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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2021 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package client
import (
"bytes"
"encoding/json"
"fmt"
"time"
"github.com/snapcore/snapd/gadget/quantity"
)
type postQuotaData struct {
Action string `json:"action"`
GroupName string `json:"group-name"`
Parent string `json:"parent,omitempty"`
Snaps []string `json:"snaps,omitempty"`
Services []string `json:"services,omitempty"`
Constraints *QuotaValues `json:"constraints,omitempty"`
}
type QuotaGroupResult struct {
GroupName string `json:"group-name"`
Parent string `json:"parent,omitempty"`
Subgroups []string `json:"subgroups,omitempty"`
Snaps []string `json:"snaps,omitempty"`
Services []string `json:"services,omitempty"`
Constraints *QuotaValues `json:"constraints,omitempty"`
Current *QuotaValues `json:"current,omitempty"`
}
type QuotaCPUValues struct {
Count int `json:"count,omitempty"`
Percentage int `json:"percentage,omitempty"`
}
type QuotaCPUSetValues struct {
CPUs []int `json:"cpus,omitempty"`
}
type QuotaJournalRate struct {
RateCount int `json:"rate-count"`
RatePeriod time.Duration `json:"rate-period"`
}
type QuotaJournalValues struct {
Size quantity.Size `json:"size,omitempty"`
*QuotaJournalRate
}
type QuotaValues struct {
Memory quantity.Size `json:"memory,omitempty"`
CPU *QuotaCPUValues `json:"cpu,omitempty"`
CPUSet *QuotaCPUSetValues `json:"cpu-set,omitempty"`
Threads int `json:"threads,omitempty"`
Journal *QuotaJournalValues `json:"journal,omitempty"`
}
type EnsureQuotaOptions struct {
// Parent is used to assign a Parent quota group
Parent string
// Snaps that should be added to the quota group
Snaps []string
// Services that should be added to the quota group
Services []string
// Constraints are the resource limits that should be applied to the quota group,
// these are added or modified, not removed.
Constraints *QuotaValues
}
// EnsureQuota creates a quota group or updates an existing group with the options
// provided.
func (client *Client) EnsureQuota(groupName string, opts *EnsureQuotaOptions) (changeID string, err error) {
if groupName == "" {
return "", fmt.Errorf("cannot create or update quota group without a name")
}
if opts == nil {
return "", fmt.Errorf("cannot create or update quota group without any options")
}
// TODO: use naming.ValidateQuotaGroup()
data := &postQuotaData{
Action: "ensure",
GroupName: groupName,
Parent: opts.Parent,
Snaps: opts.Snaps,
Services: opts.Services,
Constraints: opts.Constraints,
}
var body bytes.Buffer
if err := json.NewEncoder(&body).Encode(data); err != nil {
return "", err
}
chgID, err := client.doAsync("POST", "/v2/quotas", nil, nil, &body)
if err != nil {
return "", err
}
return chgID, nil
}
func (client *Client) GetQuotaGroup(groupName string) (*QuotaGroupResult, error) {
if groupName == "" {
return nil, fmt.Errorf("cannot get quota group without a name")
}
var res *QuotaGroupResult
path := fmt.Sprintf("/v2/quotas/%s", groupName)
if _, err := client.doSync("GET", path, nil, nil, nil, &res); err != nil {
return nil, err
}
return res, nil
}
func (client *Client) RemoveQuotaGroup(groupName string) (changeID string, err error) {
if groupName == "" {
return "", fmt.Errorf("cannot remove quota group without a name")
}
data := &postQuotaData{
Action: "remove",
GroupName: groupName,
}
var body bytes.Buffer
if err := json.NewEncoder(&body).Encode(data); err != nil {
return "", err
}
chgID, err := client.doAsync("POST", "/v2/quotas", nil, nil, &body)
if err != nil {
return "", fmt.Errorf("cannot remove quota group: %w", err)
}
return chgID, nil
}
func (client *Client) Quotas() ([]*QuotaGroupResult, error) {
var res []*QuotaGroupResult
if _, err := client.doSync("GET", "/v2/quotas", nil, nil, nil, &res); err != nil {
return nil, err
}
return res, nil
}
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