Sigma Devops muocod

Make config file:

sudo nano /etc/nginx/sites-available/bot.conf

Then copy and paste bot.conf content and edit YOUR.DOMAIN strings. Now install Let's Encrypt on your server. For example in Debian you need to add jessie-backports and easily install it with apt-get:

sudo apt-get install -t jessie-backports letsencrypt

Then get cert for you domain:

List of Linux networking tools

netstat (ss)

Displays contents of /proc/net files. It works with the Linux Network Subsystem, it will tell you what the status of ports are ie. open, closed, waiting, masquerade connections. It will also display various other things. It has many different options. Netstat (Network Statistic) command display connection info, routing table information etc. To displays routing table information use option as -r.

Sample output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)    
tcp4 0 0 127.0.0.1.62132 127.0.0.1.http ESTABLISHED

Find the original here article here: Devops Best Practices

DevOps started out as "Agile Systems Administration". In 2008, at the Agile Conference in Toronto, Andrew Shafer posted an offer to moderate an ad hoc "Birds of a Feather" meeting to discuss the topic of "Agile Infrastructure". Only one person showed up to discuss the topic: Patrick Debois. Their discussions and sharing of ideas with others advanced the concept of "agile systems administration". Debois and Shafer formed an Agile Systems Administrator group on Google, with limited success. Patrick Debois did a presentation called "Infrastructure and Operations" addressing

Enable TCP port 2375 for external connection to Docker

See this issue.
Docker best practise to Control and configure Docker with systemd.

Create daemon.json file in /etc/docker:

 {"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}

Backup GitLab to DigitalOcean Spaces

GitLab uses Fog to communicate with various object storage services when running backups. Fog works with S3 as well as S3-compatible services like Spaces. The key difference is that you need to explictly set the endpoint for non-S3 services. If you are using the "ominbus" GitLab packages, you would need to add the following to /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {

Backup:

Create snapshot:

> nodetool snapshot thingsboard (or you cat set you namespace) Requested creating snapshot(s) for [all keyspaces] with snapshot name [1522059918232] and options {skipFlush=false} Snapshot directory: 1522059918232

Copy snapshot on another directory:

	ziping files/directories examples

	Creates the archive data.zip and puts all the files in the current directory in it in compressed form, type:

	$ zip data *

	Note: No need to add .zip extension or suffix as it is added automatically by zip command.
	Use the ls command to verify new zip file:
	$ ls

	Ansible playbook to setup HTTPS using Let's encrypt on nginx.

	The Ansible playbook installs everything needed to serve static files from a nginx server over HTTPS.
	The server pass A rating on [SSL Labs](https://www.ssllabs.com/).

	To use:
	1. Install [Ansible](https://www.ansible.com/)
	2. Setup an Ubuntu 16.04 server accessible over ssh
	3. Create `/etc/ansible/hosts` according to template below and change example.com to your domain
	4. Copy the rest of the files to an empty directory (`playbook.yml` in the root of that folder and the rest in the `templates` subfolder)

	FROM ubuntu:latest
	RUN apt-get -y update && apt-get -y upgrade
	RUN apt-get -y install openjdk-8-jdk wget
	RUN mkdir /usr/local/tomcat
	RUN wget http://www-us.apache.org/dist/tomcat/tomcat-8/v8.5.16/bin/apache-tomcat-8.5.16.tar.gz -O /tmp/tomcat.tar.gz
	RUN cd /tmp && tar xvfz tomcat.tar.gz
	RUN cp -Rv /tmp/apache-tomcat-8.5.16/* /usr/local/tomcat/
	EXPOSE 8080
	CMD /usr/local/tomcat/bin/catalina.sh run

	# Set AWS credentials and S3 paramters
	AWS_KEY=""
	AWS_SECRET=""
	S3_BUCKET=""
	S3_BUCKET_PATH="/"
	S3_ACL="x-amz-acl:private"

	function s3Upload
	{
	path=$1