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dagger/pkg/alpha.dagger.io/aws/elb/elb.cue
Andrea Luzzardi 282759c0e5 cue modules: move stdlib to pkg/alpha.dagger.io
In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>
2022-01-11 13:16:37 -08:00

86 lines
1.8 KiB
CUE

// AWS Elastic Load Balancer (ELBv2)
package elb
import (
"alpha.dagger.io/dagger/op"
"alpha.dagger.io/aws"
)
// Returns an unused rule priority (randomized in available range)
#RandomRulePriority: {
// AWS Config
config: aws.#Config
// ListenerArn
listenerArn: string @dagger(input)
// Optional vhost for reusing priorities
vhost?: string @dagger(input)
// exported priority
priority: out @dagger(output)
out: {
string
#up: [
op.#Load & {
from: aws.#CLI & {
"config": config
}
},
op.#Exec & {
args: [
"/bin/bash",
"--noprofile",
"--norc",
"-eo",
"pipefail",
#"""
if [ -s "$VHOST" ]; then
# We passed a vhost as input, try to recycle priority from previously allocated vhost
priority=$(aws elbv2 describe-rules \
--listener-arn "$LISTENER_ARN" | \
jq -r --arg vhost "$VHOST" '.Rules[] | select(.Conditions[].HostHeaderConfig.Values[] == $VHOST) | .Priority')
if [ -n "${priority}" ]; then
echo -n "${priority}" > /priority
exit 0
fi
fi
# Grab a priority random from 1-50k and check if available, retry 10 times if none available
priority=0
for i in {1..10}
do
p=$(shuf -i 1-50000 -n 1)
# Find the next priority available that we can allocate
aws elbv2 describe-rules \
--listener-arn "$LISTENER_ARN" \
| jq -e "select(.Rules[].Priority == \"${p}\") | true" && continue
priority="${p}"
break
done
if [ "${priority}" -lt 1 ]; then
echo "Error: cannot determine a Rule priority"
exit 1
fi
echo -n "${priority}" > /priority
"""#,
]
env: {
LISTENER_ARN: listenerArn
VHOST: vhost
}
},
op.#Export & {
source: "/db_created"
format: "string"
},
]
}
}