https://github.com/rkt/rkt/issues/3647で説明した Kubelet の問題について、Kubernetes コミュニティにアドバイスを求めたいと思います。ここにコピーされた問題の簡単な要約と、上記の Github リンクで詳細を確認してください。
概要
Fedora vm で開発クラスターを設定する際に問題があります...すべてが適切に構成されていると思いますが、何が問題なのかについての良いヒントが見つかりません。
私の計画は、Fedora 25 Workstation で Rocket 1.25 を使用して Kubernetes 1.6 を試すことです。すべてが開始されたように見えますが、(おそらく) Kubelet が RKT API と通信できません。手動のインストール手順 (URL は削除され、git を参照) とKubernetes git リポジトリー
のサンプル サービスのいくつかを使用しようとしました。systemddocker から git への変更については、次のヒントに従ってみました (URL は git を参照してください)。
関連するコンポーネント、相違点、およびロケットに切り替えて 1.6 を使用するための労力をよりよく理解するために、セットアップ全体をゼロから行うことを好みます (Fedora リポジトリには 1.5 rpm しかありません)。
問題は次のとおりだと思います。
「rkt grpc: Server.Serve は ServerTransport の作成に失敗しました: 接続エラー: desc = "トランスポート: 書き込み tcp [::1]:15441->[::1]:46834: 書き込み: 壊れたパイプ"
以下のメッセージですが、私の仮定が正しいかどうか、およびそれを修正する方法がわかりません。
これがソフトウェアの欠陥か設定ミスかを調べるのを手伝ってくれませんか?
エラー
[root@pp-fed-vm ppavlov]# systemctl restart kubelet; sleep 5; systemctl status kubelet
-> /usr/bin/kubelet --logtostderr=true --v=0 --api-servers=http://127.0.0.1:8080 --address=127.0.0.1 --hostname-override=pp-fed-vm --allow-privileged=false --container-runtime=rkt --rkt-api-endpoint=127.0.0.1:15441 --cgroup-driver=systemd
kubelet[23222]: I0416 20:54:54.996239 23222 server.go:294] Adding debug handlers to kubelet server.
kubelet[23222]: I0416 20:54:55.081344 23222 kubelet_node_status.go:230] Setting node annotation to enable volume controller attach/detach
kubelet[23222]: E0416 20:54:55.092550 23222 kubelet.go:1661] Failed to check if disk space is available for the runtime: failed to get fs info for "runtime": unable to find data for container /
kubelet[23222]: E0416 20:54:55.092649 23222 kubelet.go:1669] Failed to check if disk space is available on the root partition: failed to get fs info for "root": unable to find data for container /
kubelet[23222]: I0416 20:54:55.092759 23222 kubelet_node_status.go:77] Attempting to register node pp-fed-vm
kubelet[23222]: I0416 20:54:55.096327 23222 kubelet_node_status.go:128] Node pp-fed-vm was previously registered
kubelet[23222]: I0416 20:54:55.096374 23222 kubelet_node_status.go:80] Successfully registered node pp-fed-vm
kubelet[23222]: E0416 20:54:55.109909 23222 kubelet.go:1661] Failed to check if disk space is available for the runtime: failed to get fs info for "runtime": unable to find data for container /
kubelet[23222]: E0416 20:54:55.109939 23222 kubelet.go:1669] Failed to check if disk space is available on the root partition: failed to get fs info for "root": unable to find data for container /
kubelet[23222]: I0416 20:54:55.109970 23222 kubelet_node_status.go:682] Node became not ready: {Type:Ready Status:False LastHeartbeatTime:2017-04-16 20:54:55.10995563 +020
[root@pp-fed-vm k8s]# journalctl -xe
kubelet[23362]: I0416 20:57:11.736831 23362 feature_gate.go:144] feature gates: map[]
kubelet[23362]: W0416 20:57:11.736896 23362 server.go:715] Could not load kubeconfig file /var/lib/kubelet/kubeconfig: stat /var/lib/kubelet/kubeconfig:no such file or directory. Using default client config instead.
kubelet[23362]: W0416 20:57:11.737389 23362 cni.go:157] Unable to update cni config: No networks found in /etc/cni/net.d
kubelet[23362]: I0416 20:57:11.743870 23362 manager.go:143] cAdvisor running in container: "/system.slice"
rkt[23022] : 2017/04/16 20:57:11 grpc: Server.Serve failed to create ServerTransport: connection error: desc = "transport: write tcp [::1]:15441->[::1]:35570: write: broken pipe"
kubelet[23362]: I0416 20:57:11.784074 23362 fs.go:117] Filesystem partitions: map[/dev/mapper/fedora_pp--fed--vm-root:{mountpoint:/ major:253 minor:0 fsType:ext4 blockSize:0} /dev/sda1:{mountpoint:/boot major:8 minor:1 fsType:ext4 blockSize:0}
kubelet[23362]: I0416 20:57:11.785244 23362 manager.go:198] Machine: {NumCores:4 CpuFrequency:2893314 MemoryCapacity:8370282496 MachineID:faacc8d3edd840e6b32933eb5ca9217f SystemUUID:2E6067FA-A4D6-42F3-8FA7-86BD63DEEF74 BootID:643ca77e-bf97-4794-b9a6-f4bab0efaeab
kubelet[23362]: tanceID:None}
kubelet[23362]: I0416 20:57:11.793513 23362 manager.go:204] Version: {KernelVersion:4.10.9-200.fc25.x86_64 ContainerOsVersion:Fedora 25 (Workstation Edition) DockerVersion:1.12.6 CadvisorVersion: CadvisorRevision:}
kubelet[23362]: I0416 20:57:11.796793 23362 server.go:509] --cgroups-per-qos enabled, but --cgroup-root was not specified. defaulting to /
kubelet[23362]: W0416 20:57:11.798146 23362 container_manager_linux.go:218] Running with swap on is not supported, please disable swap! This will be a fatal error by defaut starting in K8s v1.6!
kubelet[23362]: I0416 20:57:11.798224 23362 container_manager_linux.go:245] container manager verified user specified cgroup-root exists: /
kubelet[23362]: I0416 20:57:11.798233 23362 container_manager_linux.go:250] Creating Container Manager object based on Node Config: {RuntimeCgroupsName: SystemCgroupsName: KubeletCgroupsName: ContainerRuntime:rkt CgroupsPerQOS:true CgroupRoot:/ CgroupDriver:systemd
kubelet[23362]: I0416 20:57:11.798384 23362 kubelet.go:265] Watching apiserver
kubelet[23362]: W0416 20:57:11.800709 23362 kubelet_network.go:63] Hairpin mode set to "promiscuous-bridge" but container runtime is "rkt", ignoring
kubelet[23362]: I0416 20:57:11.800945 23362 kubelet.go:494] Hairpin mode set to "none"
kubelet[23362]: I0416 20:57:11.807565 23362 server.go:869] Started kubelet v1.6.1
kubelet[23362]: E0416 20:57:11.808028 23362 kubelet.go:1165] Image garbage collection failed: unable to find data for container /
kubelet[23362]: I0416 20:57:11.808693 23362 fs_resource_analyzer.go:66] Starting FS ResourceAnalyzer
kubelet[23362]: I0416 20:57:11.808719 23362 status_manager.go:140] Starting to sync pod status with apiserver
kubelet[23362]: I0416 20:57:11.808725 23362 kubelet.go:1741] Starting kubelet main sync loop.
kubelet[23362]: I0416 20:57:11.808849 23362 kubelet.go:1752] skipping pod synchronization - [container runtime is down PLEG is not healthy: pleg was last seen active 25620
kubelet[23362]: I0416 20:57:11.809008 23362 server.go:127] Starting to listen on 127.0.0.1:10250
kubelet[23362]: I0416 20:57:11.809547 23362 server.go:294] Adding debug handlers to kubelet server.
kubelet[23362]: W0416 20:57:11.811322 23362 container_manager_linux.go:741] CPUAccounting not enabled for pid: 23362
kubelet[23362]: W0416 20:57:11.811333 23362 container_manager_linux.go:744] MemoryAccounting not enabled for pid: 23362
kubelet[23362]: I0416 20:57:11.811389 23362 volume_manager.go:248] Starting Kubelet Volume Manager
kubelet[23362]: E0416 20:57:11.814453 23362 kubelet.go:2058] Container runtime status is nil
audit: NETFILTER_CFG table=nat family=2 entries=37
audit: NETFILTER_CFG table=nat family=2 entries=37
audit: NETFILTER_CFG table=nat family=2 entries=37
kubelet[23362]: I0416 20:57:11.911763 23362 kubelet_node_status.go:230] Setting node annotation to enable volume controller attach/detach
kubelet[23362]: E0416 20:57:11.991246 23362 kubelet.go:1661] Failed to check if disk space is available for the runtime: failed to get fs info for "runtime": unable to find data for container /
kubelet[23362]: E0416 20:57:11.991281 23362 kubelet.go:1669] Failed to check if disk space is available on the root partition: failed to get fs info for "root": unable to find data for container /
kubelet[23362]: I0416 20:57:11.991382 23362 kubelet_node_status.go:77] Attempting to register node pp-fed-vm
kubelet[23362]: I0416 20:57:11.998021 23362 kubelet_node_status.go:128] Node pp-fed-vm was previously registered
kubelet[23362]: I0416 20:57:11.998040 23362 kubelet_node_status.go:80] Successfully registered node pp-fed-vm
kubelet[23362]: E0416 20:57:12.021057 23362 kubelet.go:1661] Failed to check if disk space is available for the runtime: failed to get fs info for "runtime": unable to find data for container /
kubelet[23362]: E0416 20:57:12.021083 23362 kubelet.go:1669] Failed to check if disk space is available on the root partition: failed to get fs info for "root": unable to find data for container /
kubelet[23362]: I0416 20:57:16.810561 23362 kubelet.go:1752] skipping pod synchronization - [container runtime is down]
kubelet[23362]: E0416 20:57:16.816235 23362 kubelet.go:2058] Container runtime status is n