Knowledge Base
Recipes for common configuration tasks with Talos Linux.
Disabling GracefulNodeShutdown on a node
Talos Linux enables Graceful Node Shutdown Kubernetes feature by default.
If this feature should be disabled, modify the kubelet part of the machine configuration with:
machine:
kubelet:
extraArgs:
feature-gates: GracefulNodeShutdown=false
extraConfig:
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
Generating Talos Linux ISO image with custom kernel arguments
Pass additional kernel arguments using --extra-kernel-arg flag:
$ docker run --rm -i ghcr.io/siderolabs/imager:v1.1.1 iso --arch amd64 --tar-to-stdout --extra-kernel-arg console=ttyS1 --extra-kernel-arg console=tty0 | tar xz
2022/05/25 13:18:47 copying /usr/install/amd64/vmlinuz to /mnt/boot/vmlinuz
2022/05/25 13:18:47 copying /usr/install/amd64/initramfs.xz to /mnt/boot/initramfs.xz
2022/05/25 13:18:47 creating grub.cfg
2022/05/25 13:18:47 creating ISO
ISO will be output to the file talos-<arch>.iso in the current directory.
Logging Kubernetes audit logs with loki
If using loki-stack helm chart to gather logs from the Kubernetes cluster, you can use the helm values to configure loki-stack to log Kubernetes API server audit logs:
promtail:
extraArgs:
- -config.expand-env
# // this is required so that the promtail process can read the kube-apiserver audit logs written as `nobody` user
containerSecurityContext:
capabilities:
add:
- DAC_READ_SEARCH
extraVolumes:
- name: audit-logs
hostPath:
path: /var/log/audit/kube
extraVolumeMounts:
- name: audit-logs
mountPath: /var/log/audit/kube
readOnly: true
config:
snippets:
extraScrapeConfigs: |
- job_name: auditlogs
static_configs:
- targets:
- localhost
labels:
job: auditlogs
host: ${HOSTNAME}
__path__: /var/log/audit/kube/*.log