PI4 Stories¶
Raspberry Pi 4 cluster Series - Keep your Operating System updated¶
When you login on one of your nodes you often see a message like the following:
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-1026-raspi aarch64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Thu 28 Jan 2021 12:05:56 PM CET
System load: 0.55
Usage of /: 18.3% of 28.40GB
Memory usage: 14%
Swap usage: 0%
Temperature: 34.6 C
Processes: 157
Users logged in: 1
IPv4 address for cni0: 10.42.1.1
IPv4 address for docker0: 172.17.0.1
IPv4 address for eth0: 192.168.0.205
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Simple, hardened, Kubernetes for production, from RaspberryPi to DC.
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62 updates can be installed immediately.
0 of these updates are security updates.
To see these additional updates run: apt list --upgradable
Last login: Thu Jan 28 12:01:54 2021 from 192.168.0.41
Pay attention to the amount of packages ready to update:
See line "62 updates can be installed immediately"
Doing that for a bunch of systems is tiring/boring so let get this done via ansible. First we need to download package information from all configured sources.
$ ansible pi -m shell -b -a "apt update"
n1 | SUCCESS | rc=0 >>
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [114 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease [101 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease [109 kB]
Fetched 324 kB in 2s (187 kB/s)
Reading package lists...
Building dependency tree...
Reading state information...
49 packages can be upgraded. Run 'apt list --upgradable' to see them.
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
...
n5 | SUCCESS | rc=0 >>
Hit:1 http://ports.ubuntu.com/ubuntu-ports focal InRelease
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-updates InRelease [114 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-backports InRelease [101 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports focal-security InRelease [109 kB]
Fetched 324 kB in 2s (196 kB/s)
Reading package lists...
Building dependency tree...
Reading state information...
58 packages can be upgraded. Run 'apt list --upgradable' to see them.
WARNING: apt does not have a stable CLI interface. Use with caution in scripts
And, finally, to automate the installation of the packages:
$ ansible pi -m shell -b -a "apt --yes upgrade"