Interactively review and attach to containers running in Nomad.
This is a PoC for running a series of calls to Hashicorp Nomad to get information about running jobs and allowing for container attachment through pre-defined flows. It's meant to be run as an interactive SSH application behaving similarly to a busybox session.
Taken from Nomad docs:
The general hierarchy for a job is:
job
\_ group
\_ task
Each job file has only a single job, however a job may have multiple groups, and each group may have multiple tasks. Groups contain a set of tasks that are co-located on a machine.
interactive-nomad-attach presents an option for users to select an allocation and attach directly against it or select
from a list of jobs and task groups if there are multiple. If users drop through the selection route they are randomly
assigned an allocation meeting that criteria.
See the sample config in the project.
To stand up Nomad, install via brew, apt, etc... and run via: nomad agent -dev, for ephemeral, local usage. Then, submit a sample job like:
job "redis" {
datacenters = ["dc1"]
update {
stagger = "10s"
max_parallel = 1
}
group "redis" {
restart {
attempts = 2
interval = "1m"
delay = "10s"
mode = "fail"
}
task "redis" {
driver = "docker"
config {
image = "redis:latest"
port_map {
db = 6379
}
}
service {
name = "${TASKGROUP}-redis"
port = "db"
check {
name = "alive"
type = "tcp"
interval = "10s"
timeout = "2s"
}
}
resources {
cpu = 500 # 500 MHz
memory = 256 # 256MB
network {
mbits = 10
port "db" {
}
}
}
}
}
}Finally, run main.go to interact with the flows.