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openstack.go
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openstack.go
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/**
* Copyright 2021 SAP SE
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package node
import (
"bytes"
"encoding/json"
"fmt"
"net"
"regexp"
"strconv"
"text/template"
"time"
"github.com/gophercloud/gophercloud"
"github.com/gophercloud/gophercloud/openstack"
"github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/aggregates"
"github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/services"
"github.com/gophercloud/gophercloud/openstack/compute/v2/flavors"
"github.com/gophercloud/gophercloud/openstack/compute/v2/images"
"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
"github.com/gophercloud/gophercloud/openstack/dns/v2/recordsets"
"github.com/gophercloud/gophercloud/openstack/dns/v2/zones"
"github.com/gophercloud/gophercloud/openstack/networking/v2/networks"
"github.com/gophercloud/gophercloud/pagination"
"github.com/sapcc/baremetal_temper/pkg/clients"
"github.com/sapcc/baremetal_temper/pkg/config"
)
//CreateDNSRecords For creates a dns record for the given node if not exists
func (n *Node) createDNSRecords() (err error) {
c, err := n.oc.GetServiceClient("dns")
if err != nil {
return
}
n.log.Debug("creating dns record")
opts := zones.ListOpts{
Name: n.cfg.Domain + ".",
}
allPages, err := zones.List(c, opts).AllPages()
if err != nil {
return
}
allZones, err := zones.ExtractZones(allPages)
if err != nil || len(allZones) == 0 {
return fmt.Errorf("wrong dns zone")
}
for _, a := range n.IpamAddresses {
var ip net.IP
ip, _, err = net.ParseCIDR(*a.Address)
if err != nil {
return
}
n.log.Debug("Create A recordset: ", ip.String(), allZones[0].ID, a.DNSName)
if err = n.createDNSRecord(ip.String(), allZones[0].ID, a.DNSName+".", "A"); err != nil {
return
}
}
for _, a := range n.IpamAddresses {
var arpa string
var ip net.IP
ip, _, err = net.ParseCIDR(*a.Address)
if err != nil {
return
}
arpa, err = reverseaddr(ip.String())
if err != nil {
return err
}
zoneID, err := n.createArpaZone(ip.String())
if err != nil {
return err
}
n.log.Debug("Create PTR recordset: ", a.DNSName, zoneID, arpa)
if err = n.createDNSRecord(a.DNSName+".", zoneID, arpa, "PTR"); err != nil {
return err
}
}
return
}
func (n *Node) getRules() (r config.Rule, err error) {
var funcMap = template.FuncMap{
"imageToID": n.getImageID,
"getMatchingFlavorForNode": n.getMatchingFlavorFor,
"getRootDeviceSize": n.getRootDeviceSize,
"getPortGroupUUID": n.createPortGroup,
}
tmpl := template.New("rules.json").Funcs(funcMap)
t, err := tmpl.ParseFiles(n.cfg.RulesPath)
if err != nil {
return r, fmt.Errorf("Error parsing rules: %s", err.Error())
}
data, err := n.Redfish.GetData()
out := new(bytes.Buffer)
d := map[string]interface{}{
"node": n.Name,
"inventory": data.Inventory,
}
err = t.Execute(out, d)
if err != nil {
return
}
json.Unmarshal(out.Bytes(), &r)
return
}
func (n *Node) getRootDeviceSize() (size int64, err error) {
data, err := n.Redfish.GetData()
if err != nil {
return
}
size = data.RootDisk.Size / 1024 / 1024 / 1024
l := len(strconv.FormatInt(size, 10))
switch l {
case 3:
size = 100 * ((size + 90) / 100)
case 4:
size = 1000 * ((size + 900) / 1000)
}
if size == 0 {
return size, fmt.Errorf("could not get root disk size")
}
return
}
func (n *Node) getMatchingFlavorFor() (name string, err error) {
c, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
data, err := n.Redfish.GetData()
if err != nil {
return
}
mem := 0.1
//disk := 0.2
cpu := 0.1
var fl flavors.Flavor
flavorNameRules := regexp.MustCompile(`^zh.+|^hv_.+`)
err = flavors.ListDetail(c, flavors.ListOpts{AccessType: flavors.PublicAccess}).EachPage(func(p pagination.Page) (bool, error) {
fs, err := flavors.ExtractFlavors(p)
if err != nil {
return false, err
}
for _, f := range fs {
if !flavorNameRules.MatchString(f.Name) {
continue
}
deltaMem := calcDelta(f.RAM, data.Inventory.Memory.PhysicalMb)
//deltaDisk := calcDelta(f.Disk, int(data.RootDisk.Size/1024/1024/1024))
deltaCPU := calcDelta(f.VCPUs, data.Inventory.CPU.Count)
if deltaMem <= mem && deltaCPU <= cpu {
mem = deltaMem
//disk = deltaDisk
cpu = deltaCPU
name = f.Name
fl = f
}
}
return true, nil
})
if name == "" {
return name, fmt.Errorf("no matching flavor found for node")
}
data.Inventory.Memory.PhysicalMb = fl.RAM
