Network failure. Check the network settings and try again. when trying to update vCenter from VAMI

Products

• VMware vCenter Server

Issue/Introduction

• vCenter Server patching via VAMI fails to download the updates from Broadcom public repositories.

Environment

VMware vCenter Server 8.x

Cause

If a proxy is enabled vCenter must be added to the no proxy list

Resolution

If the proxy is configured to use the same TCP port for both HTTP and HTTPS traffic, 

• open an SSH connection to the vCenter Server Appliance
• create a backup of the proxy configuration:

  # cp /etc/sysconfig/proxy /storage/core/proxy.bak

• edit the file:

  # vi /etc/sysconfig/proxy

• find the line starting with HTTPS_PROXY="https://..." and change this to HTTPS_PROXY="http://..."
• find the line starting with NO_PROXY
• edit this line and add both the fully-qualified domain name and the IP address of the vCenter Server to this line

NOTE: Please be aware that the entries in NO_PROXY need to be separated by a comma followed by a single space. Only using a comma as separator is not enough. Also, should when considering to exclude a whole domain from the proxy settings, be aware that NO_PROXY requires a specific syntax, meaning instead of using "*.domain.tld" or just "domain.tld", ".*.domain.tld" needs to be used.

Example: given the vCenter is vc.domain.tld, has the IP address ###.###.#.##, the proxy is proxy is called "proxy.domain.com" and the port it's using is TCP 8080 for both HTTP and HTTPS traffic, this is how the /etc/sysconfig/proxy should be looking:

# Enable a generation of the proxy settings to the profile.
# This setting allows to turn the proxy on and off while
# preserving the particular proxy setup.
#
PROXY_ENABLED="no"

# Some programs (e.g. wget) support proxies, if set in
# the environment.
# Example: HTTP_PROXY="http://proxy.provider.de:3128/"
HTTP_PROXY="http:/proxy.domain.tld:8080"

# Example: HTTPS_PROXY="https://proxy.provider.de:3128/"
HTTPS_PROXY="http://proxy.domain.tld:8080"

# Example: FTP_PROXY="http://proxy.provider.de:3128/"
FTP_PROXY=""

# Example: GOPHER_PROXY="http://proxy.provider.de:3128/"
GOPHER_PROXY=""

# Example: SOCKS_PROXY="socks://proxy.example.com:8080"
SOCKS_PROXY=""

# Example: SOCKS5_SERVER="office-proxy.example.com:8881"
SOCKS5_SERVER=""

# Example: NO_PROXY="www.me.de, do.main, localhost"
NO_PROXY="localhost, 127.0.0.1, vc.domain.com, ###.###.#.##"

Or, if required to exclude the traffic to the complete domain from being routed through the proxy:

...
# Example: NO_PROXY="www.me.de, do.main, localhost"
NO_PROXY="localhost, 127.0.0.1, .*.domain.com, ###.###.#.##"