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Cacher

Cacher is a python script that will parse the OS X Caching Server debug logs and present you (to the best of its abilities) serving statistics.

Some of the things Cacher can display:

• Total bandwidth served to clients
• Total bandwidth requested from Apple
• Total bandwidth requested from other Caching servers
• Total IP Addresses
• Total Unique IP Addresses.
• Total iOS download requests including model type
• Total OS download requests specified by type (iOS and macOS)
• Total applications downloaded from Apple Configurator 2 devices
• Total downloaded files
• Total eBook (.epub) files
• Total personal iCloud files
• Total package (.pkg) files
• Total iOS application (.ipad) files
• Total Zip (.zip) files
• Total unique downloaded files
• Total unique eBook (.epub) files
• Total unique personal iCloud files
• Total unique package (.pkg) files
• Total unique iOS application (.ipad) files
• Total unique Zip (.zip) files

Server support

Cacher currently supports Server 5.2 and higher.

• For Server 4 please see this commit
• For Server 5-5.1 please see this commit

Usage

Usage: cacher.py [options]

Options:
  -h, --help            show this help message and exit
  --targetdate=TARGETDATE
                        Optional: Date to parse. Example: 2017-01-15.
  --logpath=LOGPATH     Optional: Caching Log Path. Defaults to:
                        /Library/Server/Caching/Logs
  --deviceids           Optional: Use Device IDs (Ex: iPhone7,2). Defaults to:
                        False
  --nostdout            Optional: Do not print to standard out
  --configureserver     Optional: Configure Server to log Client Data
  --serveralert         Optional: Send Server Alert
  --slackalert          Optional: Use Slack
  --slackwebhook=SLACKWEBHOOK
                        Optional: Slack Webhook URL. Requires Slack Option.
  --slackusername=SLACKUSERNAME
                        Optional: Slack username. Defaults to Cacher. Requires
                        Slack Option.
  --slackchannel=SLACKCHANNEL
                        Optional: Slack channel. Can be username or channel.
                        Ex. #channel or @username. Requires Slack Option.

Optional features

The following are optional features:

Configure Caching service logging

By default, the Caching service will not log the model and iOS/OS X version. In order to get true results from this script, run the following command (as root):

sudo cacher.py --configureserver

If successful, you will see the following output:

Caching Server settings are now: caching:LogClientIdentity = yes

Target date

By default, Cacher will use look for logs from the previous date. To target logs from a custom date, use the --targetdate option.

cacher.py --targetdate "2016-11-28"

Log path

By default, Cacher will use look for logs from in /Library/Server/Caching/Logs. To target logs in a custom path, use the --logpath option.

cacher.py --logpath "/path/to/logs"

DeviceIDs

By default, Cacher will use the "Friendly Names" for iOS devices. To use the model Device ID, use the --deviceids option.

cacher.py --deviceids

Device IDs Example:

A total of 3513 iOS downloads were requested from the Caching Server yesterday consisting of:
 A total of 4 Apple TV downloads
 A total of 417 iPad downloads
 A total of 3075 iPhone downloads
 A total of 17 iPod downloads
  4 AppleTV5,3
  4 iPad2,1
  7 iPad2,2
  2 iPad2,3
  5 iPad2,4

Friendly Names Example:

A total of 3513 iOS downloads were requested from the Caching Server yesterday consisting of:
 A total of 4 Apple TV downloads
 A total of 417 iPad downloads
 A total of 3075 iPhone downloads
 A total of 17 iPod downloads
  4 5th Generation Apple TVs
  5 iPad 2nd Generation [M2012 Wifi Revision]
  2 iPad 2nd Generation [Wifi + CDMA]
  7 iPad 2nd Generation [Wifi + GSM]
  4 iPad 2nd Generation [Wifi]

No Standard output

By default, Cacher will print the results to standard out. To skip this use the --nostdout option.

cacher.py --nostdout

Server alert

By default, Cacher will no longer send a server alert. To send a server alert, use the --serveralert option.

Please note that this option requires root/sudo level permissions.

sudo cacher.py --serveralert

If you attempt to use this option without elevated permissions, Cacher will write the following note to standard out.

Did not send serverAlert - requires root

Slack alert

By default, Cacher will not send a server alert. To send a server alert, use the --slackalert option.

The slack alert requires two other options to be passed:

• --slackchannel
• --slackwebhook

Username or Channel

You can pass both an username or channel via the --slackchannel option: Examples:

• @erik
• #cacher

Slack webhook

A slack webhook must be created. To create a webhook, please go here

cacher.py --slackalert \
--slackchannel "@egomez" \
--slackwebhook "https://hooks.slack.com/services/YOURURL"``

Screenshots

Slack Small

Slack Large

Original Server Alert