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Add pool balancing strategy

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This change adds the ability to specify the pool balancing strategy to
use when processing queued jobs. Before this change, GARM would round-robin
through all pools that matched the set of tags requested by queued jobs.

When round-robin (default) is used for an entity (repo, org or enterprise)
and you have 2 pools defined for that entity with a common set of tags that
match 10 jobs (for example), then those jobs would trigger the creation of
a new runner in each of the two pools in turn. Job 1 would go to pool 1,
job 2 would go to pool 2, job 3 to pool 1, job 4 to pool 2 and so on.

When "stack" is used, those same 10 jobs would trigger the creation of a
new runner in the pool with the highest priority, every time.

In both cases, if a pool is full, the next one would be tried automatically.

For the stack case, this would mean that if pool 2 had a priority of 10 and
pool 1 would have a priority of 5, pool 2 would be saturated first, then
pool 1.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>
This commit is contained in:
Gabriel Adrian Samfira 2024-03-14 20:04:34 +00:00
parent 569d512819
commit ce3c917ae5
34 changed files with 362 additions and 137 deletions
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36
database/sql/models.go
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@ -83,37 +83,41 @@ type Pool struct {
Enterprise Enterprise `gorm:"foreignKey:EnterpriseID"`
Instances []Instance `gorm:"foreignKey:PoolID"`
Priority uint `gorm:"index:idx_pool_priority"`
}
type Repository struct {
Base
CredentialsName string
Owner string `gorm:"index:idx_owner_nocase,unique,collate:nocase"`
Name string `gorm:"index:idx_owner_nocase,unique,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:RepoID"`
Jobs []WorkflowJob `gorm:"foreignKey:RepoID;constraint:OnDelete:SET NULL"`
CredentialsName string
Owner string `gorm:"index:idx_owner_nocase,unique,collate:nocase"`
Name string `gorm:"index:idx_owner_nocase,unique,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:RepoID"`
Jobs []WorkflowJob `gorm:"foreignKey:RepoID;constraint:OnDelete:SET NULL"`
PoolBalancerType params.PoolBalancerType `gorm:"type:varchar(64)"`
}
type Organization struct {
Base
CredentialsName string
Name string `gorm:"index:idx_org_name_nocase,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:OrgID"`
Jobs []WorkflowJob `gorm:"foreignKey:OrgID;constraint:OnDelete:SET NULL"`
CredentialsName string
Name string `gorm:"index:idx_org_name_nocase,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:OrgID"`
Jobs []WorkflowJob `gorm:"foreignKey:OrgID;constraint:OnDelete:SET NULL"`
PoolBalancerType params.PoolBalancerType `gorm:"type:varchar(64)"`
}
type Enterprise struct {
Base
CredentialsName string
Name string `gorm:"index:idx_ent_name_nocase,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:EnterpriseID"`
Jobs []WorkflowJob `gorm:"foreignKey:EnterpriseID;constraint:OnDelete:SET NULL"`
CredentialsName string
Name string `gorm:"index:idx_ent_name_nocase,collate:nocase"`
WebhookSecret []byte
Pools []Pool `gorm:"foreignKey:EnterpriseID"`
Jobs []WorkflowJob `gorm:"foreignKey:EnterpriseID;constraint:OnDelete:SET NULL"`
PoolBalancerType params.PoolBalancerType `gorm:"type:varchar(64)"`
}
type Address struct {