单独部署kube-master时提示cni plugins相关插件安装失败

[zhoufwind]

现象

单独部署kube-master时提示cni plugins相关插件安装失败。

# ansible-playbook 04.kube-master.yml 
...
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: AnsibleFileNotFound: Could not find or access '/etc/ansible/bin/bridge'
failed: [192.168.x.x] (item=bridge) => {"changed": false, "item": "bridge", "msg": "Could not find or access '/etc/ansible/bin/bridge'"}
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: AnsibleFileNotFound: Could not find or access '/etc/ansible/bin/host-local'
failed: [192.168.x.x] (item=host-local) => {"changed": false, "item": "host-local", "msg": "Could not find or access '/etc/ansible/bin/host-local'"}
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: AnsibleFileNotFound: Could not find or access '/etc/ansible/bin/loopback'
failed: [192.168.x.x] (item=loopback) => {"changed": false, "item": "loopback", "msg": "Could not find or access '/etc/ansible/bin/loopback'"}

PLAY RECAP *************************************************************************************************************************************************************************************************
192.168.x.x             : ok=15   changed=14   unreachable=0    failed=1   

原因

down/download.sh脚本负责下载各二进制文件，其中cni plugins解压失败，导致kube-master部署时抛异常。

根据CNI plugins github链接所示，其二进制文件名格式为：cni-plugins-amd64-${CNI_VER}.tgz，而非：cni-${CNI_VER}.tgz，需对其进行更正。

[gjmzj]

感谢PR