From cade6c0d7e5e2e3816bc286eaf24e8c47d350730 Mon Sep 17 00:00:00 2001 From: Louis Abel Date: Mon, 31 Oct 2022 22:38:21 -0700 Subject: [PATCH] add mirror manager SOP --- docs/sop/.pages | 2 + docs/sop/sop_mirrormanager2.md | 130 +++++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) create mode 100644 docs/sop/sop_mirrormanager2.md diff --git a/docs/sop/.pages b/docs/sop/.pages index 8ff870e..2055c64 100644 --- a/docs/sop/.pages +++ b/docs/sop/.pages @@ -2,4 +2,6 @@ nav: - ... | index.md - Release Procedures: sop_release.md + - Generalized Prep Checklist for Upcoming Releases: sop_upstream_prep_checklist.md + - Mirror Manager: sop_mirrormanager2.md ... diff --git a/docs/sop/sop_mirrormanager2.md b/docs/sop/sop_mirrormanager2.md new file mode 100644 index 0000000..1ac951d --- /dev/null +++ b/docs/sop/sop_mirrormanager2.md @@ -0,0 +1,130 @@ +--- +title: Mirror Manager Maintenance +--- + +This SOP contains most if not all the information needed for SIG/Core to +maintain and operate Mirror Manager for Rocky Linux. + +## Contact Information + +| | | +| - | - | +| **Owner** | SIG/Core (Release Engineering & Infrastructure) | +| **Email Contact** | infrastructure@rockylinux.org | +| **Email Contact** | releng@rockylinux.org | +| **Mattermost Contacts** | `@label` `@neil` `@tgo` | +| **Mattermost Channels** | `~Infrastructure` | + +## Introduction + +So you made a bad decision and now have to do things to Mirror Manager. Good +luck. + +## Pieces + +| **Item** | Runs on... | Software | +|-------------------|------------------|---------------------------------------------------| +| Mirrorlist Server | mirrormanager001 | https://github.com/adrianreber/mirrorlist-server/ | +| Mirror Manager 2 | mirrormanager001 | https://github.com/fedora-infra/mirrormanager2 | + +### Mirrorlist Server + +This runs two (2) instances. Apache/httpd is configured to send `/mirrorlist` +to one and `/debuglist` to the other. + +* Every fifteen (15) minutes: Mirrorlist cache is regenerated + + * This queries the database for active mirrors and other information and writes a protobuf. The mirrorlist-server reads the protobuf and responds accordingly. + +* Every twenty (20) minutes: Service hosting `/mirrorlist` is restarted +* Every twenty-one (21) minutes: Service hosting `/debuglist` is restarted + +Note that the timing for the restart of the mirror list instances are arbitrary. + +### Mirror Manager 2 + +This is a uwsgi service fronted by an apache/httpd instance. This is responsible +for everything else that is not `/mirrorlist` or `/debuglist`. This allows the +mirror managers to, well, manage their mirrors. + +### CDN + +Fastly sits in front of mirror manager. VPN is required to access the `/admin` endpoints. + +If the backend of the CDN is down, it will attempt to guess what the user wanted to access and spit out a result on the dl.rockylinux.org website. For example, a request for AppStream-8 and x86_64 will result in a `AppStream/x86_64/os` directory on dl.rockylinux.org. Note that this isn't perfect, but it helps in potential down time or patching. + +``` +Fastly -> www firewall -> mirrormanager server +``` + +## Tasks + +Below are a list of possible tasks to take with mirror manager, depending on the scenario. + +### New Release + +For the following steps, the following must be completed: + +* Production rsync endpoints should have all brand new content +* New content root should be locked down to 750 (without this, mirror manager cannot view it) +* Disable mirrormanager user cronjobs + +1. Update the database with the new content. This is run on a schedule normally (see previous section) but can be done manually. + + a. As the mirror manager user, run the following: + +``` +/opt/mirrormanager/scan-primary-mirror-0.4.2/target/debug/scan-primary-mirror --debug --config $HOME/scan-primary-mirror.toml --category 'Rocky Linux' +/opt/mirrormanager/scan-primary-mirror-0.4.2/target/debug/scan-primary-mirror --debug --config $HOME/scan-primary-mirror.toml --category 'Rocky Linux SIGs' +``` + +2. Update the redirects for `$reponame-$releasever` + + a. Use