traefik: kubernetes service not found: xyz

Check if the removed application left the ingressroute behind.

$ kubectl delete ingressroute -n ${NAMESPACE} ${INGRESSROUTE_APP}

helm3: installing kubeapps over TLS

$ kubectl create ns kubeapps

$ helm install  kubeapps --namespace kubeapps bitnami/kubeapps \

  --set ingress.enabled=true \

  --set ingress.certManager=true \

  --set ingress.hosts[0].name=kubeapps.medogz.com \

  --set ingress.hosts[0].tls=true \

  --set ingress.hosts[0].tlsSecret=kubeapps-tls

2. Create the secret

$ kubectl -n default create secret tls kubeapps-tls -n kubeapps --key=/path/STAR_medogz_com.key --cert=/path/STAR_medogz_com.crt 

3. Get the token to access the kubeapps.medogz.com

$  kubectl get secret $(kubectl get serviceaccount kubeapps-operator -o jsonpath='{.secrets[].name}') -o jsonpath='{.data.token}' -o go-template='{{.data.token | base64decode}}' && echo

4. Access https:/kubeapps.medogz.com

NOTE: After the login, some images will load from external network and the site won't be accessed fully by TLS.

Lenovo thinkpad x1: How to enable the Keyboard Backlight ?

On the keyboard, the keys that are used to enable or disable the backlight is the Fn + Space bar.

golang 1.15 released

 https://golang.org/doc/go1.15

simple grep to remove commented lines in bash

$ grep -v '#' /etc/profile

cura-lulzbot: Print stalls/stop when gnome/xfce kick screen blank or screensaver

Workaround:

$ vblank_mode=0 cura-lulzbot

More info: https://github.com/Ultimaker/Cura/issues/3842

kubectl: decode a secret

$ kubectl get secrets  registry-medogz-tls-cert -o yaml | grep " tls.crt: " | cut -d ':' -f 2 | awk '{$1=$1};1' | base64 -d

----BEGIN CERTIFICATE-----

MIIDZjCCAk4CCQDjsgIRiJ4soTANBgkqhkiG9w0BAQsFADB6MQswCQYDVQQGEwJV

UzEWMBQGA1UEBwwNTmV3IEhhbXBzaGlyZTEPMA0GA1UECgwGbWVkb2d6MSEwHwYD

VQQDDBhJTlRFUk1FRElBVEUgbWVkb2d6LmhvbWUxHzAdBgkqhkiG9w0BCQEWEG1l

aXNAbWVkb2d6LmhvbWUwHhcNMjAwODAzMDEzNDMxWhcNMjUwODAzMDEzNDMxWjBw

MQswCQYDVQQGEwJVUzELMAkGA1UECAwCTkgxDzANBgNVBAcMBk5hc2h1YTEUMBIG

Nx5qyZfObKcsTNZpzH+3Ihiu0ax/ScPHSZvAp4FH3AEUK+XWSBg9qU9HP/e15XrI

75GGfw2M7bim+EOnDVii9wEnwKRRSKFJhHmPrWJF2mCyezYx80EsRE5l2djkkpuC

yYbYmyHBGYN3jewpOc1UZAvDJUMJsmVdS9+skRzcMsoppxyI7BMk/2jmlMgm0+7K

X/UsyJ4k3Yd02g==

-----END CERTIFICATE-----

speedtest-cli

$ wget -O speedtest-cli https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
$ chmod +x speedtest-cli

$ ./speedtest-cli

Reference: https://www.cyberciti.biz/faq/install-speedtest-cli-on-centos-redhat-fedoa-scientific-to-measure-internetspeed/

golang: gnome DBus Notification

Worked nice:

https://github.com/TheCreeper/go-notify

golang: Emoji :)

Emoji for golang:

https://github.com/hackebrot/turtle

Golang Desktop Automation. Control the mouse, keyboard, bitmap, read the screen

Cool project:

https://github.com/go-vgo/robotgo

Certificate Terminology

• CA - Certificate Authority. CA is an entity that issues digital certificates for use by other parties. It is an example of a trusted third party. CAs are characteristic of many public key infrastructure (PKI) schemes.
• 
  
• CSR - Certificate Signing Request. CSR is a message sent from an applicant to a certificate authority in order to apply for a digital identity certificate.
• 
  
• PEM - Privacy-enhanced Electronic Mail. The .pem file name extension is used for a Base64-encoded X.509 certificate.
• 
  
• CRT  - The CRT extension is used for certificates.

    DER -  The DER extension is used for binary DER encoded.

    req_extensions - declares request extensions to be included in PKCS #10 certificate signing request (CSR) objects. 

self signed certificate: wildcard certificate

Generate private key

$ openssl genrsa -des3 -out medogzca.key 2048

Generating RSA private key, 2048 bit long modulus (2 primes)

.............................................................+++++

......+++++

e is 65537 (0x010001)

Enter pass phrase for medogzca.key:

Verifying - Enter pass phrase for medogzca.key:

Create CA-signed certificate

$ openssl req -x509 -new -nodes -key medogzca.key -sha256 -days 3650 -out medogzca.pem

Enter pass phrase for medogzca.key:

You are about to be asked to enter information that will be incorporated

into your certificate request.

What you are about to enter is what is called a Distinguished Name or a DN.

There are quite a few fields but you can leave some blank

For some fields there will be a default value,

If you enter '.', the field will be left blank.

-----

Country Name (2 letter code) [XX]:US

State or Province Name (full name) []:MYSTATE

Locality Name (eg, city) [Default City]:MYCITY

Organization Name (eg, company) [Default Company Ltd]:medogz

Organizational Unit Name (eg, section) []:code devel

Common Name (eg, your name or your server's hostname) []:*.medogz.home

Email Address []:meis@medogz.home