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Update samples to use containerd

This commit is contained in:
Shannon Kularathna 2022-02-17 17:22:55 -05:00
parent 35f5f4ca01
commit b60aa414a0
1 changed files with 266 additions and 148 deletions
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414
content/en/docs/tasks/debug-application-cluster/debug-application-introspection.md
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@ -40,70 +40,77 @@ kubectl get pods
``` ```
```none ```none
NAME READY STATUS RESTARTS AGE NAME READY STATUS RESTARTS AGE
nginx-deployment-1006230814-6winp 1/1 Running 0 11s nginx-deployment-67d4bdd6f5-cx2nz 1/1 Running 0 13s
nginx-deployment-1006230814-fmgu3 1/1 Running 0 11s nginx-deployment-67d4bdd6f5-w6kd7 1/1 Running 0 13s
``` ```
We can retrieve a lot more information about each of these pods using `kubectl describe pod`. For example: We can retrieve a lot more information about each of these pods using `kubectl describe pod`. For example:
```shell ```shell
kubectl describe pod nginx-deployment-1006230814-6winp kubectl describe pod nginx-deployment-67d4bdd6f5-w6kd7
``` ```
```none ```none
Name: nginx-deployment-1006230814-6winp Name: nginx-deployment-67d4bdd6f5-w6kd7
Namespace: default Namespace: default
Node: kubernetes-node-wul5/10.240.0.9 Priority: 0
Start Time: Thu, 24 Mar 2016 01:39:49 +0000 Node: kube-worker-1/192.168.0.113
Labels: app=nginx,pod-template-hash=1006230814 Start Time: Thu, 17 Feb 2022 16:51:01 -0500
Annotations: kubernetes.io/created-by={"kind":"SerializedReference","apiVersion":"v1","reference":{"kind":"ReplicaSet","namespace":"default","name":"nginx-deployment-1956810328","uid":"14e607e7-8ba1-11e7-b5cb-fa16" ... Labels: app=nginx
Status: Running pod-template-hash=67d4bdd6f5
IP: 10.244.0.6 Annotations: <none>
Controllers: ReplicaSet/nginx-deployment-1006230814 Status: Running
IP: 10.88.0.3
IPs:
IP: 10.88.0.3
IP: 2001:db8::1
Controlled By: ReplicaSet/nginx-deployment-67d4bdd6f5
Containers: Containers:
nginx: nginx:
Container ID: docker://90315cc9f513c724e9957a4788d3e625a078de84750f244a40f97ae355eb1149 Container ID: containerd://5403af59a2b46ee5a23fb0ae4b1e077f7ca5c5fb7af16e1ab21c00e0e616462a
Image: nginx Image: nginx
Image ID: docker://6f62f48c4e55d700cf3eb1b5e33fa051802986b77b874cc351cce539e5163707 Image ID: docker.io/library/nginx@sha256:2834dc507516af02784808c5f48b7cbe38b8ed5d0f4837f16e78d00deb7e7767
Port: 80/TCP Port: 80/TCP
QoS Tier: Host Port: 0/TCP
cpu: Guaranteed State: Running
memory: Guaranteed Started: Thu, 17 Feb 2022 16:51:05 -0500
Ready: True
Restart Count: 0
Limits: Limits:
cpu: 500m cpu: 500m
memory: 128Mi memory: 128Mi
Requests: Requests:
memory: 128Mi cpu: 500m
cpu: 500m memory: 128Mi
State: Running Environment: <none>
Started: Thu, 24 Mar 2016 01:39:51 +0000
Ready: True
Restart Count: 0
Environment: <none>
Mounts: Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-5kdvl (ro) /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-bgsgp (ro)
Conditions: Conditions:
Type Status Type Status
Initialized True Initialized True
Ready True Ready True
PodScheduled True ContainersReady True
PodScheduled True
Volumes: Volumes:
default-token-4bcbi: kube-api-access-bgsgp:
Type: Secret (a volume populated by a Secret) Type: Projected (a volume that contains injected data from multiple sources)
SecretName: default-token-4bcbi TokenExpirationSeconds: 3607
Optional: false ConfigMapName: kube-root-ca.crt
QoS Class: Guaranteed ConfigMapOptional: <nil>
Node-Selectors: <none> DownwardAPI: true
Tolerations: <none> QoS Class: Guaranteed
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events: Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message Type Reason Age From Message
--------- -------- ----- ---- ------------- -------- ------ ------- ---- ------ ---- ---- -------
