All Questions
Tagged with kubernetes etcd
48
questions
0
votes
0
answers
45
views
kubernetes etcd failed to publish local member to cluster through raft
Environment Background:
kubernetes configured 3 master and 3 worker node
Kubernetes is configured component by component following https://github.com/kelseyhightower/kubernetes-the-hard-way.
...
- 101
0
votes
0
answers
308
views
RKE2 error- Waiting for API server to become available Waiting to retrieve kube-proxy configuration; server is not ready
Issue 1
In the high-availability RKE2 Kubernetes cluster, I have provisioned a single load balancer (1LB) and three master nodes. Initially, all components were functioning as expected. However, ...
0
votes
0
answers
813
views
context deadline exceeded when deleting a etcd member
I have an unhealthy etcd cluster because a member that failed to join. That member doesn't exist and etcd stuck in selecting a leader.
I.e., there were a cluster with 3 nodes, one tried to join but ...
- 101
0
votes
1
answer
872
views
Kubernetes component status reports etcd as unhealthy
I have a 3 node kube control network setup with etcd, kube-apiserver, kube-control-manager and kube-scheduler running. When I check the status of the components it says etcd is unhealthy, but etcd ...
- 113
3
votes
2
answers
821
views
What exactly is Kubernetes API datastore?
THis page mentioned Kubernetes API datastore -- https://projectcalico.docs.tigera.io/getting-started/kubernetes/flannel/flannel -- and it seems to suggest that Kubernetes API datastore is a ...
- 141
1
vote
3
answers
4k
views
kubernetes: how to check pod IP range allocated to node
Every node in a kubernetes cluster has a dedicated range of IP addresses that it can allocate to the pods.
How can one check what that IP range is?
4
votes
2
answers
2k
views
All kube-system pods keep crashing, etcd receives sigterm
I'm trying to set up an on-premises Kubernetes cluster. For starters I used kubeadm to initialize my control plane on one node. But all kube-system pods constantly crash. I took a deep look into the ...
- 143
1
vote
2
answers
502
views
ETCD restore granularity
I'm studying some backup and restore solutions for Kubernetes and Openshift, typically with Velero. So, I'm not familiar with ETCD backups, but I would like to ask about the granularity level of etcd ...
- 11
0
votes
0
answers
2k
views
Changed IP addresses of etcd nodes. How to restart cluster?
I have a k8s cluster set up using 'hardway' a while ago. I've recently changed my network around and needed to set new IPs for the controller nodes (which are also the clustered etcd hosts).
I've ...
- 354
1
vote
0
answers
5k
views
Error from server: etcdserver: request timed out - error after etcd backup and restore
I have done the etcd backup and then a restore on the same cluster and now I'm having these issues where I can list resources but I can't create or delete.
It's a 1 master and 2 workers setup , ...
- 121
1
vote
0
answers
1k
views
ETCD snapshots causing etcdserver: leader changed
For a while now we've experienced regular errors from operations on kube API in AKS resulting in etcdserver: leader changed message. From what we've learned there is an ETCD snapshot performed every ...
0
votes
0
answers
730
views
Clean install of Kubernetes on Raspberry Pi doesn't work
I'm trying to do a clean install of Kubernetes 1.23.x on a cluster of four Raspberry Pis, each running the x64 version of Raspberry Pi OS, however I am running into a major snag as soon as I try and ...
- 719
1
vote
2
answers
4k
views
etcdctl endpoint health --> unhealty?
If I run etcdctl it hangs. If I use --debug=true I see:
root@k8scp:~# kubectl exec -n kube-system -it etcd-k8scp sh
sh-5.1# ETCDCTL_API=3 etcdctl --debug=true endpoint health
{"level":&...
- 3,893
0
votes
1
answer
211
views
etcdctl: unknown command "save" for "etcdctl"
I entered the etcd container:
kubectl -n kube-system exec -it etcd-k8scp -- sh
The I try to backup the container like explained in the K8s docs
ETCDCTL_API=3 etcdctl --endpoints $ENDPOINT snapshot ...
- 3,893
0
votes
1
answer
104
views
How to detect traffic change and trigger GitLab pipeline?
We have two etcd clusters running in Kubernetes one act as primary(A) and the second one act as backup(B). We also have etcdctl make-mirror in place between these two clusters, now the problem is if ...
- 101
2
votes
0
answers
334
views
Kubernetes on Flatcar Linux will not start up kube API server after a reboot of the master node
Thank you for reading and taking your time to review this problem.
I have a problem using my Kubernetes cluster.
