Repository egress

Users generate Repository egress events for every fetch operation in Git. It includes commands like git clone, git fetch and git pull, because all of them request data from Gitaly that needs to be delivered to the end user.

Two main clients of Gitaly traffic are GitLab Shell(for SSH traffic) and Workhorse (for HTTP traffic).

Both clients send git-upload-pack command to Gitaly and stream back the Git response that contains requested changes.

Current metrics

Service	Number of git-upload-pack events (per day)
Workhorse	~80 million
GitLab Shell	~85 million
Gitaly	~165 million (combined traffic)

Kibana links to see current metrics for each service:

• Workhorse
• GitLab Shell
• Gitaly

Total number of events:

• 165 million per day
• 7.5 million per hour
• 120 thousand per minute

Logs structure

HTTP traffic

Captured in Workhorse logs.

Fields	Description
written_bytes	number of bytes transferred
uri	namespace and project name
timestamp	timestamp of Egress event

SSH traffic

Captured in GitLab Shell logs.

Fields	Description
written_bytes	number of bytes transferred
project	full project name
root_namspace	root namespace
timestamp	timestamp of Egress event