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encoding.go
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encoding.go
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/*
* Teleport
* Copyright (C) 2023 Gravitational, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package upgradewindow
import (
"fmt"
"strings"
"github.com/gravitational/trace"
"github.com/gravitational/teleport/api/types"
"github.com/gravitational/teleport/lib/utils"
)
// EncodeKubeControllerSchedule converts an agent upgrade schedule to the file format
// expected by the kuberenets upgrade controller.
func EncodeKubeControllerSchedule(schedule types.AgentUpgradeSchedule) (string, error) {
b, err := utils.FastMarshal(&schedule)
if err != nil {
return "", trace.Errorf("failed to encode kube controller schedule: %v", err)
}
return string(b), nil
}
// unitScheduleHeader is the first line in the systemd unit upgrader schedule. The teleport-upgrade
// script invoked by the unit ignores all lines starting with '# '.
const unitScheduleHeader = "# generated by teleport\n"
// EncodeSystemdUnitSchedule converts an agent upgrade schedule to the file format
// expected by the teleport-upgrade script.
func EncodeSystemdUnitSchedule(schedule types.AgentUpgradeSchedule) (string, error) {
if len(schedule.Windows) == 0 {
return "", trace.BadParameter("cannot encode empty schedule")
}
var builder strings.Builder
builder.WriteString(unitScheduleHeader)
for _, window := range schedule.Windows {
// upgrade windows are encoded as a pair of space-separated unix timestamps.
fmt.Fprintf(&builder, "%d %d\n", window.Start.Unix(), window.Stop.Unix())
}
return builder.String(), nil
}