Controller to SSH into managed DBs,
requires certain privileges.
More secure. Agent communication to DB/OS is internal to
the server. No additional firewall rules.
Network Overhead
Additional traffic with more connections Local data collection, results processed and then shipped
to the server
Metrics resolution
High resolution at the cost of many
connections
High resolution, a lot of data can be collected locally by the
agent. No gaps in data if the network connection fails.

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Copyright 2018 Severalnines AB
Deepdive into
ClusterControl Community Edition

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ClusterControl Requirements
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● Installed on a single machine
○ 2GB of RAM, 2CPU and 20GB disk space
running on x86 architecture
● Can run on-prem or in the cloud
● Web-GUI or Command Line
● With or without agents
● Supported platforms:
○ RedHat/CentOS 6.x/7.x
○ Ubuntu 12.04/14.04/16.04 LTS
○ Debian 7.x/8.x

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Monitoring is highly available
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3 simple steps to deploy ClusterControl
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Download and execute installation script
$ wget http://www.severalnines.com/downloads/cmon/install-cc
$ chmod +x install-cc
$ ./install-cc # as root or sudo user
Generate SSH keys
$ ssh-keygen -t rsa #generates ssh key
Copy SSH keys (on-prem monitoring)
ssh-copy-id root@clustercontrolhost # clustercontrol
ssh-copy-id root@dbhost1 #your database host
...

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Cluster Control Architecture
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Metrics Collection
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SSH Host metrics collection (process, load balancers stats, resource usage and consumption, etc.) using
SSH library
Database client Database metrics collection (status, queries, variables, usage etc) using the respective database client
library
Advisor Mini programs written using ClusterControl Domain Specific Language (DSL)
Agent based uses Prometheus exporters to capture metrics data from the system it monitors. Statistics are then
stored in the time series DB

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Technology specific dashboards
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● MySQL
○ standalone, MySQL Replication, NDB
Cluster, InnoDB Cluster/Group
Replication
● MariaDB
○ standalone, Replication, Galera Cluster
● Percona Server for MySQL
○ standalone, Percona XtraDB Cluster
● PostgreSQL
○ standalone, Streaming Replication
● MongoDB Inc.
○ standalone, ReplicaSet, Sharded Cluster
● Percona Server for MongoDB
○ standalone, ReplicaSet, Sharded Cluster

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Query Monitoring
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● Top queries
● Running queries
● Query Outliers

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Performance Advisors
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● Predefined advisors
● Custom advisors and developer studio

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Other features available to Community
users
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● Deployment
○ 15+ DB topologies
○ Standalone
○ Replication setups
○ Cluster setups
● ClusterControl CLI
● Topology view

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Copyright 2018 Severalnines AB
Demo

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Poll - TBD
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Are you currently using ClusterControl for monitoring and management?
● Yes
● I’m going to download it
● Not convinced yet

35.
Copyright 2017 Severalnines AB
Copyright 2018 Severalnines AB
Q & A

36.
End of Year Promotion
Get Three Months Free
25% In
Savings
Just Sign By December 20th!
with an Annual Contract

37.
Links & Resources
● Download / install ClusterControl
● ClusterControl Community Edition Page
● Contact us: info@severalnines.com