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Where can I find the default arguments supplied to the internal Kublet Service in k3s?

Y
yajahira last edited by

If I want to find the default-arguments to the internal Kublet service, where can I find these documented?
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R
Rossere last edited by
I wasn't able to find them documented, but I did find them in the https://github.com/k3s-io/k3s/blob/491aa11e1068cc6605598822dc456ef1fc18f4f1/pkg/daemons/agent/agent_linux.go#L67 (note there are difference options for https://github.com/k3s-io/k3s/blob/491aa11e1068cc6605598822dc456ef1fc18f4f1/pkg/daemons/agent/agent_windows.go#L59 )

You can see them here,
```
argsMap := map[string]string{
    "healthz-bind-address":         bindAddress,
    "read-only-port":               "0",
    "cluster-domain":               cfg.ClusterDomain,
    "kubeconfig":                   cfg.KubeConfigKubelet,
    "eviction-hard":                "imagefs.available
```
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Your ip show does mention 10.42.0.0/32, 10.42.0.200/32. No traces of 10.42.0.232, though. From LAN/outside SDN: can you connect any TCP port, or ping that address? anything that answers? I suspect nothing would. In addition to that Traefik rule, you mentioned creating a Service ... Are you sure you did it right? Look at kubectl get svc -A | grep 10.42.0.200, that would give you a working example -- something with an externalIP/externalIPs set, or some status.loadbalancer.ingress array ... configuration may vary, depending on how external IPs were implemented and kube version, .. And by the way, creating such Services: are you pointing to your application directly, or is it sent to Traefik instead? Assuming the latter: are you sure Traefik actually listens on such port. Also, while Traefik should be able to process TCP or UDP trafic, unless you can easily have several Services & backends accessible through the same proto/port combination: involving your ingress controller here might not be necessary.
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My problem was basically that I had multiple default routes, from ip route default via 172.16.42.1 dev ens5 proto dhcp src 172.16.42.135 metric 100 default via 172.16.42.1 dev ens3 proto dhcp src 172.16.42.95 metric 100 default via 10.2.64.1 dev ens4 proto dhcp src 10.2.67.51 metric 100 10.2.64.0/19 dev ens4 proto kernel scope link src 10.2.67.51 169.254.169.254 via 172.16.42.2 dev ens5 proto dhcp src 172.16.42.135 metric 100 169.254.169.254 via 172.16.42.2 dev ens3 proto dhcp src 172.16.42.95 metric 100 169.254.169.254 via 10.2.64.11 dev ens4 proto dhcp src 10.2.67.51 metric 100 172.16.42.0/24 dev ens5 proto kernel scope link src 172.16.42.135 172.16.42.0/24 dev ens3 proto kernel scope link src 172.16.42.95 The cause of this was not using no_gateway = true in my Terraform stanza, resource "openstack_networking_subnet_v2" "subnet_project" { name = "subnet_project" network_id = openstack_networking_network_v2.net_project.id cidr = "172.16.42.0/24" ip_version = 4 } Without no_gateway = true. I can fix this by lowering the metric on the default route on the host, sudo ip route replace default via 10.2.64.1 dev ens4 metric 90 Which will add a new route to this, default via 10.2.64.1 dev ens4 metric 90 Now running nslookup google.com as in the question will work fine, I can re-break it with sudo ip route del default via 10.2.64.1 dev ens4 metric 90 Other diagnostics These are taken before bringing up k3s. My ip -o addr shows, 1: lo inet 127.0.0.1/8 scope host lo\ valid_lft forever preferred_lft forever 1: lo inet6 ::1/128 scope host \ valid_lft forever preferred_lft forever 2: ens3 inet 172.16.42.95/24 brd 172.16.42.255 scope global dynamic ens3\ valid_lft 40534sec preferred_lft 40534sec 2: ens3 inet6 fe80::f816:3eff:fecd:6722/64 scope link \ valid_lft forever preferred_lft forever 3: ens4 inet 10.2.67.51/19 brd 10.2.95.255 scope global dynamic ens4\ valid_lft 24333sec preferred_lft 24333sec 3: ens4 inet6 2620:0:28a4:4140:f816:3eff:fed2:72c7/64 