Dell NativeEdge：如何解决尝试为 NativeEdge 部署部署 Calico 时的拉取速率限制

Summary: 本文概述了如何使用 Docker Hub 进行身份验证以避免下载速率限制问题。

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Symptoms

对于 NativeEdge Orchestrator 2.1.0.0，建议使用 Calico 作为容器网络接口 （CNI）。
有关安装 Calico 的修改说明，请参阅《NativeEdge Orchestrator 部署指南》。但是，在 Calico 的安装过程中，它会从 Docker Hub 下载。Docker Hub 实施了下载速率限制，在安装 Calico 期间可能会遇到这种情况。（有关费率限制的更多详细信息，请参阅 docker.com。

当用户在安装后列出 Pod 时，用户可以看到 calico Pod 处于 Init：ImagePullBackOff 中，这表明下载容器存在问题。
  
#kubectl get pods -A

NAMESPACE         NAME                                       READY   STATUS                  RESTARTS   AGE
kube-system       local-path-provisioner-957fdf8bc-cl2nl     0/1     Pending                 0          6m50s
kube-system       metrics-server-648b5df564-bncjh            0/1     Pending                 0          6m50s
kube-system       coredns-77ccd57875-cng6c                   0/1     Pending                 0          6m50s
kube-system       calico-kube-controllers-67c64d8b8f-p868c   0/1     Pending                 0          6m39s
kube-system       calico-node-6q82x                          0/1     Init:ImagePullBackOff   0          6m37s

当我们描述印花布节点 pod 时，可以进一步看到这一点 
#kubectl describe pod calico-node-6q82x -n kube-system
Name:                 calico-node-xscmk
Namespace:            kube-system
..
Events:
  Type     Reason     Age                 From               Message
  ----     ------     ----                ----               -------
  Normal   Scheduled  2m4s                default-scheduler  Successfully assigned kube-system/calico-node-xscmk to sre08129
  Warning  Failed     81s (x2 over 2m2s)  kubelet            Failed to pull image "docker.io/calico/cni:v3.28.0": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/calico/cni:v3.28.0": failed to copy: httpReadSeeker: failed open: unexpected status code https://registry-1.docker.io/v2/calico/cni/manifests/sha256:7a3a5cf6c79243ba2de9eef8cb20fac7c46ef75b858956b9884b0ce87b9a354d: 429 Too Many Requests - Server message: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit
  Normal   Pulling    41s (x4 over 2m3s)  kubelet            Pulling image "docker.io/calico/cni:v3.28.0"
  Warning  Failed     40s (x2 over 106s)  kubelet            Failed to pull image "docker.io/calico/cni:v3.28.0": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/calico/cni:v3.28.0": failed to copy: httpReadSeeker: failed open: unexpected status code https://registry-1.docker.io/v2/calico/cni/manifests/sha256:cef0c907b8f4cadc63701d371e6f24d325795bcf0be84d6a517e33000ff35f70: 429 Too Many Requests - Server message: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit
  Warning  Failed     40s (x4 over 2m2s)  kubelet            Error: ErrImagePull
  Normal   BackOff    13s (x6 over 2m1s)  kubelet            Back-off pulling image "docker.io/calico/cni:v3.28.0"
  Warning  Failed     13s (x6 over 2m1s)  kubelet            Error: ImagePullBackOff

从上面可以看出，pod 下载失败，原因是：“
Too Many Requests - Server message： toomanyrequests：您已达到拉动速率限制。您可以通过身份验证和升级来增加限制： https://www.docker.com/increase-rate-limit”

Cause

此问题是由于 dockerhub 设置的拉入速率限制造成的 - 有关详细信息，请参阅 https://www.docker.com/increase-rate-limit 。

Resolution

如果用户使用经过身份验证的 docker hub 帐户，则意味着用户可以具有更高的单个拉入速率限制。
  1. 在 docker.io 上创建帐户 
  2. 在 kube-system 命名空间中创建密钥。此示例使用用于在 docker.io 上注册帐户的凭据创建名为 regcred 的密码 
    kubectl create secret docker-registry regcred --docker-server=https://index.docker.io/v1/ --docker-username=dockeriousername --docker-password=dockeriopassword --docker-email=emailusertoregsisterondockerio --namespace="kube-system"
  3. 用户必须编辑 calico.yaml 才能使用刚刚创建的密钥 （regcred）。
  4. 在 template.spec 中，用户必须包括以下内容： 
    imagePullSecrets: 
        - name: regcred
     
    1. 这里是一个真实的例子，供参考 
      spec:
  selector:
    matchLabels:
      k8s-app: calico-node
    ...
  template:
    metadata:
      labels:
        k8s-app: calico-node
    spec:
      nodeSelector:
       ...
      hostNetwork: true
      tolerations:
      ...
      serviceAccountName: calico-node
      ...
      initContainers:
      ...  
      imagePullSecrets: 
        - name: regcred
    2. 重要提示：只有 calico-node 模板需要添加 imagePullSecrets 功能。
  5. 更改后应用 calico.yaml 
    kubectl apply -f calico.yaml
poddisruptionbudget.policy/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
serviceaccount/calico-node created
serviceaccount/calico-cni-plugin created
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgpfilters.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrole.rbac.authorization.k8s.io/calico-cni-plugin created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-cni-plugin created
daemonset.apps/calico-node created
deployment.apps/calico-kube-controllers created
  1. 用户应看到 kubernetes 群集已成功启动并运行。 
    kubectl get po -A
NAMESPACE     NAME                                       READY   STATUS    RESTARTS   AGE
kube-system   local-path-provisioner-957fdf8bc-x5bn6     1/1     Running   0          22h
kube-system   coredns-77ccd57875-hf82q                   1/1     Running   0          22h
kube-system   calico-kube-controllers-8498bff86b-tprzt   1/1     Running   0          9m18s
kube-system   calico-node-pxwqm                          1/1     Running   0          9m18s
kube-system   metrics-server-648b5df564-xdh4h            1/1     Running   0          22h

     

Affected Products

NativeEdge Solutions, NativeEdge
Article Properties
Article Number: 000225940
Article Type: Solution
Last Modified: 01 Oct 2024
Version:  4
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