It is running Flatcar Linux, made by Kinvolk, recently acquired by Microsoft. I have ...
- 91
0
votes
0
answers
2k
views
How to fix etcd within a kuberentes cluster?
I have a bare-metal (kubeadm) kubernetes cluster that's really unstable, and I traced it back to an etcd issue.
From the etcd pod's description I get:
Image: k8s.gcr.io/etcd:3.4.13-0
Liveness: ... #...
- 301
1
vote
0
answers
651
views
How to spin up a ETCD docker container and restore a backup obtained from a kubernetes ETCD Cluster node?
I am trying to spin up a ETCD node in docker and restore a backup obtained from the Kubernetes Cluster node.
ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 --user=root:'root' snapshot save ...
2
votes
0
answers
806
views
Kubernetes V1.19.13 - kubeapi servers not able connecting to different etcd database
I have upgraded Kubernets cluster ( 3 master, 3 etcd servers database) from 1.18 to v1.19.13 and ETCD to 3.4.13. since than API servers are not stable, keep switching different etcd server, because of ...
- 243
1
vote
1
answer
1k
views
ETCD Cluster configuration for Kubernetes: Which one should be considered?
I would like to know how to deploy a ETCD cluster for Kubernetes.
It seems like there are two different documentation and I don't know which one must be considered or the impact of each of them.
From ...
- 123
0
votes
1
answer
6k
views
Kubernetes: kubeadm join fails in private network
I'm trying to set up a HA Kubernetes cluster on Hetzner Cloud following this guide. I've created 6 servers, 3 control plane hosts and 3 workers. When trying to use kubeadm to join the second server to ...
- 11
4
votes
1
answer
1k
views
How can we modify the heartbeat synchronization time of the etcd cluster on Kubernetes
I want to modify heartbeat-interval of embedded etcd cluster running on kubernetes, I know while installation we can do with kubeadm extraargs but how to do in running cluster?
Before modifying I want ...
- 190
0
votes
2
answers
4k
views
ETCD database cluster certificate renewal for Kubernets external database setup
I have deployed 3 node external ETCD database (etcdctl version: 3.4.7) cluster for my Kubernetes v1.18.6 cluster using etcdadm tool. my certificate is expring in couple of months.
I believe kubeadm ...
- 243
1
vote
3
answers
13k
views
Kubernetes OCI runtime exec failed - starting container process caused "exec: \"etcdctl\": executable file not found in $PATH": unknown
Background
Created a fresh Kubernetes cluster using kubeadm init --config /home/kube/kubeadmn-config.yaml --upload-certs and then joining the 2nd control plane node by running the below.
kubeadm join ...
- 71
0
votes
1
answer
886
views
Kubernetes API: Compare and update config map key
Etcd has a concept of Atomic Compare-and-Update by comparing the key's value before executing an update. I'd like to use this feature for updating a ConfigMap in my Kubernetes cluster. I'd like to ...
- 267
0
votes
2
answers
150
views
Upgrade multi etcd cluster running inside docker container
Currently my k8s cluster is on v1.16.x and I want to upgrade it to v1.17.x for which ETCD has to be upgraded to 3.4 (currently 3.3). My setup is bit complex as I'm running ETCD outside the master ...
- 101
0
votes
0
answers
1k
views
Kubernetes etcd panic: store.keyindex: put with unexpected smaller revision
After an ungraceful shutdown of our Kubernetes cluster, the API server didn't start working. After some investigation, I found the following errors in each etcd member on each node.
How can I recover ...
- 103
2
votes
2
answers
5k
views
Kubernetes - kubeadm join - Connection refused after new control plane joined
Issue
I am trying to join a second control-plane node to a K8S cluster. The first node has a IP of 10.1.50.4 where the second node has a IP of 10.1.50.5. There is a load balancer Virtual IP for the ...
- 320
3
votes
0
answers
1k
views
k3s without HA: how to switch master node?
Rancher documentation on k3s is quite nice and its HA support (both with external DB or embedded etcd) look nice, but I don't want/need an HA setup.
In case my master node fails, I don't mind having ...
- 123
0
votes
1
answer
3k
views
Error response from daemon: {“message”:“No such container: kubelet”}
When adding a new node to a Kubernetes cluster I end up with this error :
+ docker start kubelet
Error response from daemon: {"message":"No such container: kubelet"}
Error: failed ...
- 1
0
votes
0
answers
630
views
ETCD client connection to etcd servers from k8s api server issue
We expect the following issue with etcd cluster. We generated certificate with the following configuration:
{
"CN": "client",
"hosts": [""],
"...
