cloud engineer
by Ulysses
Here’s a little snippet of Bash code that waits for spacebar to be pressed to continue.
function spacebar { echo 'Press spacebar to continue. Press Ctrl-C to exit.' stty -echo > /dev/null until read -r -n 1 -t 0.001 && [ "$REPLY" = ' ' ]; do abc=''; done stty echo > /dev/null } echo 'Starting upgrade' spacebar |
function spacebar { echo 'Press spacebar to continue. Press Ctrl-C to exit.' stty -echo > /dev/null until read -r -n 1 -t 0.001 && [ "$REPLY" = ' ' ]; do abc=''; done stty echo > /dev/null } echo 'Starting upgrade' spacebar
Output
Starting upgrade Press spacebar to continue. Or Ctrl-C to exit. |
Starting upgrade Press spacebar to continue. Or Ctrl-C to exit.
If you press spacebar it will continue. Ctrl-C exits the program.
by Ulysses
Why would you choose Bare Metal Servers?
Advantages
– BMS are dedicated to a single organization
– Single tenant or dedicated host
– No sharing of hardware, storage, connection, bandwidth (noisy neighbor)
– There is no hypervisor layer
– No virtualization overhead
– OS is loaded straight to the server
– Results in higher performance
– Quality of hardware
– Compliance and security due to single tenant
– Flexible contract, billing options
Disadvantages
– Procurement could take weeks depending on hardware type
– And that goes for replacement hardware as well.
by Ulysses
Check mounted file systems using df. Displaying different options.
df df -h df -Th |
df df -h df -Th
To get rid tmpfs, run this.
df -Th| grep -Ev '(udev|tmpfs)' |
df -Th| grep -Ev '(udev|tmpfs)'
by Ulysses
Here’s how to extend an ext4 boot volume.
gcloud compute disks resize DISK_NAME --size DISK_SIZE |
gcloud compute disks resize DISK_NAME --size DISK_SIZE
Resize the file system. Example / is on sda3.
growpart /dev/sda 3 resize2fs /dev/sda3 |
growpart /dev/sda 3 resize2fs /dev/sda3
by Ulysses
How to look for an access key in AWS. Find the account.
$ aws sts get-access-key-info --access-key-id AKIA8XXXXXXXXXXXXXXX { "Account": "XXXXXXXXXXXX" } |
$ aws sts get-access-key-info --access-key-id AKIA8XXXXXXXXXXXXXXX { "Account": "XXXXXXXXXXXX" }
by Ulysses
How to create service account in GCP via Terraform.
provider "google" { project = "your_project_id" } resource "google_service_account" "service_account" { account_id = "your-service-account-name" display_name = "test service account built by terraform" } |
provider "google" { project = "your_project_id" } resource "google_service_account" "service_account" { account_id = "your-service-account-name" display_name = "test service account built by terraform" }
by Ulysses
Here’s a script to convert date to epoch time on Mac OS.
#!/bin/bash if [[ -z $1 ]]; then echo "Format: date2epoch.sh 2022/01/01-04:58:06" else echo "$1"; date -j -f date -j -f "%Y/%m/%d-%T" "$1" +"%s" fi |
#!/bin/bash if [[ -z $1 ]]; then echo "Format: date2epoch.sh 2022/01/01-04:58:06" else echo "$1"; date -j -f date -j -f "%Y/%m/%d-%T" "$1" +"%s" fi
Result
$ ./date2epoch.sh 2022/08/31-22:00:00 2022/08/31-22:00:00 1661997600 |
$ ./date2epoch.sh 2022/08/31-22:00:00 2022/08/31-22:00:00 1661997600
by Ulysses
Connect to your CloudShell environment from your terminal.
$ gcloud cloud-shell ssh Welcome to Cloud Shell! Type "help" to get started. first.last@cloudshell $ first.last@cloudshell $ |
$ gcloud cloud-shell ssh Welcome to Cloud Shell! Type "help" to get started. first.last@cloudshell $ first.last@cloudshell $
Once logged in, you can set your project.
first.last@cloudshell $ gcloud config set project $PROJECT_ID |
first.last@cloudshell $ gcloud config set project $PROJECT_ID