有没有一种方法可以定义Flannel应该在哪个接口(interface)中监听？根据his documentation的说法，在/etc/sysconfig/flanneld中添加FLANNEL_OPTIONS =“-iface = enp0s8”应该可以，但不能。
我的主节点配置在xenial(ubuntu 16.04)流浪汉中运行:
$ sudo kubeadm init --pod-network-cidr 10.244.0.0/16 --apiserver-advertise-address 10.0.0.10
$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
clusterrole "flannel" created
clusterrolebinding "flannel" created
serviceaccount "flannel" created
configmap "kube-flannel-cfg" created
daemonset "kube-flannel-ds" created
ubuntu@master:~$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/k8s-manifests/kube-flannel-rbac.yml
clusterrole "flannel" configured
clusterrolebinding "flannel" configured
主机IP地址:
$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 02:63:8e:2c:ef:cd brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global enp0s3
valid_lft forever preferred_lft forever
inet6 fe80::63:8eff:fe2c:efcd/64 scope link
valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:fb:ad:bb brd ff:ff:ff:ff:ff:ff
inet 10.0.0.10/24 brd 10.0.0.255 scope global enp0s8
valid_lft forever preferred_lft forever
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:da:aa:6e:13 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
5: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default
link/ether 5e:07:a1:7f:97:53 brd ff:ff:ff:ff:ff:ff
inet 10.244.0.0/32 scope global flannel.1
valid_lft forever preferred_lft forever
inet6 fe80::5c07:a1ff:fe7f:9753/64 scope link
valid_lft forever preferred_lft forever
6: cni0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 0a:58:0a:f4:00:01 brd ff:ff:ff:ff:ff:ff
inet 10.244.0.1/24 scope global cni0
valid_lft forever preferred_lft forever
inet6 fe80::7037:fcff:fe41:b1fb/64 scope link
valid_lft forever preferred_lft forever
pods 名称:
$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system etcd-master 1/1 Running 0 2m
kube-system kube-apiserver-master 1/1 Running 0 2m
kube-system kube-controller-manager-master 1/1 Running 0 2m
kube-system kube-dns-545bc4bfd4-gjjth 0/3 ContainerCreating 0 3m
kube-system kube-flannel-ds-gdz8f 1/1 Running 0 1m
kube-system kube-flannel-ds-h4fd2 1/1 Running 0 33s
kube-system kube-flannel-ds-rnlsz 1/1 Running 1 33s
kube-system kube-proxy-d4wv9 1/1 Running 0 33s
kube-system kube-proxy-fdkqn 1/1 Running 0 3m
kube-system kube-proxy-kj7tn 1/1 Running 0 33s
kube-system kube-scheduler-master 1/1 Running 0 2m
法兰绒日志:
$ kubectl logs -n kube-system kube-flannel-ds-gdz8f -c kube-flannel
I1216 12:00:35.817207 1 main.go:474] Determining IP address of default interface
I1216 12:00:35.822082 1 main.go:487] Using interface with name enp0s3 and address 10.0.2.15
I1216 12:00:35.822335 1 main.go:504] Defaulting external address to interface address (10.0.2.15)
I1216 12:00:35.909906 1 kube.go:130] Waiting 10m0s for node controller to sync
I1216 12:00:35.909950 1 kube.go:283] Starting kube subnet manager
I1216 12:00:36.987719 1 kube.go:137] Node controller sync successful
I1216 12:00:37.087300 1 main.go:234] Created subnet manager: Kubernetes Subnet Manager - master
I1216 12:00:37.087433 1 main.go:237] Installing signal handlers
I1216 12:00:37.088836 1 main.go:352] Found network config - Backend type: vxlan
I1216 12:00:37.089018 1 vxlan.go:119] VXLAN config: VNI=1 Port=0 GBP=false DirectRouting=false
I1216 12:00:37.295988 1 main.go:299] Wrote subnet file to /run/flannel/subnet.env
I1216 12:00:37.296025 1 main.go:303] Running backend.
I1216 12:00:37.296048 1 main.go:321] Waiting for all goroutines to exit
I1216 12:00:37.296084 1 vxlan_network.go:56] watching for new subnet leases
如何在kubernetes 中配置法兰绒以监听enp0s8而不是enp0s3 ？
最佳答案
我也有同样的问题，尝试使用k8s和Vagrant。
我在documentation of flannel中找到了这个注释:
因此，我在法兰绒的pod配置中寻找它。
如果下载kube-flannel.yml文件，则应查看DaemonSet规范，尤其是“kube-flannel”容器。在那里，您应该添加必需的“--iface = enp0s8”参数(不要忘记使用“=”)。我使用过的部分代码。
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.10.0-amd64
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
- --iface=enp0s8
然后运行
kubectl apply -f kube-flannel.yml希望会有所帮助。
关于ubuntu - 配置法兰绒以在kubernetes中使用非默认接口(interface)，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/47845739/