/
logs.go
86 lines (77 loc) · 2.54 KB
/
logs.go
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package deployment
import (
"github.com/gorilla/websocket"
"github.com/krane/krane/internal/docker"
"github.com/krane/krane/internal/logger"
)
// SubscribeToDeploymentLogs streams deployment logs to a websocket client
func SubscribeToDeploymentLogs(client *websocket.Conn, deployment string) {
data := make(chan []byte)
done := make(chan bool)
containers, err := GetContainersByDeployment(deployment)
if err != nil {
logger.Warnf("unable to get containers for deployment %s, %v", deployment, err)
if err := client.Close(); err != nil {
logger.Warnf("error closing client connection, %v", err)
return
}
return
}
for _, container := range containers {
if err := docker.GetClient().StreamContainerLogs(container.ID, data, done); err != nil {
logger.Warnf("error grabbing container reader, %v", err)
if err := client.Close(); err != nil {
logger.Warnf("error closing client connection, %v", err)
return
}
return
}
}
for {
select {
case bytes := <-data:
if err := client.WriteMessage(websocket.TextMessage, bytes); err != nil {
// this will log when a client has disconnected at which point the
// connection is not valid causing a write error. This should not
// affect other clients or streaming logs in general.
logger.Debugf("client %v disconnected", client.LocalAddr())
return
}
case <-done:
if err := client.Close(); err != nil {
logger.Warnf("error closing client connection when unsubscribing from container logs, %v", err)
return
}
}
}
}
// SubscribeToContainerLogs streams container logs to a websocket client
func SubscribeToContainerLogs(client *websocket.Conn, containerID string) {
data := make(chan []byte)
done := make(chan bool)
if err := docker.GetClient().StreamContainerLogs(containerID, data, done); err != nil {
logger.Warnf("error grabbing container reader, %v", err)
if err := client.Close(); err != nil {
logger.Warnf("error closing client connection, %v", err)
return
}
return
}
for {
select {
case bytes := <-data:
if err := client.WriteMessage(websocket.TextMessage, bytes); err != nil {
// this will log when a client has disconnected at which point the
// connection is not valid causing a write error. This should not
// affect other clients or streaming logs in general.
logger.Debugf("client %v disconnected", client.LocalAddr())
return
}
case <-done:
if err := client.Close(); err != nil {
logger.Warnf("error closing client connection when unsubscribing from container logs, %v", err)
return
}
}
}
}