1
vote
1
answer
4k
views
TLS handshake issues with etcd
We are using external etcd cluster for k8s cluster. We connected master to this etcd server but receive
"tls: first record does not look like a TLS handshake"
How to fix this issues? (for ...
1
vote
2
answers
5k
views
How to recover from master failure in kubernetes
I have three nodes multi-master kubernetes(1.17.3) cluster(Stacked control plane and etcd nodes),
11.11.11.1 - master1
11.11.11.2 - master2
11.11.11.3 - master3
So before going to productions, I am ...
- 190
2
votes
1
answer
457
views
Why do kubernetes kube-api server need etcd-keyfile and kubelet-client-key
As I understand kube-api server acts as a client when communicating with ETCD and Kubelet. Both ETCD and Kubelet act as servers for kube-api. With secure environment (two way SSL authentication), kube-...
- 123
0
votes
1
answer
2k
views
Include own/external etcd cluster in kubeadm init
I have a running etcd cluster with five members (Own etcd cluster for Kubernetes). How can I include this in the kubeadm init command? My idea is that I generate the configuration, edit it manually ...
- 564
1
vote
2
answers
564
views
Own etcd cluster for Kubernetes
I want to build my own Kubernetes cluster across two locations (300 km distance) and integrate it into GitLab.
Let me list my ideas. My question is if I have a mistake in my thinking somewhere and ...
- 564
0
votes
1
answer
795
views
Installing kubernetes with external etcd - calico problems
I faced multiple problems during installation of k8s multimaster cluster with external etcd. I did it before twice, on other sites, successfully, but this time I need help.
calico was installed from ...
- 115
0
votes
1
answer
978
views
kube-calico bird: Mesh_172_26_178_195: Socket error: bind: Address not available
Issue appears when kube-calico service on node trying to connect master: Dec 17 12:03:41 a docker[27052]: bird: Mesh_47_105_189_58: Socket error: bind: Address not available Dec 17 12:03:41 a docker[...
3
votes
1
answer
5k
views
missing '=' etcd when defining service file
I'm struggling while following Kelsey Hightower's "Kubernetes the Hard Way" tutorial. I've gone off script, because I'm trying to bootstrap k8s on a local server.
I've got the point where I'm ...
- 61
0
votes
1
answer
652
views
Is there a way to determine to which etcd server the Kubernetes-apiserver is communicating with?
In the following scenario, is there a way to determine to which etcd server the Kubernetes-apiserver is communicating with??
Let's say we have 3 Master nodes with an external load balancer and 3 etcd'...
0
votes
1
answer
231
views
Does etcd resources are encrypted on gke master nodes?
I do not find any information on etcd database managed by google on kubernetes master nodes. I see how resources (pod/nodes/...) communicates, but I don't know if the data are encrypted before being ...
13
votes
1
answer
2k
views
Graceful shutdown of Kubernetes cluster
We have a 4 node Kubernetes cluster, installed using Juju 2.0 and the official canonical Kubernetes charm. The sole purpose of this very local and private installation is development and testing.
One ...
- 131
1
vote
1
answer
4k
views
kubelet not able to update node status
kubernetes node status reports as below.
root@csp-nso-server78:~# kubectl get nodes 10.213.5.78
NAME STATUS AGE
10.213.5.78 NotReady 1h
The kubelet logs show below error
E0812 11:...
- 151
0
votes
1
answer
304
views
etcd & kubernetes: No connection possible to etcd instance
currently I am following the k8s guide "from scratch" (found here: LINK, up to this point everything seems pretty clear, though I start without doing all that certificate stuff.
I started kubelet on ...
- 131
0
votes
1
answer
852
views
OpenShift Origin asks for credentials
I had a cluster OpenShift with a master and a node. Today, it doesn't work anymore, OpenShift continously asks me the credentials, the following is the command and the output:
[root@openshift-master ~...
- 161
1
vote
3
answers
2k
views
Kubernetes, flannel and exposing services
I have a kubernetes setup running nicely, but I can't seem to expose services externally. I'm thinking my networking is not set up correctly:
kubernetes services addresses: --service-cluster-ip-range=...
- 626
1
vote
1
answer
276
views
Kubernetes service etcd références
If someone with quite good kubernetes's services understanding could confirm me that once you require a new service to be created kubernetes push a reference of it on the etcd database and what is the ...
- 975
3
votes
1
answer
2k
views
PostgreSQL failover with Kubernetes
I've got master slave replication working with Kubernetes, but would now like to implement failover. I have pods running with the service=postgresql and role=master or role=slave roles. When the ...
