Exercise 3.3: Finish Cluster Setup - Problem with coreDNS
Hello folks,
I am following Ex 3.3 step 6 to determine if the DNS and Calico pods are ready for use, and I am getting an error as below. Any ideas are welcome please!
~$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-node-bdqnk 1/2 CrashLoopBackOff 1905 6d18h
kube-system calico-node-q7xxq 1/2 CrashLoopBackOff 753 2d16h
kube-system calico-node-z9hzj 1/2 Error 1904 6d18h
kube-system coredns-86c58d9df4-677v8 0/1 ContainerCreating 0 13m
kube-system coredns-86c58d9df4-t7b2h 0/1 ContainerCreating 0 13m
kube-system etcd-cicd 1/1 Running 0 6d18h
kube-system kube-apiserver-cicd 1/1 Running 0 6d18h
kube-system kube-controller-manager-cicd 1/1 Running 0 6d18h
kube-system kube-proxy-6bq6x 1/1 Running 0 2d16h
kube-system kube-proxy-jvk7w 1/1 Running 0 6d18h
kube-system kube-proxy-rkvms 1/1 Running 0 6d18h
kube-system kube-scheduler-cicd 1/1 Running 0 6d18h
Comments
-
Hello,
There are a few reasons the pods are not fully running. It depends on how far along in the labs you may be as there are some other steps to run in order that you have two nodes and both are willing to run all pods.
When you ran kubeadm init --kubernetes-version 1.12.1 --pod-network-cidr 192.168.0.0/16 did you have any errors?
Did you find any errors when you did the kubeadm join from the worker node?
Were you able to remove the taints on both nodes?Regards,
0 -
Hi, some of these errors are expected in step 6, then step 7 helps with fixing them.
Are your nodes local VMs or cloud VM instances?
-Chris0 -
I have a similar problem. coreDNS is not starting up.
I am running the two nodes on bare metal. I am still in LAB 2.1 but everything installed and set up without error.kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE default firstpod-7d88d7b6cf-bj8js 1/1 Running 0 10m kube-system calico-etcd-wr2cf 1/1 Running 3 13h kube-system calico-kube-controllers-57c8947c94-g2lbc 1/1 Running 3 13h kube-system calico-node-lsjm9 2/2 Running 17 13h kube-system calico-node-zhgnd 2/2 Running 9 13h kube-system coredns-576cbf47c7-56thg 0/1 CrashLoopBackOff 53 13h kube-system coredns-576cbf47c7-nmznf 0/1 CrashLoopBackOff 53 13h kube-system etcd-nuc1 1/1 Running 4 13h kube-system kube-apiserver-nuc1 1/1 Running 4 13h kube-system kube-controller-manager-nuc1 1/1 Running 3 13h kube-system kube-proxy-ct89j 1/1 Running 3 13h kube-system kube-proxy-lbdxr 1/1 Running 5 13h kube-system kube-scheduler-nuc1 1/1 Running 3 13h
When I describe the coreDNS pod I have the followin in the logs:
Warning FailedMount 83m kubelet, nuc1 MountVolume.SetUp failed for volume "coredns-token-zwdp6" : couldn't propagate object cache: timed out waiting for the condition Normal SandboxChanged 83m (x2 over 83m) kubelet, nuc1 Pod sandbox changed, it will be killed and re-created. Normal Pulled 81m (x4 over 83m) kubelet, nuc1 Container image "k8s.gcr.io/coredns:1.2.2" already present on machine Normal Created 81m (x4 over 83m) kubelet, nuc1 Created container Normal Started 81m (x4 over 83m) kubelet, nuc1 Started container Warning BackOff 48m (x166 over 83m) kubelet, nuc1 Back-off restarting failed container Normal SandboxChanged 40m (x2 over 41m) kubelet, nuc1 Pod sandbox changed, it will be killed and re-created. Normal Pulled 39m (x4 over 40m) kubelet, nuc1 Container image "k8s.gcr.io/coredns:1.2.2" already present on machine Normal Created 39m (x4 over 40m) kubelet, nuc1 Created container Normal Started 39m (x4 over 40m) kubelet, nuc1 Started container Warning BackOff 59s (x194 over 40m) kubelet, nuc1 Back-off restarting failed container
0 -
@bryonbaker ,
You can try to delete the 2 coredns pods, and they will be re-created.
