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Test API endpoint with netcat

Do you need a simple way to validate that an API endpoint is responsive, but you don't want to use curl? There is a simple way to validate the endpoint with nc, producing an output that can be redirected to a logfile and parsed later: URL=$1 PORT=$2 while true; do     RESULT=$(nc -vz $URL $PORT 2>&1)     DATE=$(date)     echo $DATE $RESULT     sleep 1 done You can all this script with the API URL as first parameter, and API port as the second. netcat will be accessing to that endpoint and will report the results, detecting when the API is down. We also can output the date to have a reference when failures are detected. The produced output will be something like: vie jun 26 08:19:28 UTC 2020 Ncat: Version 7.70 ( https://nmap.org/ncat ) Ncat: Connected to 192.168.111.3:6443. Ncat: 0 bytes sent, 0 bytes received in 0.01 seconds. vie jun 26 08:19:29 UTC 2020 Ncat: Version 7.70 ( https://nmap.org/ncat ) Ncat: Connec...

Enable UEFI PXE boot in Supermicro SYS-E200

When provisioning my Supermicro SYS-E200-8D machines (X10 motherboard), i had the need to enable UEFI boot mode, and provision through PXE. This may seem straightforward, but there is a set of BIOS settings that need to be changed in order to enable it. First thing is to enable EFI on LAN , and enable Network Stack. To do that, enter into BIOS > Advanced > PCIe/PCI/PnP configuration and check that your settings match the following: See that PCI-E have EFI firmware loaded. Same for Onboard LAN OPROM and Onboard Video OPROM. And UEFI Network stack is enabled , as well as IPv4 PXE/IPv6 PXE support. Next thing is to modify boot settings. The usual boot order for PXE is to first add hard disk and second PXE network . The PXE tools (for example Ironic) will set a temporary boot order for PXE (one time) to enable the boot from network, but then the reboot will be done from hard disk. So be sure that your boot order matches the following: See that the first order is hard d...

Akraino KNI FOSDEM talk

Akraino KNI FOSDEM talk The first weekend of Feb 2020 I attended  FOSDEM 2020 , to present a talk about Akraino and KNI Blueprint family . Following there are the slides and the recorded demo that I showed.   Google slides Recorded demo   There is also the link for the recorded session: https://fosdem.org/2020/schedule/event/akraino_edge_kni_blueprint/