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package clients
import (
"context"
"fmt"
"runtime"
"github.com/mimecast/dtail/internal/clients/handlers"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/omode"
gossh "golang.org/x/crypto/ssh"
)
// HealthClient is used to perform a basic server health check.
type HealthClient struct {
baseClient
}
// NewHealthClient returns a new health client.
func NewHealthClient(args config.Args) (*HealthClient, error) {
args.Mode = omode.HealthClient
args.UserName = config.HealthUser
args.SSHAuthMethods = append(args.SSHAuthMethods, gossh.Password(config.HealthUser))
c := HealthClient{
baseClient: baseClient{
Args: args,
throttleCh: make(chan struct{}, args.ConnectionsPerCPU*runtime.NumCPU()),
retry: false,
runtime: newClientRuntimeBoundary(config.CurrentRuntime()),
},
}
c.init()
c.makeConnections(c)
return &c, nil
}
func (c HealthClient) makeHandler(server string) handlers.Handler {
return handlers.NewHealthHandler(server)
}
func (c HealthClient) makeCommands() (commands []string) {
commands = append(commands, "health")
return
}
// Start the health client.
func (c *HealthClient) Start(ctx context.Context, statsCh <-chan string) int {
status := c.baseClient.Start(ctx, statsCh)
switch status {
case 0:
if c.Serverless {
fmt.Printf("WARNING: All seems fine but the check only run in serverless mode" +
", please specify a remote server via --server hostname:port\n")
return 1
}
fmt.Printf("OK: All fine at %s :-)\n", c.ServersStr)
case 2:
if c.Serverless {
fmt.Printf("CRITICAL: DTail server not operating properly (using " +
"serverless connction)!\n")
return 2
}
fmt.Printf("CRITICAL: DTail server not operating properly at %s!\n",
c.ServersStr)
default:
if c.Serverless {
fmt.Printf("UNKNOWN: Received unknown status code %d (using serverless "+
"connection)\n", status)
return status
}
fmt.Printf("UNKNOWN: Received unknown status code %d from %s!\n",
status, c.ServersStr)
}
return status
}
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