scope global dynamic mngtmpaddr noprefixroute \ valid_lft 2591979sec preferred_lft 604779sec 3: ens4 inet6 fe80::f816:3eff:fed2:72c7/64 scope link \ valid_lft forever preferred_lft forever 4: ens5 inet 172.16.42.135/24 brd 172.16.42.255 scope global dynamic ens5\ valid_lft 40534sec preferred_lft 40534sec 4: ens5 inet6 fe80::f816:3eff:fe3d:cde8/64 scope link \ valid_lft forever preferred_lft forever And ip link shows 1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: ens3: mtu 1492 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether fa:16:3e:cd:67:22 brd ff:ff:ff:ff:ff:ff 3: ens4: mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether fa:16:3e:d2:72:c7 brd ff:ff:ff:ff:ff:ff 4: ens5: mtu 1492 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether fa:16:3e:3d:cd:e8 brd ff:ff:ff:ff:ff:ff
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No, do not change permissions of /etc/rancher/k3s/k3s.yaml First set up your an environmental variable for KUBECONFIG=~/.kube/config. export KUBECONFIG=~/.kube/config Then let's generate the file at that location. https://github.com/k3s-io/k3s/issues/389 . This is by-design. It should be owned by root and set to 0600. Instead copy the config locally as https://devops.stackexchange.com/a/16014/18965 , mkdir ~/.kube 2> /dev/null sudo k3s kubectl config view --raw > "$KUBECONFIG" chmod 600 "$KUBECONFIG" You can add KUBECONFIG=~/.kube/config to your ~/.profile or ~/.bashrc to make it persist on reboot.
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Installing k3s and kubeapps Install k3s, ( https://rancher.com/docs/k3s/latest/en/installation/ ) curl -sfL https://get.k3s.io | sh - Add KUBECONFIG for user. ( https://devops.stackexchange.com/q/16043/18965 ) export KUBECONFIG=~/.kube/config mkdir ~/.kube 2> /dev/null sudo k3s kubectl config view --raw > "$KUBECONFIG" chmod 600 "$KUBECONFIG" Install Helm, ( https://helm.sh/docs/intro/install/ ) curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash Setup Kubeapps, ( https://kubeapps.dev/ ) Install Kubeapps helm repo add bitnami https://charts.bitnami.com/bitnami helm repo update helm install -n kubeapps --create-namespace kubeapps bitnami/kubeapps Configure Kubeapps kubectl create --namespace default serviceaccount kubeapps-operator kubectl create clusterrolebinding kubeapps-operator --clusterrole=cluster-admin --serviceaccount=default:kubeapps-operator cat <<EOF | kubectl apply -f - apiVersion: v1 kind: Secret metadata: name: kubeapps-operator-token namespace: default annotations: kubernetes.io/service-account.name: kubeapps-operator type: kubernetes.io/service-account-token EOF kubectl get --namespace default secret kubeapps-operator-token -o jsonpath='{.data.token}' -o go-template='{{.data.token | base64decode}}' && echo Play (note we have a slight modification with https://devops.stackexchange.com/a/16106/18965 ) kubectl port-forward -n kubeapps --address 0.0.0.0 svc/kubeapps 8080:80 Removal sudo k3s-uninstall.sh Remove helm, and caches sudo rm -rf /usr/local/bin/helm ~/.cache/helm /root/.cache/helm Remove logs sudo rm -rf /var/log/pods/ Your own cluster config/keys/kubeconfig sudo rm -rf ~/.kube
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created with: docker run -d -p 80:8080 -p 443:8443 jetty gives a start page as: Error 404 - Not Found. No context on this server matched or handled this request. Contexts known to this server are: Context Path Display Name Status LifeCycle __________________________________________________________________ [1]icon [2]Powered by Eclipse Jetty:// Server __________________________________________________________________ References 1. http://eclipse.org/jetty 2. http://eclipse.org/jetty
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i guess you mean a Deployment because service do not have any pods, and yes, you can use node affinity on a Deployment. you can find it here https://www.howtoforge.com/use-node-affinity-in-kubernetes/

Where can I find the default arguments supplied to the internal Kublet Service in k3s?

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