psql to mirrormanager server: `psql -U mirrormanager -W -h mirrormanager_db_host mirrormanager_db` + b. Confirm that all three columns are filled and that the second and third columns are identical: `select rr.from_repo AS "From Repo", rr.to_repo AS "To Repo", r.prefix AS "Target Repo" FROM repository_redirect AS rr LEFT JOIN repository AS r ON rr.to_repo = r.prefix GROUP BY r.prefix, rr.to_repo, rr.from_repo ORDER BY r.prefix ASC;` + c. Change the `majorversion` redirects to point to the new point release, for example: `update repository_redirect set to_repo = regexp_replace(to_repo, '9\.0', '9.1') where from_repo ~ '(\w+)-9';` + +3. Generate the mirrorlist cache and restart the debuglist and verify. + +Once the bitflip is initiated, restart mirrorlist and reenable all cronjobs. + +### Out-of-date Mirrors + +1. Get current shasum of repomd.xml. For example: `shasum=$(curl https://dl.rockylinux.org/pub/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml | sha256sum)` +2. Compare against latest propagation log: + +``` +tail -latr /var/log/mirrormanager/propagation/rocky-9.0-BaseOS-x86_64_propagation.log.*` + +export VER=9.0 +awk -v shasum=$(curl -s https://dl.rockylinux.org/pub/rocky/$VER/BaseOS/x86_64/os/repodata/repomd.xml | sha256sum | awk '{print $1}') -F'::' '{split($0,data,":")} {if ($4 != shasum) {print data[5], data[6], $2, $7}}' < $(find /var/log/mirrormanager/propagation/ -name "rocky-${VER}-BaseOS-x86_64_propagation.log*" -mtime -1 | tail -1)' +``` + +This will generate a table. You can take the IDs in the first column and use the database to disable them by ID (table name: hosts) or go to https://mirrors.rockylinux.org/mirrormanager/host/ID and uncheck 'User active'. + +Users can change user active, *but* they cannot change admin active. It is better to flip user active in this case. + +Admins can also view https://mirrors.rockylinux.org/mirrormanager/admin/all_sites if necessary. + +Example of table columns: + +``` +[mirrormanager@ord1-prod-mirrormanager001 propagation]$ awk -v shasum=$(curl -s https://dl.rockylinux.org/pub/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml | sha256sum | awk '{print $1}') -F'::' '{split($0,data,":")} {if ($4 != shasum) {print data[5], data[6], $2, $7}}' < rocky-9.0-BaseOS-x86_64_propagation.log.1660611632 | column -t +164 mirror.host.ag http://mirror.host.ag/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +173 rocky.centos-repo.net http://rocky.centos-repo.net/9.0/BaseOS/x86_64/os/repodata/repomd.xml 403 +92 rocky.mirror.co.ge http://rocky.mirror.co.ge/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +289 mirror.vsys.host http://mirror.vsys.host/rockylinux/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +269 mirrors.rackbud.com http://mirrors.rackbud.com/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +295 mirror.ps.kz http://mirror.ps.kz/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +114 mirror.liteserver.nl http://rockylinux.mirror.liteserver.nl/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +275 mirror.upsi.edu.my http://mirror.upsi.edu.my/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +190 mirror.kku.ac.th http://mirror.kku.ac.th/rocky-linux/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +292 mirrors.cat.pdx.edu http://mirrors.cat.pdx.edu/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +370 mirrors.gbnetwork.com http://mirrors.gbnetwork.com/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +308 mirror.ihost.md http://mirror.ihost.md/rockylinux/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +87 mirror.freedif.org http://mirror.freedif.org/Rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +194 mirrors.bestthaihost.com http://mirrors.bestthaihost.com/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +30 mirror.admax.se http://mirror.admax.se/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 200 +195 mirror.uepg.br http://mirror.uepg.br/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404 +247 mirrors.ipserverone.com http://mirrors.ipserverone.com/rocky/9.0/BaseOS/x86_64/os/repodata/repomd.xml 404' +```