gshell is a simple pure golang service framework for linux devices.
Running a gshell daemon on a board/VM/container makes it a node in the gshell service mesh. Each node has an unique provider ID.
Each job runs in one dedicated GRE(Gshell Runtime Environment) which runs in a GRG(Gshell Runtime Group). GREs can be grouped into one named GRG for better performance.
gshell enters interactive mode if no options and no commands provided.
gshell features:
- Flexible running model
- Mixed execution mode to run go apps/services
- interpreted mode for flexibility, compiled mode for performance
- mix-used in runtime, easy to switch
- Isolated Gshell Runtime Environment(GRE)
- one service/app runs in one GRE
- GRE has separate OS input, output, args
- GREs share memory by communicating
- App/service group mechanism
- GREs can be grouped to run in one Gshell Runtime Group(GRG)
- applicable real-time scheduling policy on GRG
- zero communication cost in same GRG: zero data copy, no kernel round trip
- group/ungroup by gshell command line at runtime
- Remote deployment
- Mixed execution mode to run go apps/services
- Simplified and unified communication
- Name based service publishing/discovery
- a service is published under the name of {"publisher", "service"}
- 4 scopes of service visibility: Process, OS, LAN, WAN
- a service can be published in all the above scopes
- a service is discovered in the above scope order
- Message oriented client-server communication
- servers define message structs, clients import message structs
- simple Send(msg) Recv(msgPtr) API and RPC alike SendRecv(msgSnd, msgRcvPtr) API
- data encoding/serializing when necessary
- messages can be reordered by predefined priority
- High concurrency model
- client side multiplexed connection
- server side auto scale worker pool
- of course go routines and go channels
- Name based service publishing/discovery
- Zero deploy dependency on all CPU arch
- X86, ARM, MIPS, PPC...
- embedded boxes, cloud containers, server VMs...
- only one binary is needed
- Zero cost for service/app migration between different scopes/machines/locations
- no code change, no recompile, no redeploy
- gshell command line to move services/apps around at runtime
- Auto update without impacting the running services
- Interactive and native debugging with built-in REPL shell
- P2P network model
- zero config, self discovered and managed network
- auto reverse proxy for service behind NAT