54s 54s 1 {default-scheduler } Normal Scheduled Successfully assigned nginx-deployment-1006230814-6winp to kubernetes-node-wul5 Normal Scheduled 34s default-scheduler Successfully assigned default/nginx-deployment-67d4bdd6f5-w6kd7 to kube-worker-1
54s 54s 1 {kubelet kubernetes-node-wul5} spec.containers{nginx} Normal Pulling pulling image "nginx" Normal Pulling 31s kubelet Pulling image "nginx"
53s 53s 1 {kubelet kubernetes-node-wul5} spec.containers{nginx} Normal Pulled Successfully pulled image "nginx" Normal Pulled 30s kubelet Successfully pulled image "nginx" in 1.146417389s
53s 53s 1 {kubelet kubernetes-node-wul5} spec.containers{nginx} Normal Created Created container with docker id 90315cc9f513 Normal Created 30s kubelet Created container nginx
53s 53s 1 {kubelet kubernetes-node-wul5} spec.containers{nginx} Normal Started Started container with docker id 90315cc9f513 Normal Started 30s kubelet Started container nginx
``` ```
Here you can see configuration information about the container(s) and Pod (labels, resource requirements, etc.), as well as status information about the container(s) and Pod (state, readiness, restart count, events, etc.). Here you can see configuration information about the container(s) and Pod (labels, resource requirements, etc.), as well as status information about the container(s) and Pod (state, readiness, restart count, events, etc.).
@ -203,18 +210,22 @@ kubectl get pod nginx-deployment-1006230814-6winp -o yaml
apiVersion: v1 apiVersion: v1
kind: Pod kind: Pod
metadata: metadata:
annotations: creationTimestamp: "2022-02-17T21:51:01Z"
kubernetes.io/created-by: | generateName: nginx-deployment-67d4bdd6f5-
{"kind":"SerializedReference","apiVersion":"v1","reference":{"kind":"ReplicaSet","namespace":"default","name":"nginx-deployment-1006230814","uid":"4c84c175-f161-11e5-9a78-42010af00005","apiVersion":"extensions","resourceVersion":"133434"}}
creationTimestamp: 2016-03-24T01:39:50Z
generateName: nginx-deployment-1006230814-
labels: labels:
app: nginx app: nginx
pod-template-hash: "1006230814" pod-template-hash: 67d4bdd6f5
name: nginx-deployment-1006230814-6winp name: nginx-deployment-67d4bdd6f5-w6kd7
namespace: default namespace: default
resourceVersion: "133447" ownerReferences:
uid: 4c879808-f161-11e5-9a78-42010af00005 - apiVersion: apps/v1
blockOwnerDeletion: true
controller: true
kind: ReplicaSet
name: nginx-deployment-67d4bdd6f5
uid: 7d41dfd4-84c0-4be4-88ab-cedbe626ad82
resourceVersion: "1364"
uid: a6501da1-0447-4262-98eb-c03d4002222e
spec: spec:
containers: containers:
- image: nginx - image: nginx
@ -231,42 +242,88 @@ spec:
cpu: 500m cpu: 500m
memory: 128Mi memory: 128Mi
terminationMessagePath: /dev/termination-log terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts: volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-4bcbi name: kube-api-access-bgsgp
readOnly: true readOnly: true
dnsPolicy: ClusterFirst dnsPolicy: ClusterFirst
nodeName: kubernetes-node-wul5 enableServiceLinks: true
nodeName: kube-worker-1
preemptionPolicy: PreemptLowerPriority
priority: 0
restartPolicy: Always restartPolicy: Always
schedulerName: default-scheduler
securityContext: {} securityContext: {}
serviceAccount: default serviceAccount: default
serviceAccountName: default serviceAccountName: default
terminationGracePeriodSeconds: 30 terminationGracePeriodSeconds: 30
tolerations:
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes: volumes:
- name: default-token-4bcbi - name: kube-api-access-bgsgp
secret: projected:
secretName: default-token-4bcbi defaultMode: 420
sources:
- serviceAccountToken:
expirationSeconds: 3607
path: token
- configMap:
items:
- key: ca.crt
path: ca.crt
name: kube-root-ca.crt
- downwardAPI:
items:
- fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
path: namespace
status: status:
conditions: conditions:
- lastProbeTime: null - lastProbeTime: null
lastTransitionTime: 2016-03-24T01:39:51Z lastTransitionTime: "2022-02-17T21:51:01Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2022-02-17T21:51:06Z"
status: "True" status: "True"
type: Ready type: Ready
- lastProbeTime: null
lastTransitionTime: "2022-02-17T21:51:06Z"
status: "True"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2022-02-17T21:51:01Z"
status: "True"
type: PodScheduled
containerStatuses: containerStatuses:
- containerID: docker://90315cc9f513c724e9957a4788d3e625a078de84750f244a40f97ae355eb1149 - containerID: containerd://5403af59a2b46ee5a23fb0ae4b1e077f7ca5c5fb7af16e1ab21c00e0e616462a
image: nginx image: docker.io/library/nginx:latest
imageID: docker://6f62f48c4e55d700cf3eb1b5e33fa051802986b77b874cc351cce539e5163707 imageID: docker.io/library/nginx@sha256:2834dc507516af02784808c5f48b7cbe38b8ed5d0f4837f16e78d00deb7e7767
lastState: {} lastState: {}
name: nginx name: nginx
ready: true ready: true
restartCount: 0 restartCount: 0
started: true
state: state:
running: running:
startedAt: 2016-03-24T01:39:51Z startedAt: "2022-02-17T21:51:05Z"
hostIP: 10.240.0.9 hostIP: 192.168.0.113
phase: Running phase: Running
podIP: 10.244.0.6 podIP: 10.88.0.3
startTime: 2016-03-24T01:39:49Z podIPs:
- ip: 10.88.0.3
- ip: 2001:db8::1
qosClass: Guaranteed
startTime: "2022-02-17T21:51:01Z"
``` ```
## Example: debugging a down/unreachable node ## Example: debugging a down/unreachable node
@ -279,116 +336,177 @@ kubectl get nodes
```none ```none
NAME STATUS ROLES AGE VERSION NAME STATUS ROLES AGE VERSION
kubernetes-node-861h NotReady <none> 1h v1.13.0 kube-worker-1 NotReady <none> 1h v1.23.3
kubernetes-node-bols Ready <none> 1h v1.13.0 kubernetes-node-bols Ready <none> 1h v1.23.3
kubernetes-node-st6x Ready <none> 1h v1.13.0 kubernetes-node-st6x Ready <none> 1h v1.23.3
kubernetes-node-unaj Ready <none> 1h v1.13.0 kubernetes-node-unaj Ready <none> 1h v1.23.3
``` ```
```shell ```shell
kubectl describe node kubernetes-node-861h kubectl describe node kube-worker-1
``` ```
```none ```none
Name: kubernetes-node-861h Name: kube-worker-1
Role Roles: <none>
Labels: kubernetes.io/arch=amd64 Labels: beta.kubernetes.io/arch=amd64
kubernetes.io/os=linux beta.kubernetes.io/os=linux
kubernetes.io/hostname=kubernetes-node-861h kubernetes.io/arch=amd64
Annotations: node.alpha.kubernetes.io/ttl=0 kubernetes.io/hostname=kube-worker-1
volumes.kubernetes.io/controller-managed-attach-detach=true kubernetes.io/os=linux
Taints: <none> Annotations: kubeadm.alpha.kubernetes.io/cri-socket: /run/containerd/containerd.sock
CreationTimestamp: Mon, 04 Sep 2017 17:13:23 +0800 node.alpha.kubernetes.io/ttl: 0
Phase: volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Thu, 17 Feb 2022 16:46:30 -0500
Taints: node.kubernetes.io/unreachable:NoExecute
node.kubernetes.io/unreachable:NoSchedule
Unschedulable: false
Lease:
HolderIdentity: kube-worker-1
AcquireTime: <unset>
RenewTime: Thu, 17 Feb 2022 17:13:09 -0500
Conditions: Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ ------- ---- ------ ----------------- ------------------ ------ -------
OutOfDisk Unknown Fri, 08 Sep 2017 16:04:28 +0800 Fri, 08 Sep 2017 16:20:58 +0800 NodeStatusUnknown Kubelet stopped posting node status. NetworkUnavailable False Thu, 17 Feb 2022 17:09:13 -0500 Thu, 17 Feb 2022 17:09:13 -0500 WeaveIsUp Weave pod has set this
MemoryPressure Unknown Fri, 08 Sep 2017 16:04:28 +0800 Fri, 08 Sep 2017 16:20:58 +0800 NodeStatusUnknown Kubelet stopped posting node status. MemoryPressure Unknown Thu, 17 Feb 2022 17:12:40 -0500 Thu, 17 Feb 2022 17:13:52 -0500 NodeStatusUnknown Kubelet stopped posting node status.
