0f082c6663
Automatic merge from submit-queue Better messaging for missing volume binaries on host **What this PR does / why we need it**: When mount binaries are not present on a host, the error returned is a generic one. This change is to check the mount binaries before the mount and return a user-friendly error message. This change is specific to GCI and the flag is experimental now. https://github.com/kubernetes/kubernetes/issues/36098 **Release note**: Introduces a flag `check-node-capabilities-before-mount` which if set, enables a check (`CanMount()`) prior to mount operations to verify that the required components (binaries, etc.) to mount the volume are available on the underlying node. If the check is enabled and `CanMount()` returns an error, the mount operation fails. Implements the `CanMount()` check for NFS. Sample output post change : rkouj@rkouj0:~/go/src/k8s.io/kubernetes$ kubectl describe pods Name: sleepyrc-fzhyl Namespace: default Node: e2e-test-rkouj-minion-group-oxxa/10.240.0.3 Start Time: Mon, 07 Nov 2016 21:28:36 -0800 Labels: name=sleepy Status: Pending IP: Controllers: ReplicationController/sleepyrc Containers: sleepycontainer1: Container ID: Image: gcr.io/google_containers/busybox Image ID: Port: Command: sleep 6000 QoS Tier: cpu: Burstable memory: BestEffort Requests: cpu: 100m State: Waiting Reason: ContainerCreating Ready: False Restart Count: 0 Environment Variables: Conditions: Type Status Initialized True Ready False PodScheduled True Volumes: data: Type: NFS (an NFS mount that lasts the lifetime of a pod) Server: 127.0.0.1 Path: /export ReadOnly: false default-token-d13tj: Type: Secret (a volume populated by a Secret) SecretName: default-token-d13tj Events: FirstSeen LastSeen Count From SubobjectPath Type Reason Message --------- -------- ----- ---- ------------- -------- ------ ------- 7s 7s 1 {default-scheduler } Normal Scheduled Successfully assigned sleepyrc-fzhyl to e2e-test-rkouj-minion-group-oxxa 6s 3s 4 {kubelet e2e-test-rkouj-minion-group-oxxa} Warning FailedMount Unable to mount volume kubernetes.io/nfs/32c7ef16-a574-11e6-813d-42010af00002-data (spec.Name: data) on pod sleepyrc-fzhyl (UID: 32c7ef16-a574-11e6-813d-42010af00002). Verify that your node machine has the required components before attempting to mount this volume type. Required binary /sbin/mount.nfs is missing
Cluster Configuration
Deprecation Notice: This directory has entered maintenance mode and will not be accepting new providers. Please submit new automation deployments to kube-deploy. Deployments in this directory will continue to be maintained and supported at their current level of support.
The scripts and data in this directory automate creation and configuration of a Kubernetes cluster, including networking, DNS, nodes, and master components.
See the getting-started guides for examples of how to use the scripts.
cloudprovider/config-default.sh contains a set of tweakable definitions/parameters for the cluster.
The heavy lifting of configuring the VMs is done by SaltStack.