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ssl - 无法针对 tls 安全 etcd 设置 kubernetes

转载 作者:太空宇宙 更新时间:2023-11-03 12:53:18 25 4
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我正在尝试使用 etcd 配置启动 kubernetes api 服务器(kubernetes 使用 go-etcd,它有一种方法可以从配置文件中读取所有参数):

{ 
"cluster": {
"machines": [ "https://my-public-hostname:2379" ]
},
"config": {
"certFile": "/etc/ssl/etcd/client.pem",
"keyFile": "/etc/ssl/etcd/client.key.pem",
"caCertFiles": [
"/etc/ssl/etcd/ca.pem"
],
"timeout": 5,
"consistency": "WEAK"
}
}

但在 kube-apiserver 中失败,因为它无法成功到达 etcd。我认为这是因为它试图同步集群...但我不知道。

我已经使用内部 ips 创建了一个 (etcd) 集群,用于广告和客户端地址,但 listen-client-urls 设置为 0.0.0.0/0。此外,整个集群都位于负载均衡器之后,可通过 my-public-hostname 访问。 .

在容器内(因为我使用的是 hyperkube ),etcdctl除非我设置“--no-sync”参数,否则不会工作。如果我在没有该参数的情况下使用 etcdctl,它就会像 kube-apiserver 那样可疑地失败。但是我无法检查 kubernetes 中执行集群同步的代码片段......

有什么想法吗?

提前致谢。

编辑:

这似乎是与 kubernetes ( https://github.com/coreos/go-etcd ) 中当前的 etcd 客户端相关的错误,这不是最新的 ( https://github.com/coreos/etcd/client )。我根据经验对此进行了测试,“etcd/client”有效,但“go-etcd”无效,您可以在此处查看此测试: https://github.com/glerchundi/etcd-go-clients-test

值得注意的是,正在进行将 go-etcd 迁移到 kubernetes 中的 etcd/client 的工作: https://github.com/kubernetes/kubernetes/issues/11962 .

Kubernetes 团队的任何人都可以证实这一点吗?

附录 1

我正在尝试在 CoreOS 中运行 kubernetes 并且: flannel作品, locksmithd作品, fleet有效(他们使用完全相同的 etcd 客户端凭据访问 etcd)所以这可能与 kubernetes 如何访问 etcd 端点有关。

附录 2(这些命令在 hyperkube 容器内执行,具体为: gcr.io/google_containers/hyperkube:v1.0.6)

不带 --no-sync 的 etcdctl 无法输出:

root@98b2524464f1:/# etcdctl --cert-file="/etc/ssl/etcd/client.pem" --key-file="/etc/ssl/etcd/client.key.pem" --ca-file="/etc/ssl/etcd/ca.pem" --peers="http//my-public-hostname:2379" ls / 
Error: 501: All the given peers are not reachable (failed to propose on members [https://10.1.0.1:2379 https://10.1.0.0:2379 https://10.1.0.2:2379] twice [last error: Get https://10.1.0.0:2379/v2/keys/?quorum=false&recursive=false&sorted=false: dial tcp 10.1.0.0:2379: i/o timeout]) [0]

还有 kube-apiserver:

root@98b2524464f1:/# /hyperkube \ 
apiserver \
--bind-address=0.0.0.0 \
--etcd_config=/etc/kubernetes/ssl/etcd.json \
--allow-privileged=true \
--service-cluster-ip-range=10.3.0.0/24 \
--secure_port=443 \
--advertise-address=10.0.0.2 \
--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota \
--tls-cert-file=/etc/kubernetes/ssl/apiserver.pem \
--tls-private-key-file=/etc/kubernetes/ssl/apiserver.key.pem \
--client-ca-file=/etc/kubernetes/ssl/ca.pem \
--service-account-key-file=/etc/kubernetes/ssl/apiserver.key.pem

F1002 09:47:29.348527 384 controller.go:80] Unable to perform initial IP allocation check: unable to refresh the service IP block: 501: All the given peers are not reachable (failed to propose on members [https://my-public-hostname:2379] twice [last error: Get https://my-public-hostname:2379/v2/keys/registry/ranges/serviceips?quorum=false&recursive=false&sorted=false: dial tcp: i/o timeout]) [0]

附录 3

etcd #0:
etcd2:
name: etcd0
initial-cluster-state: new
initial-cluster: etcd0=http://10.1.0.0:2380,etcd1=http://10.1.0.1:2380,etcd2=http://10.1.0.2:2380
data-dir: /var/lib/etcd2
advertise-client-urls: https://10.1.0.0:2379
initial-advertise-peer-urls: http://10.1.0.0:2380
listen-client-urls: https://0.0.0.0:2379
listen-peer-urls: http://10.1.0.0:2380
client-cert-auth: true
trusted-ca-file: /etc/ssl/etcd/certs/ca-chain.cert.pem
cert-file: /etc/ssl/etcd/certs/etcd-server.cert.pem
key-file: /etc/ssl/etcd/private/etcd-server.key.pem

etcd #1:
etcd2:
name: etcd1
initial-cluster-state: new
initial-cluster: etcd0=http://10.1.0.0:2380,etcd1=http://10.1.0.1:2380,etcd2=http://10.1.0.2:2380
data-dir: /var/lib/etcd2
advertise-client-urls: https://10.1.0.1:2379
initial-advertise-peer-urls: http://10.1.0.1:2380
listen-client-urls: https://0.0.0.0:2379
listen-peer-urls: http://10.1.0.1:2380
client-cert-auth: true
trusted-ca-file: /etc/ssl/etcd/certs/ca-chain.cert.pem
cert-file: /etc/ssl/etcd/certs/etcd-server.cert.pem
key-file: /etc/ssl/etcd/private/etcd-server.key.pem

etcd #2:
etcd2:
name: etcd2
initial-cluster-state: new
initial-cluster: etcd0=http://10.1.0.0:2380,etcd1=http://10.1.0.1:2380,etcd2=http://10.1.0.2:2380
data-dir: /var/lib/etcd2
advertise-client-urls: https://10.1.0.2:2379
initial-advertise-peer-urls: http://10.1.0.2:2380
listen-client-urls: https://0.0.0.0:2379
listen-peer-urls: http://10.1.0.2:2380
client-cert-auth: true
trusted-ca-file: /etc/ssl/etcd/certs/ca-chain.cert.pem
cert-file: /etc/ssl/etcd/certs/etcd-server.cert.pem
key-file: /etc/ssl/etcd/private/etcd-server.key.pem

最佳答案

最后我找出了导致这个问题的原因。超时未正确定义,因为 go-etcd 将 json 超时值解码为 time.Duration,它使用纳秒作为基本单位。因此,对于 1s 的值,应该写入 1000000000。

按照上面的例子:

{ 
"cluster": {
"machines": [ "https://my-public-hostname:2379" ]
},
"config": {
"certFile": "/etc/ssl/etcd/client.pem",
"keyFile": "/etc/ssl/etcd/client.key.pem",
"caCertFiles": [
"/etc/ssl/etcd/ca.pem"
],
"timeout": 5000000000,
"consistency": "WEAK"
}
}

关于ssl - 无法针对 tls 安全 etcd 设置 kubernetes,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32912699/

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