nats-ab

= NATS-AB

Compliance tool to check 2 NATS users: `NATS_USER` - according GitOps approach this user not allowed to create JetStream Stream or Consumers

SLO:

* `NATS_USER` - according GitOps approach this user not allowed to create JetStream Stream or Consumers
* `NATS_STREAM_USER` - this user applicable for create JS as user in GitOps job
* `NATS_USER` - can send and read messages via JS

== Install
=== download
https://github.com/d7561985/nats-ab/releases

=== golang
Go 1.16+
[bash]
----
go install github.com/d7561985/nats-ab@latest
----

Go version < 1.16
[bash]
----
go get -u github.com/d7561985/nats-ab@latest
----

== Use-cases
=== mode
To check leaf: put mode = 1 in hub cluster and 2 in leaf.

NOTE: first create leaf subscriber

=== replica
Check performance with different replica value in cluster

=== threads
Examine number of threads (services) producers or consumer.


== How to use
CLI support help command where you will find everything suitable:
[bash]
----
NAME:
   <help name> - run compliance scenario tests

USAGE:
   <usage text>

DESCRIPTION:
   <description>

OPTIONS:
   --mode value                          Some scenarios required 2 or more applications launches (between leaf nodes), value: 0: send and receive, 1: only send, 2: only receive (default: 0) [$MODE]
   --count value                         messages to publish/receive (default: 1000000) [$MSG_NUM]
   --msgSize value                       messages to publish/receive (default: 128) [$MSG_SIZE]
   --threads value                       consent execution (default: 5) [$THREADS]
   --drainTime value                     wait before clean up after scenario (default: 30s) [$DRAIN_TIME]
   --addr value                          NATS URI list (default: "nats://127.0.0.1:4222") [$NATS_ADDR]
   --replicas value                      stream reapplication usage (default: 1) [$REPLICAS]
   --accUser value, -u value             none sys account user who will send or read messages (default: "client") [$ACC_USER]
   --accUserPassword value, -p value     password for accUser (default: ****) [$ACC_USER_PASSWORD]
   --accAdmin value, -a value            none sys account user admin with no restriction (default: "admin") [$ACC_ADMIN]
   --accAdminPassword value, --ap value  password for accAdmin (default: ****) [$ACC_ADMIN_PASSWORD]
   --sysUser value                       sys account user [$SYS_USER]
   --sysPassword value                   sysUser password (default: ****) [$SYS_USER_PASSWORD]
   --help, -h                            show help (default: false)
----

== TEST
=== Scenario #1
Positive test.

1. `NATS_STREAM_USER` create stream and consumer with `REPLICAS` num.
1. `NATS_USER` send message `PUSH_NUM` times
1. `NATS_USER` tries to reed them.