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Merged further readings and references. Added absolute path for links

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Sumit Sulakhe 2021-02-08 07:08:22 -08:00 committed by Sumit Sulakhe
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12
courses/index.md
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@ -16,12 +16,12 @@ In this course, we are focusing on building strong foundational skills. The cour
- [Linux Networking](https://sumit419.github.io/school-of-sre/linux_networking/intro/)
- [Python and Web](https://sumit419.github.io/school-of-sre/python_web/intro/)
- Data
- [Relational databases(MySQL)](https://sumit419.github.io/school-of-sre/databases_sql/intro/)
- [NoSQL concepts](https://sumit419.github.io/school-of-sre/databases_nosql/intro/)
- [Big Data](https://sumit419.github.io/school-of-sre/big_data/intro/)
- [Systems Design](https://sumit419.github.io/school-of-sre/systems_design/intro/)
- [Metrics and Monitoring](https://sumit419.github.io/school-of-sre/metrics_and_monitoring/introduction/)
- [Security](https://sumit419.github.io/school-of-sre/security/intro/)
- [Relational databases(MySQL)](https://linkedin.github.io/school-of-sre/databases_sql/intro/)
- [NoSQL concepts](https://linkedin.github.io/school-of-sre/databases_nosql/intro/)
- [Big Data](https://linkedin.github.io/school-of-sre/big_data/intro/)
- [Systems Design](https://linkedin.github.io/school-of-sre/systems_design/intro/)
- [Metrics and Monitoring](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/introduction/)
- [Security](https://linkedin.github.io/school-of-sre/security/intro/)
We believe continuous learning will help in acquiring deeper knowledge and competencies in order to expand your skill sets, every module has added references which could be a guide for further learning. Our hope is that by going through these modules we should be able to build the essential skills required for a Site Reliability Engineer.

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courses/metrics_and_monitoring/alerts.md
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@ -13,7 +13,8 @@ any service breakdown due to a shortage of resources. On the other hand,
when a service goes down due to an issue, early detection and
notification of such incidents can help you quickly fix the issue.
![An alert notification received on Slack](images/image11.png) <p align="center"> Figure 8: An alert notification received on Slack </p>
![An alert notification received on Slack](images/image11.png)
<p align="center"> Figure 8: An alert notification received on Slack </p>
Today most of the monitoring services available provide a mechanism to
set up alerts on one or a combination of metrics to actively monitor the

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courses/metrics_and_monitoring/command-line_tools.md
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@ -27,7 +27,8 @@ on). Let's look at some of the tools that are predominantly used.
- `-x` -- When displaying processes matched by other options,
includes processes that do not have a controlling terminal.
![Results of top command](images/image12.png) <p align="center"> Figure 2: Results of top command </p>
![Results of top command](images/image12.png)
<p align="center"> Figure 2: Results of top command </p>
- `ss` -- The socket statistics command (ss) displays information
about network sockets on the system. This tool is the successor of
@ -52,8 +53,8 @@ on). Let's look at some of the tools that are predominantly used.
displays the statistics in a human-readable format.
![Memory
statistics on a host in human-readable form](images/image6.png) <p align="center"> Figure 4: Memory
statistics on a host in human-readable form </p>
statistics on a host in human-readable form](images/image6.png)
<p align="center"> Figure 4: Memory statistics on a host in human-readable form </p>
- `df --` The df command displays disk space usage statistics. The
`-i` command-line option is also often used to display
@ -61,7 +62,8 @@ on). Let's look at some of the tools that are predominantly used.
statistics. The `-h` command-line option is used for displaying
statistics in a human-readable format.
![Disk usage statistics on a system in human-readable form](images/image9.png) <p align="center"> Figure 5:
![Disk usage statistics on a system in human-readable form](images/image9.png)
<p align="center"> Figure 5:
Disk usage statistics on a system in human-readable form </p>
- `sar` -- The sar utility monitors various subsystems, such as CPU
@ -75,7 +77,8 @@ on). Let's look at some of the tools that are predominantly used.
specifies which network interface to watch.
![Network bandwidth usage by
active connection on the host](images/image2.png) <p align="center"> Figure 6: Network bandwidth usage by
active connection on the host](images/image2.png)
<p align="center"> Figure 6: Network bandwidth usage by
active connection on the host </p>
- `tcpdump` -- The tcpdump command is a network monitoring tool that
@ -94,5 +97,6 @@ active connection on the host </p>
- `port <port number>` -- Filters traffic to or from a particular
port
![tcpdump of packets on an interface](images/image10.png) <p align="center"> Figure 7: *tcpdump* of packets on *docker0*
![tcpdump of packets on an interface](images/image10.png)
<p align="center"> Figure 7: *tcpdump* of packets on *docker0*
interface on a host </p>

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courses/metrics_and_monitoring/introduction.md
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@ -45,26 +45,26 @@ following topics:
## Course content
- [Introduction](#introduction)
- [Introduction](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/introduction/#introduction)
- [Four golden signals of monitoring](#four-golden-signals-of-monitoring)
- [Four golden signals of monitoring](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/introduction/#four-golden-signals-of-monitoring)
- [Why is monitoring important?](#why-is-monitoring-important)
- [Why is monitoring important?](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/introduction/#why-is-monitoring-important)
- [Command-line tools](command-line_tools.md)
- [Command-line tools](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/command-line_tools/)
- [Third-party monitoring](third-party_monitoring.md)
- [Third-party monitoring](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/third-party_monitoring/)
- [Proactive monitoring using alerts](alerts.md)
- [Proactive monitoring using alerts](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/alerts/)
- [Best practices for monitoring](best_practices.md)
- [Best practices for monitoring](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/best_practices/)
- [Observability](observability.md)
- [Observability](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/observability/)
- [Logs](observability.md#logs)
- [Tracing](observability.md#tracing)
- [Logs](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/observability/#logs)
- [Tracing](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/bservability/#tracing)
[Conclusion](conclusion.md)
[Conclusion](https://linkedin.github.io/school-of-sre/metrics_and_monitoring/conclusion/)
##
@ -221,7 +221,8 @@ Before we discuss monitoring an application, let us look at the
monitoring infrastructure. Following is an illustration of a basic
monitoring system.
![Illustration of a monitoring infrastructure](images/image1.jpg) <p align="center"> Figure 1: Illustration of a monitoring infrastructure </p>
![Illustration of a monitoring infrastructure](images/image1.jpg)
<p align="center"> Figure 1: Illustration of a monitoring infrastructure </p>
Figure 1 shows a monitoring infrastructure mechanism for aggregating
metrics on the system, and collecting and storing the data for display.