我使用以下命令创建了一个 GKE 集群:
gcloud container clusters create experiment --num-nodes=1 --network default --subnetwork default --enable-private-nodes --enable-private-endpoint --enable-ip-alias --master-ipv4-cidr 172.16.0.16/28 --no-enable-basic-auth --no-issue-client-certificate
我的 VPC 防火墙中没有出口规则 我在 VPC 路由下有一个自动创建的默认路由,适用于 GKE 节点并允许访问 Internet。
在 GKE 节点上,我可以:
$ docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
bb79b6b2107f: Pull complete
111447d5894d: Pull complete
a95689b8e6cb: Pull complete
1a0022e444c2: Pull complete
32b7488a3833: Pull complete
Digest: sha256:ed7f815851b5299f616220a63edac69a4cc200e7f536a56e421988da82e44ed8
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
docker pull ubuntu
Using default tag: latest
latest: Pulling from library/ubuntu
6a5697faee43: Pull complete
ba13d3bc422b: Pull complete
a254829d9e55: Pull complete
Digest: sha256:fff16eea1a8ae92867721d90c59a75652ea66d29c05294e6e2f898704bdb8cf1
Status: Downloaded newer image for ubuntu:latest
docker.io/library/ubuntu:latest
但我不能:
$ wget https://www.amazon.com
--2020-10-31 19:22:44-- https://www.amazon.com/
Resolving www.amazon.com... 13.226.21.44
Connecting to www.amazon.com|13.226.21.44|:443...
但是我可以:
$ wget https://www.google.com
--2020-10-31 19:23:15-- https://www.google.com/
Resolving www.google.com... 172.217.212.147, 172.217.212.99, 172.217.212.106, ...
Connecting to www.google.com|172.217.212.147|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: 'index.html.1'
index.html.1 [ <=> ] 12.48K --.-KB/s in 0s
2020-10-31 19:23:15 (72.1 MB/s) - 'index.html.1' saved [12782]
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.128.0.1 0.0.0.0 UG 1024 0 0 eth0
10.108.2.0 0.0.0.0 255.255.255.0 U 0 0 0 cbr0
10.128.0.1 0.0.0.0 255.255.255.255 UH 1024 0 0 eth0
169.254.123.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
GKE 节点上的互联网连接发生了什么。我可以访问 docker hub 但不能访问www.amazon.com?这里有点困惑。