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Merge pull request #153 from vshn/add/mariadb_metrics
Add/mariadb metrics
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package probes | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "database/sql" | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| "github.com/go-sql-driver/mysql" | ||
| ) | ||
|
|
||
| var _ Prober = MariaDB{} | ||
|
|
||
| // MariaDB is a prober to test the uptime of a MariaDB instance. | ||
| type MariaDB struct { | ||
| db *sql.DB | ||
|
|
||
| Service string | ||
| Name string | ||
| Namespace string | ||
| Organization string | ||
| HighAvailable bool | ||
| ServiceLevel string | ||
| } | ||
|
|
||
| // Close closes open connections to the MariaDB server. | ||
| func (p MariaDB) Close() error { | ||
| if p.db != nil { | ||
| p.db.Close() | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // GetInfo returns the prober infos | ||
| func (p MariaDB) GetInfo() ProbeInfo { | ||
| return ProbeInfo{ | ||
| Service: p.Service, | ||
| Name: p.Name, | ||
| Namespace: p.Namespace, | ||
| Organization: p.Organization, | ||
| HighAvailable: p.HighAvailable, | ||
| ServiceLevel: p.ServiceLevel, | ||
| } | ||
| } | ||
|
|
||
| // Probe sends a test query to the configured MariaDB server. | ||
| // Will return an error if the prober does not have a valid db connection. | ||
| func (p MariaDB) Probe(ctx context.Context) error { | ||
| if p.db == nil { | ||
| return errors.New("invalid credentials") | ||
| } | ||
| _, err := p.db.Exec("SELECT 1") | ||
| return err | ||
| } | ||
|
|
||
| // NewMariaDB connects to the provided dsn and returns a prober | ||
| func NewMariaDB(service, name, namespace, dsn, organization, caCRT, serviceLevel string, ha, TLSEnabled bool) (*MariaDB, error) { | ||
| // regardless of the TLS setting, ca.crt is present in connection secret, therefore, it's safe to keep self-signed cert in a pool | ||
| rootCAs := x509.NewCertPool() | ||
| // open connection to MariaDB | ||
| if ok := rootCAs.AppendCertsFromPEM([]byte(caCRT)); !ok { | ||
| return nil, fmt.Errorf("failed to append PEM") | ||
| } | ||
|
|
||
| mysql.RegisterTLSConfig(name, &tls.Config{ | ||
| RootCAs: rootCAs, | ||
| }) | ||
| if TLSEnabled { | ||
| // tls must be set to custom name, not into "custom" as it's not supported by the driver | ||
| // name is unique, so collision is impossible | ||
| dsn = dsn + "?tls=" + name | ||
| } | ||
| db, err := sql.Open("mysql", dsn) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &MariaDB{ | ||
| db: db, | ||
| Service: service, | ||
| Name: name, | ||
| Namespace: namespace, | ||
| Organization: organization, | ||
| HighAvailable: ha, | ||
| ServiceLevel: serviceLevel, | ||
| }, nil | ||
| } | ||
|
|
||
| // NewFailingMariaDB creates a prober that will fail. | ||
| // Can be used if the controller can't access valid credentials. | ||
| func NewFailingMariaDB(service, name, namespace string) (*MariaDB, error) { | ||
| return &MariaDB{ | ||
| Service: service, | ||
| Name: name, | ||
| Namespace: namespace, | ||
| }, nil | ||
| } |
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