base on Gossip-based service discovery (and more) for large distributed systems. # Corrosion Gossip-based service discovery (and more) for large distributed systems. ## Why we built Corrosion We built Corrosion specifically for service discovery across a large global network, replacing Consul’s central state database with eventually consistent state distributed across our hosts. Our new tool needed to deliver the following: ### Fast reads and writes Getting state (data) from a central remote source can be incredibly expensive (at least 300ms for a round-trip to something on the other side of the world), but usually takes less than 1ms from a local source. ### Fast, eventual, consistency Many use cases can cope with eventual consistency, especially if a consistent state is attained sooner than later. Raft fell short for some use cases at Fly.io where round-trips to a centralized location are too expensive. ### Flexibility Global state for a distributed system isn't one-size-fits-all. Flexible schemas and queries are essential. ## How Corrosion works In a nutshell, Corrosion: - Maintains a SQLite database on each node - Gossips local changes throughout the cluster - Uses [CR-SQLite](https://github.com/vlcn-io/cr-sqlite) for conflict resolution with CRDTs - Uses [Foca](https://github.com/caio/foca) to manage cluster membership using a SWIM protocol - Periodically synchronizes with a subset of other cluster nodes, to ensure consistency ## Features - A flexible API to read from and write to Corrosion's store using SQL statements - File-based schemas with on-the-fly updates - HTTP streaming subscriptions based on SQL queries - Live population of configuration files from Corrosion state with user-defined [Rhai](https://rhai.rs/) templates - Storage and propagation of state from locally registered Consul services, replacing the central database with Corrosion's distributed state - Secure peer-to-peer communication with the [QUIC](https://datatracker.ietf.org/doc/html/rfc9000) transport protocol (using [Quinn](https://github.com/quinn-rs/quinn)) ## Usage overview Run the Corrosion agent on every node/host in the cluster. Other programs running on the node use [Corrosion's HTTP API](https://superfly.github.io/corrosion/api/index.html) to query the local Corrosion SQLite database, add and update data, and subscribe to change notifications. The [Corrosion CLI](https://superfly.github.io/corrosion/cli/index.html) provides commands for administration and access to database and features. ### Quick start - [Prepare the Corrosion configuration file](https://superfly.github.io/corrosion/config/) - [Specify the initial database schema](https://superfly.github.io/corrosion/schema.html) - [Start the Corrosion agent](https://superfly.github.io/corrosion/cli/agent.html) See the WIP [Corrosion documentation](https://superfly.github.io/corrosion/) for more details. ## Building Corrosion Clone [https://github.com/superfly/corrosion.git](https://github.com/superfly/corrosion.git). From within the repo directory: ``` cargo build --release && mv target/release/corrosion ./ ``` ", Assign "at most 3 tags" to the expected json: {"id":"2308","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"