sightingdb 0.7.2

A database designed for Sightings, a technique to count items
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# node-a — see the header of docker-compose.yml for the shape of the galaxy.

[daemon]
listen_ip = "0.0.0.0"
listen_port = 9999
authenticate = true
daemonize = false
ssl = false

dbdir = "/var/lib/sightingdb"
snapshot_interval = 300
sweep_interval = 60

# Unique in the galaxy. Sightings are counted per node, and two nodes sharing a
# name would each take the other's for its own.
node_id = "node-a"

[storage]
default_tier = "hot"
warm_idle = 3600
tiers_file = "/var/lib/sightingdb/tiers.toml"

# Absent means everything. A full mirror: it holds every namespace the load
# balancer sends it, including ones created after it started.

[galaxy]
health_interval = 5
# Short so a node that was stopped visibly catches up when it comes back. It
# asks each peer what it holds, compares, and pulls what it is missing — and it
# only ever pulls namespaces it stores itself.
sync_interval = 30
# A node counts its own sightings, so it has no router's tally to repair.
reconcile_interval = 0
gossip_interval = 0
# Only the other full mirror. There is nothing to catch up from node-c: it
# holds a subset of what this node holds, so anything it has, this node was
# sent too. node-c points *here* instead, which is the direction that helps.
peers = [
  { url = "http://node-b:9999", key = "peer-full" },
]

# Keys, declared here rather than in a file so that this demo can show the one
# thing that matters about a peer key: it is a capability, and the *peer*
# decides what it opens.
#
# A file would be rewritable from the management interface, which is better in
# earnest — but an acl_file that does not exist yet starts empty and would
# discard these, so the demo would lose the point it is making. The load
# balancer has the writable files instead, since that is where you would open
# the interface.
[acl]
# For poking at this node directly: curl -H 'Authorization: demo' ...
"demo" = "rw, admin"
# What the load balancer uses here. "rw" everywhere, because a full mirror has
# to be able to take a write to any namespace.
"lb-full" = "rw"
# What the other nodes use when they catch up from this one. Read-only: pulling
# is a read, and a peer catching up has no business writing here.
"peer-full" = "r"