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63 lines
3.1 KiB
Markdown
63 lines
3.1 KiB
Markdown
Dist Git
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========
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Dist Git is a remote Git repository specificaly designed to hold RPM package sources. It consists of three main modules:
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1. Git repository with permissions managed by [Gitolite](http://gitolite.com/gitolite/index.html)
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2. Lookaside cache to store source tarballs
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3. Scripts to manage
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How does it work
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----------------
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The Dist Git server repeatedly asks a package database for information about packages. This information contains a list of packages and other information. Each package can have a list of users or groups entitled to commit to this package and a list of platforms for which the package is built. Sources for each platform are held in corresponding branches.
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User cat interact with the Dist Git server using client probably based on [rpkg](https://fedorahosted.org/rpkg/). The client authenticates with an ssh certificate for git communication and with an http client certificate for uploads to the lookaside cache.
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### Package Database communication
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The following is an example JSON data comming from the Package Database which would create two packages: *copr-frontend* and *copr-backend*. The first package would be for Fedora 21 only and permissions to commit into this repo would be granted to users *mirek*, *adam* and anyone in the group *provenpackager*. The *copr-backend* package would be for Fedora 21 and CentOS 7. The permissions would be processed the same way as for the first package.
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```JSON
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"packageAcls": {
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"copr-frontend": {
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"fedora-21": {
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"commit": {
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"groups": ["provenpackager"],
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"people": ["mirek", "adam"]
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}
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}
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},
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"copr-backend": {
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"fedora-21": {
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"commit": {
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"groups": ["provenpackager"],
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"people": ["mirek", "valentin"]
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}
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},
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"centos-7": {
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"commit": {
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"groups": ["provenpackager"],
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"people": ["mirek", "valentin"]
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}
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}
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}
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}
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```
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The final result would consist of two package repositories:
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- *copr-frontend* with a single branch: *fedora-21*
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- *copr-backend* with two branches: *fedora-21* and *centos-7*
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### Client Authentication and Authorization
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In order to make changes in the package repositories, client needs to have a permission to do that. Both Git and Lookaside Cache have their own auth process.
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Git uses ssh communication and client authenticates with public key. Each user needs to have an account on the server and be in a *packager* group. Their ssh shell must be set to "`HOME=/var/lib/dist-git /usr/share/gitolite3/gitolite-shell %(username)s`" in order to have authorization working.
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Authorization is done by Gitolte. The configuration file describing all the permisions is automaticaly generated each time a Package Database is queried. Gitolite uses system users and groups.
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Lookaside Cache uses https communication and client authenticates with ssl client certificate. The Dist Git service provider needs to issue the client certificate for every user.
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There is no authentication needed in order to read from the server.
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