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ipn/store/awsstore: persist state with intelligent tiering

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Fixes #6784

This PR makes it so that we can persist the tailscaled state with
intelligent tiering which increases the capacity from 4kb to 8kb

Signed-off-by: Marwan Sulaiman <marwan@tailscale.com>
This commit is contained in:
Marwan Sulaiman 2023-04-24 08:54:48 -04:00 committed by Marwan Sulaiman
parent 90ba26cea1
commit ce11c82d51
1 changed files with 13 additions and 2 deletions
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15
ipn/store/awsstore/store_aws.go
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@ -51,6 +51,12 @@ type awsStore struct {
// New returns a new ipn.StateStore using the AWS SSM storage // New returns a new ipn.StateStore using the AWS SSM storage
// location given by ssmARN. // location given by ssmARN.
//
// Note that we store the entire store in a single parameter
// key, therefore if the state is above 8kb, it can cause
// Tailscaled to only only store new state in-memory and
// restarting Tailscaled can fail until you delete your state
// from the AWS Parameter Store.
func New(_ logger.Logf, ssmARN string) (ipn.StateStore, error) { func New(_ logger.Logf, ssmARN string) (ipn.StateStore, error) {
return newStore(ssmARN, nil) return newStore(ssmARN, nil)
} }
@ -160,14 +166,19 @@ func (s *awsStore) persistState() error {
return err return err
} }
// Store in AWS SSM parameter store // Store in AWS SSM parameter store.
//
// We use intelligent tiering so that when the state is below 4kb, it uses Standard tiering
// which is free. However, if it exceeds 4kb it switches the parameter to advanced tiering
// doubling the capacity to 8kb per the following docs:
// https://aws.amazon.com/about-aws/whats-new/2019/08/aws-systems-manager-parameter-store-announces-intelligent-tiering-to-enable-automatic-parameter-tier-selection/
_, err = s.ssmClient.PutParameter( _, err = s.ssmClient.PutParameter(
context.TODO(), context.TODO(),
&ssm.PutParameterInput{ &ssm.PutParameterInput{
Name: aws.String(s.ParameterName()), Name: aws.String(s.ParameterName()),
Value: aws.String(string(bs)), Value: aws.String(string(bs)),
Overwrite: aws.Bool(true), Overwrite: aws.Bool(true),
Tier: ssmTypes.ParameterTierStandard, Tier: ssmTypes.ParameterTierIntelligentTiering,
Type: ssmTypes.ParameterTypeSecureString, Type: ssmTypes.ParameterTypeSecureString,
}, },
) )