/nats-commands

NATS Commands

Basic

// Check NATS-Cli version
nats --version

// Check NATS-Server version
nats-server --version

// Run NATS-Server
nats-server
// Run NATS-Server with jetstream
nats-server -js

// Run NATS-Server on specific IP:Port
nats-server -js -a 127.0.0.1 -p 4221

// Run NATS-Server using configuration
nats-server -js -c nats.conf
# nats.conf
listen:172.0.0.1:4221

Intermediate

// List streams
nats str ls -a 

// list streams of specific server
nats str ls -s "nats://127.0.0.1:4221"

// List stream report
nats str report -s "nats://127.0.0.1:4221"

// Remove streams
nats str rm -s "nats://127.0.0.1:4221"

// Subscribe to streams
nats sub "subject" -s "nats://127.0.0.1:4221"

// Publish message to streams
nats pub "subject" "this is message" -s "nats://127.0.0.1:4221"
// list streams of specific server
nats str ls -s "nats://user:pass@127.0.0.1:4221"

// List stream report
nats str report -s "nats://user:pass@127.0.0.1:4221"

// Remove streams
nats str rm -s "nats://user:pass@127.0.0.1:4221"

// Subscribe to streams
nats sub "subject" -s "nats://user:pass@127.0.0.1:4221"

// Publish message to streams
nats pub "subject" "this is message" -s "nats://user:pass@127.0.0.1:4221"

// Check subjects on nats stream
nats str subjects -s "nats://user:pass@127:0.0.1:4221"

// Ping nats server
nats -s "nats://user:pass@127.0.0.1:4221" rtt

Advance

// install nats server as windows service
SC.EXE create nats-server1 binPath="C:\nats-server.exe -js"

// install nats server as windows service with arguments
SC.EXE create nats-server2 binPath="C:\nats-server.exe -js -a 127.0.0.1 -p 4221"

// install nats server as windows service with config
SC.EXE create nats-server3 binPath="C:\nats-server.exe -js -c C:\nats.conf"

// install nats server as windows service with config and event logging
SC.EXE create nats-server3 binPath="C:\nats-server.exe -js -D -c C:\nats.conf"

// install nats server as windows service with config, event+message logging and auto start
SC.EXE create nats-server4 binPath="C:\nats-server.exe -js -DV -c C:\nats.conf" start=delayed-auto

//create context
nats context save contextName -s "nats://user:passwd@IP:Port" --description "this is description of this context"

//create show list
nats context ls

//create select a context
nats context select

//create delete a context
nats context rm contextName
# nats.conf
server_name: Node1
listen: 127.0.0.1:4222

jetstream {
   store_dir: C:/nats-server/storage/node1
   max_memory_store: 5368709120
   max_file_store: 322122547200
}

system_account: SYS

logfile_size_limit: 50MB
log_file: "C:/nats-logs/node1.log"

Cluster

Server 1 (host_a)

server_name=n1-c1
listen=4222

accounts {
  $SYS {
    users = [
      { user: "admin",
        pass: "$2a$11$DRh4C0KNbNnD8K/hb/buWe1zPxEHrLEiDmuq1Mi0rRJiH/W25Qidm"
      }
    ]
  }
}

jetstream {
   store_dir=/nats/storage
}

cluster {
  name: C1
  listen: 0.0.0.0:6222
  routes: [
    nats://host_b:6222
    nats://host_c:6222
  ]
}

Server 2 (host_b)

server_name=n2-c1
listen=4222

accounts {
  $SYS {
    users = [
      { user: "admin",
        pass: "$2a$11$DRh4C0KNbNnD8K/hb/buWe1zPxEHrLEiDmuq1Mi0rRJiH/W25Qidm"
      }
    ]
  }
}

jetstream {
   store_dir=/nats/storage
}

cluster {
  name: C1
  listen: 0.0.0.0:6222
  routes: [
    nats://host_a:6222
    nats://host_c:6222
  ]
}

Server 3 (host_c)

server_name=n3-c1
listen=4222

accounts {
  $SYS {
    users = [
      { user: "admin",
        pass: "$2a$11$DRh4C0KNbNnD8K/hb/buWe1zPxEHrLEiDmuq1Mi0rRJiH/W25Qidm"
      }
    ]
  }
}

jetstream {
   store_dir=/nats/storage
}

cluster {
  name: C1
  listen: 0.0.0.0:6222
  routes: [
    nats://host_a:6222
    nats://host_b:6222
  ]
}

// ls servers of specific cluster
nats server ls -s "nats://sysuser:pass@127.0.0.1:4221"