Netbox

Netbox is a "IP address management (IPAM) and data center infrastructure management (DCIM) tool".

• https://github.com/digitalocean/netbox

At Wikimedia it has been evaluated in Phab:T170144 as a replacement for Racktables.

In Phab:T199083 the actual migration between the systems took place.

Web UI

• https://netbox.wikimedia.org/
• login using your LDAP/Wikitech credentials
• Currently you need an LDAP group membership in "ops" to be able to login

Backups

The following paths are backed up in Bacula:

/srv/netbox-dumps/
/srv/postgres-backup/

A puppetized cron job (class postgresql::backup) automatically creates a daily dump file of all local Postgres databases (pg_dumpall) and stores it in /srv/postgres-backup.

This path is then backed up by Bacula.

For more details, the related subtask to setup backups was Phab:T190184.

Restore

To restore files from Bacula back to the client, use bconsole on helium and refer to Bacula#Restore_(aka_Panic_mode) for detailed steps.

To restore postgres databases from a dump file:

• unzip the latest dump file from /srv/postgres-backup
• sudo -u postgres /usr/bin/psql < psql-all-dbs-20180804.sql

Some more details from when restore was tested on Phab:T190184#4481629.

Automatic CSV Dumps

Each hour at :37, a script dumps most pertinent tables to a target directory in /srv/netbox-dumps with a timestamp. Sixteen of these dumps are retained for backup purposes, which is executed by the script in /srv/deployment/netbox/deploy/scripts/rotatedump. This script only rotates directories in the pattern 20*, so if a manual, retained dump is desired, one can simply run the script (su netbox -c /srv/deployment/netbox/deploy/scripts/rotatedump) and rename the resulting dump outside of this pattern, perhaps with a descriptive prefix.

Note that historical copies are also available from Bacula, as this is one of the directories that are backed up.

Dumping Database for Testing Purposes

The Netbox database contains a few bits of sensitive information, and if it is going to be used for testing purposes in WMCS it should be sanitized first.

1. Create a copy of the main database createdb netbox-sanitize && pg_dump netbox | psql netbox-sanitize
2. Run the below SQL code on netbox-sanitize database.
3. Dump and drop database pg_dump netbox-sanitize > netbox-sanitized.sql; dropdb netbox-sanitize

-- truncate secrets
TRUNCATE secrets_secret CASCADE;
TRUNCATE secrets_sessionkey CASCADE;
TRUNCATE secrets_userkey CASCADE;

-- sanitize dcim_serial
UPDATE dcim_device SET serial = concat('SERIAL', id::TEXT);

-- truncate user table
TRUNCATE auth_user CASCADE;

-- sanitize dcim_interface.mac_address
UPDATE dcim_interface SET mac_address = CONCAT(
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0'), ':',
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0'), ':',
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0'), ':',
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0'), ':',
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0'), ':',
                   LPAD(TO_HEX(FLOOR(random() * 255 + 1) :: INT)::TEXT, 2, '0')) :: macaddr;

-- sanitize cricuits_circuit.cid
UPDATE circuits_circuit SET cid = concat('CIRCUIT', id::TEXT);

Custom Links

Netbox allow to setup custom links to other websites using Jinja2 templating for both the visualized name and the actual link, allowing for quite some flexibility. The current setup (as of Feb. 2020) has the following links:

• Grafana (for all physical devices and VMs)
• Icinga (for all physical devices and VMs)
• Debmonitor (for all physical devices and VMs)
• Procurement Ticket (only for physical devices that have a ticket that matches either Phabricator or RT)
• Hardware config (for Dell and HP physical devices, pointing to the manufacturer page for warranty information based on their serial number)

Reports

Netbox reports are a way of validating data within Netbox. They are available in https://netbox.wikimedia.org/extras/reports/., and are defined in the repository https://gerrit.wikimedia.org/r/plugins/gitiles/operations/software/netbox-reports/.

In summary, reports produce a series of log lines that indicate some status connected to a machine, and may be either error, warning, or success. Log lines with no particular disposition for information purposes may also be emitted.

Report Conventions

Because of limitations to the UI for Netbox reports, certain conventions have emerged:

1. Reports should emit one log_error line for each failed item. If the item doesn't exist as a Netbox object, None may be passed in place of the first argument.
2. If any log_warning lines are produced, they should be grouped after the loop which produces log_error lines.
3. Reports should emit one log_success which contains a summary of successes, as the last log in the report.
4. Log messages referring to a single object should be formatted like <verb/condition> <noun/subobject>[: <explanatory extra information>]. Examples:
   1. malformed asset tag: WNF1212
   2. missing purchase date
5. Summary log messages should be formatted like <count> <verb/condition> <noun/subobject>

Report Alert

The report results are at https://netbox.wikimedia.org/extras/reports/

Most reports that alert are non-critical data integrity mismatches due to changes in infrastructure, as a secondary check, and the responsibility of DC-ops.

Reports and their Errors

Report	Typical Responsibility	Typical Error(s)
Accounting	Faidon or DC-ops
Cables	DC-ops
Coherence (does not alert)
LibreNMS	DC-ops or Netops
Management	DC-ops
PuppetDB	Whoever changed / reimaged host	<device> missing from PuppetDB or <device> missing from Netbox. These occur because the data in PuppetDB does not match the data in Netbox, typically related to missing devices or unexpected devices. Generally these errors fix themselves once the reimage is complete, but the Netbox record for the host may need to be updated for decommissioning and similar operations.
Juniper (does not alert)	DC-ops or Netops

Juniper Report

The Juniper Installed Base report needs manual steps to be updated:

1. Login to my.juniper.net
2. Go to the Products tab
3. Hit the export button, select "No filter, All Columns, and Accounts" then Export
4. Download the spreadsheet from the 🔔 (Notification) menu.
5. Copy it to netbox1001.wikimedia.org:/tmp/juniper_installed_base.csv
6. Run the report

A possible future evolution is to query that data directly from Juniper's APIs.

Exports

Set of resources that exports Netbox data in various formats.

DNS

A git repository of DNS zonefile snippets generated from Netbox data and exported via HTTPS in read-only mode to be consumed by the DNS#Authoritative_nameservers and the Continuous Integration tests run for the operations/dns Gerrit repository. The repository is available via:

 $ git clone https://netbox-exports.wikimedia.org/dns.git

To update the repository, see DNS/Netbox#Update_generated_records.