DiskPressure Unknown Fri, 08 Sep 2017 16:04:28 +0800 Fri, 08 Sep 2017 16:20:58 +0800 NodeStatusUnknown Kubelet stopped posting node status. DiskPressure Unknown Thu, 17 Feb 2022 17:12:40 -0500 Thu, 17 Feb 2022 17:13:52 -0500 NodeStatusUnknown Kubelet stopped posting node status.
Ready Unknown Fri, 08 Sep 2017 16:04:28 +0800 Fri, 08 Sep 2017 16:20:58 +0800 NodeStatusUnknown Kubelet stopped posting node status. PIDPressure Unknown Thu, 17 Feb 2022 17:12:40 -0500 Thu, 17 Feb 2022 17:13:52 -0500 NodeStatusUnknown Kubelet stopped posting node status.
Addresses: 10.240.115.55,104.197.0.26 Ready Unknown Thu, 17 Feb 2022 17:12:40 -0500 Thu, 17 Feb 2022 17:13:52 -0500 NodeStatusUnknown Kubelet stopped posting node status.
Addresses:
InternalIP: 192.168.0.113
Hostname: kube-worker-1
Capacity: Capacity:
cpu: 2 cpu: 2
hugePages: 0 ephemeral-storage: 15372232Ki
memory: 4046788Ki hugepages-2Mi: 0
pods: 110 memory: 2025188Ki
pods: 110
Allocatable: Allocatable:
cpu: 1500m cpu: 2
hugePages: 0 ephemeral-storage: 14167048988
memory: 1479263Ki hugepages-2Mi: 0
pods: 110 memory: 1922788Ki
pods: 110
System Info: System Info:
Machine ID: 8e025a21a4254e11b028584d9d8b12c4 Machine ID: 9384e2927f544209b5d7b67474bbf92b
System UUID: 349075D1-D169-4F25-9F2A-E886850C47E3 System UUID: aa829ca9-73d7-064d-9019-df07404ad448
Boot ID: 5cd18b37-c5bd-4658-94e0-e436d3f110e0 Boot ID: 5a295a03-aaca-4340-af20-1327fa5dab5c
Kernel Version: 4.4.0-31-generic Kernel Version: 5.13.0-28-generic
OS Image: Debian GNU/Linux 8 (jessie) OS Image: Ubuntu 21.10
Operating System: linux Operating System: linux
Architecture: amd64 Architecture: amd64
Container Runtime Version: docker://1.12.5 Container Runtime Version: containerd://1.5.9
Kubelet Version: v1.6.9+a3d1dfa6f4335 Kubelet Version: v1.23.3
Kube-Proxy Version: v1.6.9+a3d1dfa6f4335 Kube-Proxy Version: v1.23.3
ExternalID: 15233045891481496305 Non-terminated Pods: (4 in total)
Non-terminated Pods: (9 in total) Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits Age
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits --------- ---- ------------ ---------- --------------- ------------- ---
--------- ---- ------------ ---------- --------------- ------------- default nginx-deployment-67d4bdd6f5-cx2nz 500m (25%) 500m (25%) 128Mi (6%) 128Mi (6%) 23m
...... default nginx-deployment-67d4bdd6f5-w6kd7 500m (25%) 500m (25%) 128Mi (6%) 128Mi (6%) 23m
kube-system kube-proxy-dnxbz 0 (0%) 0 (0%) 0 (0%) 0 (0%) 28m
kube-system weave-net-gjxxp 100m (5%) 0 (0%) 200Mi (10%) 0 (0%) 28m
Allocated resources: Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.) (Total limits may be over 100 percent, i.e., overcommitted.)
CPU Requests CPU Limits Memory Requests Memory Limits Resource Requests Limits
------------ ---------- --------------- ------------- -------- -------- ------
900m (60%) 2200m (146%) 1009286400 (66%) 5681286400 (375%) cpu 1100m (55%) 1 (50%)
Events: <none> memory 456Mi (24%) 256Mi (13%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
Events:
...
