Provides on-demand unindexed search for repositories. It scans through a git archive fetched from gitserver to find results, similar in nature to git grep.
This service should be scaled up the more on-demand searches that need to be done at once. For a search the frontend will scatter the search for each repo@commit across the replicas. The frontend will then gather the results. Like gitserver this is an IO and compute bound service. However, its state is just a disk cache which can be lost at anytime without being detrimental.