在节点 root下运行 sudo bash -c "$(curl -sS http://dl.appnode.com/install-agent.sh)"
报安装错误信息：

• AppNode Agent Installer Version:

• Synchronizing server time...ok
  
  >> Updating software repository
  
  

• Installing repository appnode-agent...
  Setting up Install Process
  Examining /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm: appnode-agent-release-1.2-1.el6.x86_64
  Marking /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm to be installed
  http://192.168.11.10/cobbler/ks_mirror/CentOS-6.9-x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://192.168.11.10/cobbler/ks_mirror/CentOS-6.9-x86_64/repodata/repomd.xml: (28, 'connect() timed out!')
  Trying other mirror.
  Error: Cannot retrieve repository metadata (repomd.xml) for repository: core-0. Please verify its path and try again
  05-13 11:40:16.110 repo » ERRO 001 Setting up Install Process
  Examining /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm: appnode-agent-release-1.2-1.el6.x86_64
  Marking /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm to be installed
  05-13 11:40:16.110 repo » ERRO 001 [repo_yum.go:242 YumInstallRepoPkg] Setting up Install Process
  Examining /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm: appnode-agent-release-1.2-1.el6.x86_64
  Marking /var/tmp/yum-root-pSN1FG/appnode-agent-release-1.2-1.el6.x86_64.rpm to be installed
  05-13 11:40:16.110 repo » ERRO 002 http://192.168.11.10/cobbler/ks_mirror/CentOS-6.9-x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://192.168.11.10/cobbler/ks_mirror/CentOS-6.9-x86_64/repodata/repomd.xml: (28, 'connect() timed out!')
  Trying other mirror.
  Error: Cannot retrieve repository metadata (repomd.xml) for repository: core-0. Please verify its path and try again
  05-13 11:40:16.110 repo » ERRO 002 [repo_yum.go:243 YumInstallRepoPkg] http://192.168.11.10/cobbler/ks_mirror/CentOS-6.9-x86_64/repodata/repomd.xml: [Errno 12] Timeout on