安裝flanal報錯解決

1、：Error registering network: failed to acquire lease: node "test4" pod cidr not assigned

執行kubectl create kube-flannel.yml 創建后，發現flannel剛開始running了幾秒，然后就處於Error狀態

先查看pod

[root@test4 profile]# kubectl get pods -n kube-system
NAME                    READY   STATUS   RESTARTS   AGE
kube-flannel-ds-gzvrh   0/1     Error    0          <invalid>


再通過docker查看flannel日志


[root@test4 profile]# docker ps -l
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
f7be3ebe77fd        b949a39093d6        "/opt/bin/flanneld -…"   1 second ago        Created                                 k8s_kube-flannel_kube-flannel-ds-7cqww_kube-system_26fab004-2b88-11e9-9085-000c2935f634_0

[root@test4 profile]# docker logs f7be3ebe77fd 
I0208 09:58:34.068723       1 main.go:488] Using interface with name ens33 and address 192.168.0.94
I0208 09:58:34.069094       1 main.go:505] Defaulting external address to interface address (192.168.0.94)
I0208 09:58:34.376952       1 kube.go:131] Waiting 10m0s for node controller to sync
I0208 09:58:34.466001       1 kube.go:294] Starting kube subnet manager
I0208 09:58:35.481478       1 kube.go:138] Node controller sync successful
I0208 09:58:35.481666       1 main.go:235] Created subnet manager: Kubernetes Subnet Manager - test4
I0208 09:58:35.481694       1 main.go:238] Installing signal handlers
I0208 09:58:35.482001       1 main.go:353] Found network config - Backend type: vxlan
I0208 09:58:35.482255       1 vxlan.go:120] VXLAN config: VNI=1 Port=0 GBP=false DirectRouting=false
E0208 09:58:35.483159       1 main.go:280] Error registering network: failed to acquire lease: node "test4" pod cidr not assigned
I0208 09:58:35.483433       1 main.go:333] Stopping shutdownHandler...


看到：Error registering network: failed to acquire lease: node "test4" pod cidr not assigned

原因：是因為按照二進制高可用文檔安裝配置kube-controller-manager啟動文件的時候，有坑，當時沒有發現，

解決：

啟動文件加上下面兩句話，那篇文檔沒有加，所以報錯；下面這個cluster-cidr要和kube-flannel.yml里面的地址一致，要和kube-proxy.config.yaml里面的clusterCIDR一致

  --allocate-node-cidrs=true \
  --cluster-cidr=172.30.0.0/16 \




2、報錯2 ： 創建flnal 后 一會runing  一會掛掉

解決:

安裝kube-kube-proxy ，不要選擇ipvs模式，centos7環境，ipvs模式在1.11.0不行， 在1.11.1之后就ok了
 
參照文檔：

https://www.cnblogs.com/iiiiher/p/8159693.html