``` ```
```shell ```shell
kubectl get node kubernetes-node-861h -o yaml kubectl get node kube-worker-1 -o yaml
``` ```
```yaml ```yaml
apiVersion: v1 apiVersion: v1
kind: Node kind: Node
metadata: metadata:
creationTimestamp: 2015-07-10T21:32:29Z annotations:
kubeadm.alpha.kubernetes.io/cri-socket: /run/containerd/containerd.sock
node.alpha.kubernetes.io/ttl: "0"
volumes.kubernetes.io/controller-managed-attach-detach: "true"
creationTimestamp: "2022-02-17T21:46:30Z"
labels: labels:
kubernetes.io/hostname: kubernetes-node-861h beta.kubernetes.io/arch: amd64
name: kubernetes-node-861h beta.kubernetes.io/os: linux
resourceVersion: "757" kubernetes.io/arch: amd64
uid: 2a69374e-274b-11e5-a234-42010af0d969 kubernetes.io/hostname: kube-worker-1
spec: kubernetes.io/os: linux
externalID: "15233045891481496305" name: kube-worker-1
podCIDR: 10.244.0.0/24 resourceVersion: "4026"
providerID: gce://striped-torus-760/us-central1-b/kubernetes-node-861h uid: 98efe7cb-2978-4a0b-842a-1a7bf12c05f8
spec: {}
status: status:
addresses: addresses:
- address: 10.240.115.55 - address: 192.168.0.113
type: InternalIP type: InternalIP
- address: 104.197.0.26 - address: kube-worker-1
type: ExternalIP type: Hostname
allocatable:
cpu: "2"
ephemeral-storage: "14167048988"
hugepages-2Mi: "0"
memory: 1922788Ki
pods: "110"
capacity: capacity:
cpu: "1" cpu: "2"
memory: 3800808Ki ephemeral-storage: 15372232Ki
pods: "100" hugepages-2Mi: "0"
memory: 2025188Ki
pods: "110"
conditions: conditions:
- lastHeartbeatTime: 2015-07-10T21:34:32Z - lastHeartbeatTime: "2022-02-17T22:20:32Z"
lastTransitionTime: 2015-07-10T21:35:15Z lastTransitionTime: "2022-02-17T22:20:32Z"
reason: Kubelet stopped posting node status. message: Weave pod has set this
status: Unknown reason: WeaveIsUp
status: "False"
type: NetworkUnavailable
- lastHeartbeatTime: "2022-02-17T22:20:15Z"
lastTransitionTime: "2022-02-17T22:13:25Z"
message: kubelet has sufficient memory available
reason: KubeletHasSufficientMemory
status: "False"
type: MemoryPressure
- lastHeartbeatTime: "2022-02-17T22:20:15Z"
lastTransitionTime: "2022-02-17T22:13:25Z"
message: kubelet has no disk pressure
reason: KubeletHasNoDiskPressure
status: "False"
type: DiskPressure
- lastHeartbeatTime: "2022-02-17T22:20:15Z"
lastTransitionTime: "2022-02-17T22:13:25Z"
message: kubelet has sufficient PID available
reason: KubeletHasSufficientPID
status: "False"
type: PIDPressure
- lastHeartbeatTime: "2022-02-17T22:20:15Z"
lastTransitionTime: "2022-02-17T22:15:15Z"
message: kubelet is posting ready status. AppArmor enabled
reason: KubeletReady
status: "True"
type: Ready type: Ready
daemonEndpoints:
kubeletEndpoint:
Port: 10250
nodeInfo: nodeInfo:
bootID: 4e316776-b40d-4f78-a4ea-ab0d73390897 architecture: amd64
containerRuntimeVersion: docker://Unknown bootID: 22333234-7a6b-44d4-9ce1-67e31dc7e369
kernelVersion: 3.16.0-0.bpo.4-amd64 containerRuntimeVersion: containerd://1.5.9
kubeProxyVersion: v0.21.1-185-gffc5a86098dc01 kernelVersion: 5.13.0-28-generic
kubeletVersion: v0.21.1-185-gffc5a86098dc01 kubeProxyVersion: v1.23.3
machineID: "" kubeletVersion: v1.23.3
osImage: Debian GNU/Linux 7 (wheezy) machineID: 9384e2927f544209b5d7b67474bbf92b
systemUUID: ABE5F6B4-D44B-108B-C46A-24CCE16C8B6E operatingSystem: linux
osImage: Ubuntu 21.10
systemUUID: aa829ca9-73d7-064d-9019-df07404ad448
``` ```
## {{% heading "whatsnext" %}} ## {{% heading "whatsnext" %}}