Question

我正在使用我的swarm管理容器登录：

time="2016-04-15T02:47:59Z" level=debug msg="Failed to validate pending node: lookup node1 on 10.0.2.3:53: server misbehaving" Addr="node1:2376"

我已经设置了一个github repo来重现我的问题：https://github.com/casertap/playing-with-swarm-tls 我正在运行集群ok 2机器（使用vagrant构建）

$script2 = <<STOP
service docker stop
sed -i 's/DOCKER_OPTS=/DOCKER_OPTS="-H tcp:\\/\\/0.0.0.0:2376 -H unix:\\/\\/\\/var\\/run\\/docker.sock --tlsverify --tlscacert=\\/home\\/vagrant\\/.certs\\/ca.pem --tlscert=\\/home\\/vagrant\\/.certs\\/cert.pem --tlskey=\\/home\\/vagrant\\/.certs\\/key.pem"/' /etc/init/docker.conf
service docker start
STOP

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
    config.vm.box = "ubuntu/trusty64"

    config.vm.define "node1" do |app|
        app.vm.network "private_network", ip: "192.168.33.10"
        app.vm.provision "file", source: "ca.pem", destination: "~/.certs/ca.pem"
        app.vm.provision "file", source: "node1-cert.pem", destination: "~/.certs/cert.pem"
        app.vm.provision "file", source: "node1-priv-key.pem", destination: "~/.certs/key.pem"
        app.vm.provision "file", source: "node1.csr", destination: "~/.certs/node1.csr"
        app.vm.provision "docker"
        app.vm.provision :shell, :inline => $script2
    end
    config.vm.define "swarm" do |app|
        app.vm.network "private_network", ip: "192.168.33.12"
        app.vm.provision "shell", inline: "echo '192.168.33.10 node1' >> /etc/hosts"
        app.vm.provision "shell", inline: "echo '192.168.33.12 swarm' >> /etc/hosts"
        app.vm.provision "docker"
        app.vm.provision "file", source: "ca.pem", destination: "~/.certs/ca.pem"
        app.vm.provision "file", source: "swarm-cert.pem", destination: "~/.certs/cert.pem"
        app.vm.provision "file", source: "swarm-priv-key.pem", destination: "~/.certs/key.pem"
        app.vm.provision "file", source: "swarm.csr", destination: "~/.certs/swarm.csr"
    end
end

正如您所看到的，我的node1 /etc/init/docker.conf有以下选项：

DOCKER_OPTS="-H tcp:\\/\\/0.0.0.0:2376 -H unix:\\/\\/\\/var\\/run\\/docker.sock --tlsverify --tlscacert=\\/home\\/vagrant\\/.certs\\/ca.pem --tlscert=\\/home\\/vagrant\\/.certs\\/cert.pem --tlskey=\\/home\\/vagrant\\/.certs\\/key.pem"

我做

流浪汉

然后我连接到swarm

vagrant ssh swarm
export TOKEN=$(docker run swarm create)
#dd182b8d2bc8c03f417376296558ba29

docker run -d swarm join --advertise node1:2376 token://dd182b8d2bc8c03f417376296558ba29

node1在/ etc / hosts文件中定义，您可以在vagrant配置文件中看到。

启动具有日志调试级别（wihthout -d）

的swarm管理器

docker run -p 3376:3376 -v /home/vagrant/.certs:/certs:ro swarm -l debug manage --tlsverify --tlscacert=/certs/ca.pem --tlscert=/certs/cert.pem --tlskey=/certs/key.pem --host=0.0.0.0:3376 token://dd182b8d2bc8c03f417376296558ba29

日志显示我：

time="2016-04-15T02:47:59Z" level=debug msg="Failed to validate pending node: lookup node1 on 10.0.2.3:53: server misbehaving" Addr="node1:2376"

/ etc / hosts中的node1 ip地址实际上是：

192.168.33.10 node1

似乎docker正在尝试在错误的网桥上查找node1别名？

==========更多信息：

您可以检查此网址以查看发现服务是否找到了您的node1，并确实：

https://discovery.hub.docker.com/v1/clusters/dd182b8d2bc8c03f417376296558ba29

现在，如果您使用-d运行swarm管理器并执行：

vagrant@vagrant-ubuntu-trusty-64:~$ docker --tlsverify --tlscacert=/home/vagrant/.certs/ca.pem --tlscert=/home/vagrant/.certs/cert.pem --tlskey=/home/vagrant/.certs/key.pem -H swarm:3376 info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: swarm/1.2.0
Role: primary
Strategy: spread
Filters: health, port, dependency, affinity, constraint
Nodes: 1
 (unknown): node1:2376
  └ Status: Pending
  └ Containers: 0
  └ Reserved CPUs: 0 / 0
  └ Reserved Memory: 0 B / 0 B
  └ Labels:
  └ Error: (none)
  └ UpdatedAt: 2016-04-15T03:03:28Z
  └ ServerVersion:
Plugins:
 Volume:
 Network:
Kernel Version: 3.13.0-85-generic
Operating System: linux
Architecture: amd64
CPUs: 0
Total Memory: 0 B
Name: ee85273cbb64
Docker Root Dir:
Debug mode (client): false
Debug mode (server): false
WARNING: No kernel memory limit support

您看到该节点正在：待处理

Answer 1

虽然您在计算机的/ etc / hosts中定义了node1，但是swarm管理器运行的容器在其/ etc / hosts文件中没有node1。默认情况下，容器不共享主机的文件系统。见https://docs.docker.com/engine/userguide/containers/dockervolumes/。 Swarm管理器尝试通过DNS解析器查找node1并失败。

有几种方法可以解决这个问题。

使用可解析的FQDN，以便容器中的Swarm管理器可以解析节点
或者在swarm join命令中提供node1的IP
使用-v选项将/ etc / hosts文件从主机传递到Swarm管理器容器。请参阅上面的链接。

Docker swarm TLS无法验证挂起的节点

1 个答案: