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Redis and MongoDB

Redis

Section titled “Redis”

The Redis entry appears for a container with redis-cli, and Redis (app) for the Redis the Laravel app uses. The password comes from REDIS_PASSWORD or REDIS_URL and is passed through REDISCLI_AUTH, never with -a.

The commands are read-only:

  • Info and stats: INFO sections, DBSIZE, CLIENT LIST;
  • Keys: a sample of keys and their count, using SCAN, never KEYS *; the key distribution; SLOWLOG GET 10;
  • Configuration: maxmemory, maxmemory-policy, save, appendonly;
  • Maintenance: PING, LASTSAVE, LATENCY DOCTOR;
  • Backup: an RDB snapshot (redis-cli --rdb) saved to your downloads folder.

Redis keys

Section titled “Redis keys”

Redis keys (for the container’s Redis) and Redis keys (app) (for the Redis the app uses) on the Data tab find keys by pattern and show their values.

The screen starts with the pattern *. / edits it: laravel_cache:*, *session*. enter scans with the new pattern.

Each key is listed with its type, its expiry and its size: the bytes of a string, or the number of items of a hash, list, set, sorted set or stream.

Key Action
/ Edit the pattern
enter The key’s value
D Delete the key
r Scan again

The value is laid out by type: a string, a hash’s fields, a list’s items, a set’s members, a sorted set’s scores, a stream’s entries. Only the first 200 items or 64 KB are read.

D deletes the key with UNLINK after a confirmation, and the keys are scanned again. A read-only server refuses it.

The scan is bounded so it never blocks a busy server: at most 100 SCAN steps and 500 keys. When it stops early, the title says so: narrow the pattern to see the rest. Each read is one Lua script, so keys with spaces or quotes are safe, and the password goes over stdin as for the other commands.

MongoDB

Section titled “MongoDB”

The MongoDB entry appears for a container with mongosh or the older mongo shell. Root credentials come from MONGO_INITDB_ROOT_USERNAME and MONGO_INITDB_ROOT_PASSWORD, or from MONGO_URL / MONGODB_URI. With mongosh they are read inside the script, so they never appear on a command line.

  • Info and stats: version, server status, databases, db.stats(), operations in progress;
  • Collections: document counts and sizes;
  • Indexes of every collection;
  • Maintenance: ping, replica set status, profiling;
  • Backup: mongodump --archive --gzip, restored with mongorestore --archive=… --gzip.