Are you in Lab 2.1 of LFD259?
Thanks,
-Chris0
Categories
- All Categories
- 218 LFX Mentorship
- 218 LFX Mentorship: Linux Kernel
- 791 Linux Foundation IT Professional Programs
- 353 Cloud Engineer IT Professional Program
- 178 Advanced Cloud Engineer IT Professional Program
- 82 DevOps Engineer IT Professional Program
- 147 Cloud Native Developer IT Professional Program
- 137 Express Training Courses
- 137 Express Courses - Discussion Forum
- 6.2K Training Courses
- 47 LFC110 Class Forum - Discontinued
- 71 LFC131 Class Forum
- 42 LFD102 Class Forum
- 226 LFD103 Class Forum
- 18 LFD110 Class Forum
- 38 LFD121 Class Forum
- 18 LFD133 Class Forum
- 7 LFD134 Class Forum
- 18 LFD137 Class Forum
- 71 LFD201 Class Forum
- 4 LFD210 Class Forum
- 5 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 2 LFD233 Class Forum
- 4 LFD237 Class Forum
- 24 LFD254 Class Forum
- 697 LFD259 Class Forum
- 111 LFD272 Class Forum
- 4 LFD272-JP クラス フォーラム
- 12 LFD273 Class Forum
- 148 LFS101 Class Forum
- 1 LFS111 Class Forum
- 3 LFS112 Class Forum
- 2 LFS116 Class Forum
- 4 LFS118 Class Forum
- LFS120 Class Forum
- 7 LFS142 Class Forum
- 5 LFS144 Class Forum
- 4 LFS145 Class Forum
- 2 LFS146 Class Forum
- 3 LFS147 Class Forum
- 1 LFS148 Class Forum
- 15 LFS151 Class Forum
- 2 LFS157 Class Forum
- 29 LFS158 Class Forum
- 7 LFS162 Class Forum
- 2 LFS166 Class Forum
- 4 LFS167 Class Forum
- 3 LFS170 Class Forum
- 2 LFS171 Class Forum
- 3 LFS178 Class Forum
- 3 LFS180 Class Forum
- 2 LFS182 Class Forum
- 5 LFS183 Class Forum
- 31 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 3 LFS201-JP クラス フォーラム
- 18 LFS203 Class Forum
- 134 LFS207 Class Forum
- 2 LFS207-DE-Klassenforum
- 1 LFS207-JP クラス フォーラム
- 302 LFS211 Class Forum
- 56 LFS216 Class Forum
- 52 LFS241 Class Forum
- 48 LFS242 Class Forum
- 38 LFS243 Class Forum
- 15 LFS244 Class Forum
- 2 LFS245 Class Forum
- LFS246 Class Forum
- 49 LFS250 Class Forum
- 2 LFS250-JP クラス フォーラム
- 1 LFS251 Class Forum
- 153 LFS253 Class Forum
- 1 LFS254 Class Forum
- 1 LFS255 Class Forum
- 7 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.3K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 118 LFS260 Class Forum
- 159 LFS261 Class Forum
- 42 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 24 LFS267 Class Forum
- 22 LFS268 Class Forum
- 30 LFS269 Class Forum
- LFS270 Class Forum
- 202 LFS272 Class Forum
- 2 LFS272-JP クラス フォーラム
- 1 LFS274 Class Forum
- 4 LFS281 Class Forum
- 9 LFW111 Class Forum
- 259 LFW211 Class Forum
- 181 LFW212 Class Forum
- 13 SKF100 Class Forum
- 1 SKF200 Class Forum
- 1 SKF201 Class Forum
- 796 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 103 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 758 Linux Distributions
- 82 Debian
- 67 Fedora
- 17 Linux Mint
- 13 Mageia
- 23 openSUSE
- 148 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 353 Ubuntu
- 468 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 93 Linux Security
- 78 Network Management
- 102 System Management
- 47 Web Management
- 63 Mobile Computing
- 18 Android
- 33 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 371 Off Topic
- 114 Introductions
- 174 Small Talk
- 22 Study Material
- 805 Programming and Development
- 303 Kernel Development
- 484 Software Development
- 1.8K Software
- 261 Applications
- 183 Command Line
- 3 Compiling/Installing
- 987 Games
- 317 Installation
- 97 All In Program
- 97 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)