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Nomad auto-revert test
#/bin/bash
# Creates a stable test job with auto_revert=true in Nomad,
# updates it a bunch of times to force the job version to 256,
# then creates an unstable job. Nomad will roll back to 255
# instead of 256.
sudo tee /tmp/pass.nomad << EOF > /dev/null
job "test" {
datacenters = ["dc1"]
region = "global"
type = "service"
update {
health_check = "task_states"
min_healthy_time = "1s"
healthy_deadline = "5s"
auto_revert = "true"
}
group "pass" {
count = 1
task "tail" {
driver = "exec"
config {
command = "tail"
args = [
"-f", "/dev/null",
]
}
}
}
}
EOF
sudo tee /tmp/fail.nomad << EOF > /dev/null
job "test" {
datacenters = ["dc1"]
region = "global"
type = "service"
update {
health_check = "task_states"
min_healthy_time = "1s"
healthy_deadline = "5s"
auto_revert = "true"
}
group "fail" {
count = 1
task "tail" {
driver = "exec"
config {
command = "tail"
args = [
"-f", "/dev/DNE",
]
}
}
}
}
EOF
ver=0
while [ $ver -lt 256 ]; do
echo "Version: $ver"
sed -E "s/ task \"tail(_[0-9])?[0-9]*\" \{/ task \"tail_${ver}\" \{/" /tmp/pass.nomad > /tmp/test.nomad
nomad run /tmp/test.nomad
stable=$(nomad job history -json -version $ver test 2>/dev/null | jq '.Stable')
while [ "$stable" != "true" ]; do
stable=$(nomad job history -json -version $ver test 2>/dev/null | jq '.Stable')
done
ver=$(($ver+1))
done
# Create stable version 256
sed -E "s/ task \"tail(_[0-9])?[0-9]*\" \{/ task \"tail_256\" \{/" /tmp/pass.nomad > /tmp/test.nomad
nomad run /tmp/test.nomad
nomad deployment list | head
nomad job status test
nomad job history test
# Create unstable version 257
nomad run /tmp/fail.nomad
sleep 5
# Note that it rolls back to 255 instead of 256
nomad deployment list | head
nomad job status test
nomad job history test
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