Add prometheus questions

And answers to two Docker questions.
This commit is contained in:
abregman 2019-10-04 19:05:24 +03:00
parent 2e3e307856
commit 0d9b9f35e8

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@ -10,7 +10,7 @@
1. [Ansible](#ansible)
1. [Docker](#docker)
1. [Python](#python)
1. [Prometheus](#prometheus)
## Jenkins
@ -227,15 +227,41 @@ I'm {{ ansible_hostname }} and my operating system is {{ ansible_distribution }
* What happens when you run `docker run hello-world`?
```
Docker CLI passes your request to Docker daemon.
Docker daemon downloads the image from Docker Hub
Docker daemon creates a new container by using the image it downloaded
Docker daemon redirects output from container to Docker CLI which redirects it to the standard output
```
* How do you run a container?
* What do you see when you run `docker ps`?
* What `docker commit` does? when will you use it?
* Explain what is Dockerfile used for and the content of the following Dockerfile
```
FROM registry.access.redhat.com/rhel7/rhel
RUN yum -y install httpd && yum -y update; yum clean all
EXPOSE 80
ENTRYPOINT [ "/usr/sbin/httpd" ]
CMD [ "-D", "FOREGROUND" ]
```
Answer:
```
Use the image 'rhel7/rhel' from the registry 'registry.access.redhat.com` to run httpd.
Befor running it, install the httpd package, update all packages and expose port 80.
```
## Python
###### beginner
##### beginner
* What data type supported in Python and which of them are mutable?
What function can you use to show that a certain data type is mutable?
@ -271,7 +297,7 @@ PEP8 is a list of coding conventions and style guidelines for Python
5. Use 4 spaces per indentation level
```
###### Intermediate
##### Intermediate
* What _ is used for in Python?
@ -295,3 +321,18 @@ sorted(x, key=lambda l: l[1])
```
set([food for bro in x for food in bro['food']])
```
## Prometheus
* Describe the following Prometheus components:
- Prometheus server
- Push Gateway
- Alert Manager
```
Prometheus server responsible for scraping the storing the data
Push gateway is used for short-lived jobs
Alert manager is responsible for alerts ;)
```
* What is an exporter? What is it used for?