//data.RootDisk.Size = int64(fl.Disk)
data.Inventory.CPU.Count = fl.VCPUs
return
}
func (n *Node) enableComputeService(host string) (id string, err error) {
cl, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
cl.Microversion = "2.53"
ps := services.List(cl, services.ListOpts{Host: host})
p, err := ps.AllPages()
if err != nil {
return
}
var svc services.Service
svcs, err := services.ExtractServices(p)
if err != nil {
return
}
for _, s := range svcs {
if s.Host == host {
svc = s
break
}
}
if svc.Status == "" {
n.log.Warnf("compute service %s does not exist yet", host)
return
}
if svc.Status == string(services.ServiceDisabled) {
r := services.Update(cl, svc.ID, services.UpdateOpts{Status: services.ServiceEnabled})
return svc.ID, r.Err
}
return
}
func (n *Node) addHostToAggregate(host, az string) (err error) {
cl, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
p := aggregates.List(cl)
ps, err := p.AllPages()
if err != nil {
return
}
aggs, err := aggregates.ExtractAggregates(ps)
if err != nil {
return
}
var aggregate aggregates.Aggregate
for _, a := range aggs {
if a.AvailabilityZone == az && a.Name == az {
aggregate = a
break
}
}
if aggregate.Name == "" {
return fmt.Errorf("cannot find aggregate for az: %s", az)
}
foundHost := false
for _, h := range aggregate.Hosts {
if h == host {
foundHost = true
break
}
}
if !foundHost {
r := aggregates.AddHost(cl, aggregate.ID, aggregates.AddHostOpts{Host: host})
return r.Err
}
return
}
func (n *Node) createArpaZone(ip string) (zoneID string, err error) {
c, err := n.oc.GetServiceClient("dns")
if err != nil {
return
}
arpaZone, err := reverseZone(ip)
if err != nil {
return
}
allPages, err := zones.List(c, zones.ListOpts{
Name: arpaZone,
}).AllPages()
if err != nil {
return
}
allZones, err := zones.ExtractZones(allPages)
if err != nil {
return
}
if len(allZones) == 0 {
z, err := zones.Create(c, zones.CreateOpts{
Name: arpaZone,
TTL: 3600,
Description: "An in-addr.arpa. zone for reverse lookups set up by baremetal temper",
Email: "stefan.hipfel@sap.com",
}).Extract()
if err != nil {
return zoneID, err
}
zoneID = z.ID
} else {
zoneID = allZones[0].ID
}
return
}
func (n *Node) createDNSRecord(ip, zoneID, recordName, rType string) (err error) {
c, err := n.oc.GetServiceClient("dns")
if err != nil {
return
}
_, err = recordsets.Create(c, zoneID, recordsets.CreateOpts{
Name: recordName,
TTL: 3600,
Type: rType,
Records: []string{ip},
}).Extract()
if httpStatus, ok := err.(gophercloud.ErrDefault409); ok {
if httpStatus.Actual == 409 {
// record already exists
return nil
}
}
return
}
func (n *Node) getImageID(name string) (id string, err error) {
cl, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
err = images.ListDetail(cl, images.ListOpts{Name: name, Status: "active"}).EachPage(
func(p pagination.Page) (bool, error) {
is, err := images.ExtractImages(p)
if err != nil {
return false, err
}
var latest time.Time
for _, i := range is {
//2021-06-28T14:04:58
if i.Name == name {
ts, err := time.Parse(time.RFC3339, i.Created)
if err != nil {
continue
}
if ts.After(latest) {
id = i.ID
latest = ts
}
continue
}
}
return true, nil
},
)
return
}
func (n *Node) getFlavorID(name string) (id string, err error) {
cl, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
err = flavors.ListDetail(cl, nil).EachPage(func(p pagination.Page) (bool, error) {
fs, err := flavors.ExtractFlavors(p)
if err != nil {
return true, err
}
for _, f := range fs {
if f.Name == name {
id = f.ID
return true, nil
}
}
return false, nil
})
return
}
func (n *Node) getConductorZone(name string) (id string, err error) {
cl, err := n.oc.GetServiceClient("compute")
if err != nil {
return
}
err = services.List(cl, services.ListOpts{Host: name}).EachPage(
func(p pagination.Page) (bool, error) {
svs, err := services.ExtractServices(p)
if err != nil {
return true, err
}
for _, sv := range svs {
if sv.Host == name {
id = sv.Zone
return true, nil
}
}
return false, nil
})
return
}
func (n *Node) getNetwork(name string) (net servers.Network, err error) {
pr, err := clients.NewProviderClient(n.cfg.Deployment.Openstack)
if err != nil {
return
}
nc, err := openstack.NewNetworkV2(pr, gophercloud.EndpointOpts{
Region: n.cfg.Region,
})
p, err := networks.List(nc, networks.ListOpts{Name: name}).AllPages()
if err != nil {
return
}
ns, err := networks.ExtractNetworks(p)
if err != nil || len(ns) != 1 {
return
}
net.UUID = ns[0].ID
return
}