In order to enable the new Grafana Unified alerting, you can add the following to your helm chart’s values.yaml file and upgrade your helm chart with the new values.
grafana.ini:
...
unified_alerting:
enabled: true
alerting:
enabled: falseProblem
You want to create a GKE cluster in Google using Terraform Cloud and the instructions provided https://registry.terraform.io/providers/hashicorp/google/4.3.0/docs/guides/getting_started#using-terraform-cloud-as-the-backend
You are creating a service account in Google Service Accounts and you have set up the environment variable GOOGLE_CREDENTIALS (after removing the new lines from the json file with tr -d '\n' < original_google_file.json > no_newlines_google_file.json.
But when trying to create the GKE cluster you get the following error in Terraform
Required 'compute.networks.create' permission
Solution
The default permissions when creating the Service Account are not enough.
Add the Editor role to your service account, by going to IAM, Permissions for Project, as it does not seem possible to add this permission by editing the Service Account.
Use the following to convert a timestamp to a date in Linux bash
date -d @1636995741 Mo 15 Nov 2021 18:02:21 CET
To find your current resolution in a Linux shell you can use:
xdpyinfo | grep dim
dimensions: 3840×3600 pixels (1015×951 millimeters)
To use OR when you are doing a grep search use the \| characters to separate the items you are searching for.
cat text_to_search_in | grep 'first\|second\|third'
When you have two pods with different labels, let’s say one with two labels a=something and b=other, and the second one with label b=other, when you use kubectl to get them there is a difference in the way that the -l selector is used.
So using kubectl -n namespace get pods -l a=something -l b=other it will give you back both pods as it works as an OR operator.
If you wanted to get only the first one that has both labels, but not the second, you would need to use it as in kubectl -n namespace get pods -l a=something,b=other.
In other words the comma separator acts as a logical AND operator in selecting the labels.
There are different ways of using the json(b) operators in a PostgreSQL column.
The differences between two of them (->) and (->>) are described below:
‘[1,2,3]’::json->2 returns “2”
‘[1,2,3]’::json->>2 returns 2
There is a google Admin toolbox that lets you check your domain’s MX records.
This can be found here: https://toolbox.googleapps.com/apps/checkmx/
You want to update your dns resolution locally after some change in DNS.
You want to do this because your local dns cache still holds the old information about the domain. For example using your local dns and the google one returns two different results
host changed_domain.com returns the old ip host changed_domain.com 8.8.8.8 returns the new ip.
Check your systemd-resolved is active:
sudo systemctl is-active systemd-resolved active
Get some statistics:
sudo systemd-resolve --statistics
Transactions
Current Transactions: 0
Total Transactions: 38818
Cache
Current Cache Size: 73
Cache Hits: 21120
Cache Misses: 19745
DNSSEC Verdicts
Secure: 0
Insecure: 0
Bogus: 0
Indeterminate: 0
Flush the cache (make the Current Cache Size above 0)
sudo systemd-resolve --flush-caches
Check the cache again (should be 0 now):
sudo systemd-resolve --statistics
ransactions
Current Transactions: 0
Total Transactions: 38818
Cache
Current Cache Size: 0
Cache Hits: 21120
Cache Misses: 19745
DNSSEC Verdicts
Secure: 0
Insecure: 0
Bogus: 0
Indeterminate: 0Information taken from https://www.techrepublic.com/article/how-to-flush-the-dns-cache-on-linux/
To show all events on a specific kubernetes namespace ordered by date use the following:
kubectl -n namespace_name get events --sort-by='.metadata.creationTimestamp'