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Production-Grade Container Scheduling and Management
c7f970c560
Automatic merge from submit-queue (batch tested with PRs 53567, 53197, 52944, 49593). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Refactor network policy e2e tests, and add additional logging when tests fail **What this PR does / why we need it**: - Restructure tests, clean up duplicate code - Add additional logging, so it's easier to debug when the tests fail - Add retry on the client side pods because sometimes kubelet will start the pod when the network is not ready, resulting in flaky tests - Add readiness probe for the server pods to further reduce the flakiness. Current failure messages when a test fails: ``` checking client-can-connect could communicate with server. Expected error: <*errors.errorString | 0xc420868820>: { s: "pod \"client-can-connect\" failed with status: {Phase:Failed Conditions:[{Type:Initialized Status:True LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:48 -0700 PDT Reason: Message:} {Type:Ready Status:False LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:57 -0700 PDT Reason:ContainersNotReady Message:containers with unready status: [client-can-connect-container]} {Type:PodScheduled Status:True LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:48 -0700 PDT Reason: Message:}] Message: Reason: HostIP:10.138.0.2 PodIP:10.60.1.180 StartTime:2017-07-25 15:54:48 -0700 PDT InitContainerStatuses:[] ContainerStatuses:[{Name:client-can-connect-container State:{Waiting:nil Running:nil Terminated:&ContainerStateTerminated{ExitCode:1,Signal:0,Reason:Error,Message:,StartedAt:2017-07-25 15:54:49 -0700 PDT,FinishedAt:2017-07-25 15:54:57 -0700 PDT,ContainerID:docker://c91c33139672c20a5231bcba9437d74e12d35a6d19275b41bb8e571148b4ab57,}} LastTerminationState:{Waiting:nil Running:nil Terminated:nil} Ready:false RestartCount:0 Image:gcr.io/google_containers/redis:e2e ImageID:docker://sha256:e5e67996c442f903cda78dd983ea6e94bb4e542950fd2eba666b44cbd303df42 ContainerID:docker://c91c33139672c20a5231bcba9437d74e12d35a6d19275b41bb8e571148b4ab57}] QOSClass:BestEffort}", } pod "client-can-connect" failed with status: {Phase:Failed Conditions:[{Type:Initialized Status:True LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:48 -0700 PDT Reason: Message:} {Type:Ready Status:False LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:57 -0700 PDT Reason:ContainersNotReady Message:containers with unready status: [client-can-connect-container]} {Type:PodScheduled Status:True LastProbeTime:0001-01-01 00:00:00 +0000 UTC LastTransitionTime:2017-07-25 15:54:48 -0700 PDT Reason: Message:}] Message: Reason: HostIP:10.138.0.2 PodIP:10.60.1.180 StartTime:2017-07-25 15:54:48 -0700 PDT InitContainerStatuses:[] ContainerStatuses:[{Name:client-can-connect-container State:{Waiting:nil Running:nil Terminated:&ContainerStateTerminated{ExitCode:1,Signal:0,Reason:Error,Message:,StartedAt:2017-07-25 15:54:49 -0700 PDT,FinishedAt:2017-07-25 15:54:57 -0700 PDT,ContainerID:docker://c91c33139672c20a5231bcba9437d74e12d35a6d19275b41bb8e571148b4ab57,}} LastTerminationState:{Waiting:nil Running:nil Terminated:nil} Ready:false RestartCount:0 Image:gcr.io/google_containers/redis:e2e ImageID:docker://sha256:e5e67996c442f903cda78dd983ea6e94bb4e542950fd2eba666b44cbd303df42 ContainerID:docker://c91c33139672c20a5231bcba9437d74e12d35a6d19275b41bb8e571148b4ab57}] QOSClass:BestEffort} not to have occurred ``` Failure message with this PR: ``` should support a 'default-deny' policy [Feature:NetworkPolicy] [It] /Users/gunjan/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/network/network_policy.go:81 Jul 25 14:35:55.978: Pod client-cannot-connect should be able to connect to service svc-server, but was not able to connect. Pod logs: Connecting to svc-server.e2e-tests-network-policy-tbzm8:80 (10.63.254.124:80) wget: download timed out Connecting to svc-server.e2e-tests-network-policy-tbzm8:80 (10.63.254.124:80) wget: download timed out Connecting to svc-server.e2e-tests-network-policy-tbzm8:80 (10.63.254.124:80) wget: download timed out Connecting to svc-server.e2e-tests-network-policy-tbzm8:80 (10.63.254.124:80) wget: download timed out Connecting to svc-server.e2e-tests-network-policy-tbzm8:80 (10.63.254.124:80) wget: download timed out Current NetworkPolicies: [{{ } {deny-all e2e-tests-network-policy-tbzm8 /apis/networking.k8s.io/v1/namespaces/e2e-tests-network-policy-tbzm8/networkpolicies/deny-all 20fa92ab-7181-11e7-855b-42010a8a0003 87694 1 2017-07-25 14:35:07 -0700 PDT <nil> <nil> map[] map[] [] nil [] } {{map[] []} []}}] Pods: [Pod: server, Status: &PodStatus{Phase:Running,Conditions:[{Initialized True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:34:52 -0700 PDT } {Ready True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:35:00 -0700 PDT } {PodScheduled True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:34:52 -0700 PDT }],Message:,Reason:,HostIP:10.138.0.2,PodIP:10.60.1.145,StartTime:2017-07-25 14:34:52 -0700 PDT,ContainerStatuses:[{server-container-80 {nil ContainerStateRunning{StartedAt:2017-07-25 14:34:53 -0700 PDT,} nil} {nil nil nil} true 0 gcr.io/google_containers/porter:4524579c0eb935c056c8e75563b4e1eda31587e0 docker://sha256:711ccbc1c74f3417f2a0f403c194017b3bde09eec3c3b42dc9c838db3894c223 docker://3fa73da57380ef28520f8bbf53b3540f523ab76d45a1b42cc9a1e4573eb45639}],QOSClass:BestEffort,InitContainerStatuses:[],} Pod: server, Status: &PodStatus{Phase:Running,Conditions:[{Initialized True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:34:52 -0700 PDT } {Ready True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:35:00 -0700 PDT } {PodScheduled True 0001-01-01 00:00:00 +0000 UTC 2017-07-25 14:34:52 -0700 PDT }],Message:,Reason:,HostIP:10.138.0.2,PodIP:10.60.1.145,StartTime:2017-07-25 14:34:52 -0700 PDT,ContainerStatuses:[{server-container-80 {nil ContainerStateRunning{StartedAt:2017-07-25 14:34:53 -0700 PDT,} nil} {nil nil nil} true 0 gcr.io/google_containers/porter:4524579c0eb935c056c8e75563b4e1eda31587e0 docker://sha256:711ccbc1c74f3417f2a0f403c194017b3bde09eec3c3b42dc9c838db3894c223 docker://3fa73da57380ef28520f8bbf53b3540f523ab76d45a1b42cc9a1e4573eb45639}],QOSClass:BestEffort,InitContainerStatuses:[],} ] ``` **Release note**: ```release-note NONE ``` |
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Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts, providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
To start using Kubernetes
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To start developing Kubernetes
The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.
If you want to build Kubernetes right away there are two options:
You have a working Go environment.
$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
You have a working Docker environment.
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release
If you are less impatient, head over to the developer's documentation.
Support
If you need support, start with the troubleshooting guide and work your way through the process that we've outlined.
That said, if you have questions, reach out to us one way or another.