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🦑☸️ How to install Netdata on Kubernetes using Helm ?

1) Step 1 - Install Helm on Linux | macOS
Next, we'll show you the steps you need to take to install Helm on Linux | macOS.

2) Download the Helm package from this link : https://github.com/helm/helm/releases

3) Unpack the package using tar -xvzf <downloaded-package>

4) Move the binary to usr / local / bin / helm

🦑We will be using an installation script that automates the steps above.

1) curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3

2) chmod 700 get_helm.sh

3) sudo ./get_helm.sh

4) MacOS users can also use brew's package management tool.

$ brew install helm

5) After installation, confirm that everything is ok by checking the current version:
$ helm version
version.BuildInfo{Version:"v3.4.0", GitCommit:"7090a89efc8a18f3d8178bf47d2462450349a004", GitTreeState:"clean", GoVersion:"go1.14.10"}

6) Add the helm-charts repository then update helm

$ helm repo add stable https://charts.helm.sh/stable
$ helm repo update

7) Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "stable" chart repository
Update Complete. ⎈Happy Helming!⎈

» Step 2 - Installing Netdata Using the Helm Chart
You can install Helm Chart in two ways:

1) Install from Netdata's Helm repository

2) Clone the Netdata Git repository.

3) Make sure you have git installed on your system

Clone the git repository locally

git clone https://github.com/netdata/helmchart.git netdata-helmchart

4) Let's install the chart:

helm install netdata ./netdata-helmchart/charts/netdata

5) Now you can see the Helm deployed:
$ helm list
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
netdata default 1 2020-11-20 18:41:46.244774507 +0000 UTC deployed netdata-3.1.0 v1.26.0

6) To check if the parent and child pods have been successfully deployed:
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
netdata-child-fgh5c 2/2 Running 0 16h
netdata-child-qzhjp 2/2 Running 0 16h
netdata-child-ssmhp 2/2 Running 0 16h
netdata-parent-55d88fc784-x66ss 1/1 Running 0 16h
Step 3. Open Netdata-parent with NodePort
In this tutorial, we will introduce deployment using NodePort.

Netdata is configured by default to run on port 19999.

To open the port, use the command shown below:
$ kubectl expose deployment netdata-parent --type="NodePort" --port 19999
Now you can check the port on which the service was provided with the kubectl get service command:

$ kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 21h
netdata ClusterIP 10.99.202.135 <none> 19999/TCP 17h
netdata-parent NodePort 10.97.24.181 <none> 19999:30939/TCP 16h

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Releases · helm/helm

The Kubernetes Package Manager. Contribute to helm/helm development by creating an account on GitHub.

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🦑🐧 How to enable rc.local shell script in systemd on Linux boot ?

1) Enabling rc.local shell script in systemd at boot of Linux system
Compatibility with /etc/rc.local is achieved through systemd using a special service called rc-local.service.

2) This module is automatically called in multi-user.target by systemd-rc-local-generator if /etc/rc.local is executable.

3) Executing rc.local shell script at boot time using systemd
Naturally, create or update / edit a file called /etc/rc.local using your favorite text editor.

I'm going to use the vim command:

$ sudo vim /etc/rc.local
## RHEL/CentOS/Fedora Linux отредактируйте файл /etc/rc.d/rc.local ##
$ sudo vim /etc/rc.d/rc.local

Add the required commands or call the script.
Here is my file:
#!/bin/sh
# add your commands
# call your scripts here

# let us set stuff for my wifi
/sbin/iw phy0 wowlan enable magic-packet disconnect

# last line must be exit 0
exit 0
Save and close the file when using vim.

🐧 How to save a file in Vi / Vim and exit

Make sure you set the executable permissions for the file with the chmod command:

$ sudo chmod -v +x /etc/rc.local

Setting up rc-local.service on Linux when systemd starts
All we need to do is enter the following systemctl command:

$ sudo systemctl enable rc-local.service

4) Reboot Linux:
$ sudo reboot
Check the status after reboot:
$ sudo systemctl status rc-local.service

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