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Signed-off-by: SK Ali Arman <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| package clickhouse_db_client | ||
|
|
||
| import ( | ||
| "database/sql" | ||
| ) | ||
|
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||
| type Client struct { | ||
| *sql.DB | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| package clickhouse_db_client | ||
|
|
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| import ( | ||
| "context" | ||
| "database/sql" | ||
| "fmt" | ||
| _ "github.com/ClickHouse/clickhouse-go/v2" | ||
| core "k8s.io/api/core/v1" | ||
| "k8s.io/klog/v2" | ||
| api "kubedb.dev/apimachinery/apis/kubedb/v1alpha2" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
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| type KubeDBClientBuilder struct { | ||
| kc client.Client | ||
| db *api.ClickHouse | ||
| url string | ||
| podName string | ||
| port *int | ||
| ctx context.Context | ||
| } | ||
|
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| func NewKubeDBClientBuilder(kc client.Client, db *api.ClickHouse) *KubeDBClientBuilder { | ||
| return &KubeDBClientBuilder{ | ||
| kc: kc, | ||
| db: db, | ||
| } | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithURL(url string) *KubeDBClientBuilder { | ||
| o.url = url | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithPod(podName string) *KubeDBClientBuilder { | ||
| o.podName = podName | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithPort(port *int) *KubeDBClientBuilder { | ||
| o.port = port | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) WithContext(ctx context.Context) *KubeDBClientBuilder { | ||
| o.ctx = ctx | ||
| return o | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) GetClickHouseClient() (*Client, error) { | ||
| if o.ctx == nil { | ||
| o.ctx = context.Background() | ||
| } | ||
|
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| connector, err := o.getConnectionString() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // connect to database | ||
| db, err := sql.Open("clickhouse", connector) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // ping to database to check the connection | ||
| if err := db.PingContext(o.ctx); err != nil { | ||
| closeErr := db.Close() | ||
| if closeErr != nil { | ||
| klog.Errorf("Failed to close client. error: %v", closeErr) | ||
| } | ||
| return nil, err | ||
| } | ||
|
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| return &Client{db}, nil | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) getURL() string { | ||
| return fmt.Sprintf("%s.%s.%s.svc", o.podName, o.db.GoverningServiceName(), o.db.Namespace) | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) getPort() *int { | ||
| chPort := 9000 | ||
| return &chPort | ||
| } | ||
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| func (o *KubeDBClientBuilder) getMySQLRootCredentials() (string, string, error) { | ||
| db := o.db | ||
| var secretName string | ||
| if db.Spec.AuthSecret != nil { | ||
| secretName = db.GetAuthSecretName() | ||
| } | ||
| var secret core.Secret | ||
| err := o.kc.Get(o.ctx, client.ObjectKey{Namespace: db.Namespace, Name: secretName}, &secret) | ||
| if err != nil { | ||
| return "", "", err | ||
| } | ||
| user, ok := secret.Data[core.BasicAuthUsernameKey] | ||
| if !ok { | ||
| return "", "", fmt.Errorf("DB root user is not set") | ||
| } | ||
| pass, ok := secret.Data[core.BasicAuthPasswordKey] | ||
| if !ok { | ||
| return "", "", fmt.Errorf("DB root password is not set") | ||
| } | ||
| return string(user), string(pass), nil | ||
| } | ||
|
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| func (o *KubeDBClientBuilder) getConnectionString() (string, error) { | ||
| user, pass, err := o.getMySQLRootCredentials() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| if o.podName != "" { | ||
| o.url = o.getURL() | ||
| } | ||
|
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| if o.port == nil { | ||
| o.port = o.getPort() | ||
| } | ||
| connector := fmt.Sprintf("clickhouse://%s:%d?username=%s&password=%s", o.url, *o.port, user, pass) | ||
|
|
||
| return connector, nil | ||
| } |
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