aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--ansible/group_vars/all/ipam.yml12
-rw-r--r--utils/go.mod5
-rw-r--r--utils/go.sum4
-rw-r--r--utils/main.go160
-rw-r--r--utils/yaml_ipam/yaml_ipam.go26
5 files changed, 201 insertions, 6 deletions
diff --git a/ansible/group_vars/all/ipam.yml b/ansible/group_vars/all/ipam.yml
index f3f75ac..aa9da27 100644
--- a/ansible/group_vars/all/ipam.yml
+++ b/ansible/group_vars/all/ipam.yml
@@ -15,25 +15,25 @@ ipam6:
node1_dn42:
range: "fdb1:4242:3538:2002::/64"
hosts:
- node1: "fdb1:4242:3538:2002::/64"
+ node1: "fdb1:4242:3538:2002::ffff"
node2_dn42:
range: "fdb1:4242:3538:2003::/64"
hosts:
- node2: "fdb1:4242:3538:2003::/64"
+ node2: "fdb1:4242:3538:2003::ffff"
knot_dn42:
range: "fdb1:4242:3538:2004::/64"
hosts:
- knot: "fdb1:4242:3538:2004::ffff/64"
+ knot: "fdb1:4242:3538:2004::ffff"
coregonus_dn42:
range: "fdb1:4242:3538:2005::/64"
hosts:
- coregonus-ix: "fdb1:4242:3538:2005::ffff/64"
+ coregonus-ix: "fdb1:4242:3538:2005::ffff"
coregonus_docker:
range: "fdb1:4242:3538:2005:df01:676a:ec28:0a00/120"
kv24_dn42:
range: "fdb1:4242:3538:2006::/64"
hosts:
- kv24ix: "fdb1:4242:3538:2006::ffff/64"
+ kv24ix: "fdb1:4242:3538:2006::ffff"
hash_dn42:
range: "fdb1:4242:3538:2007::/64"
hosts:
@@ -43,7 +43,7 @@ ipam6:
lhn2_dn42:
range: "fdb1:4242:3538:2008::/64"
hosts:
- lhn2pi: "fdb1:4242:3538:2008::ffff/64"
+ lhn2pi: "fdb1:4242:3538:2008::ffff"
conflatorio: "fdb1:4242:3538:2008:8042:32ff:fe0c:7161"
danneri: "fdb1:4242:3538:2008:9422:d355:95b7:f170"
diff --git a/utils/go.mod b/utils/go.mod
new file mode 100644
index 0000000..0090185
--- /dev/null
+++ b/utils/go.mod
@@ -0,0 +1,5 @@
+module utils
+
+go 1.23
+
+require gopkg.in/yaml.v3 v3.0.1
diff --git a/utils/go.sum b/utils/go.sum
new file mode 100644
index 0000000..a62c313
--- /dev/null
+++ b/utils/go.sum
@@ -0,0 +1,4 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/utils/main.go b/utils/main.go
new file mode 100644
index 0000000..db27e9c
--- /dev/null
+++ b/utils/main.go
@@ -0,0 +1,160 @@
+package main
+
+import (
+ "fmt"
+ "log"
+ "net/netip"
+ "os"
+ "utils/yaml_ipam"
+)
+
+func main() {
+ err := work()
+ if err != nil {
+ _, _ = fmt.Fprintf(os.Stderr, "Error reading file: %v\n", err)
+ os.Exit(1)
+ }
+}
+
+func work() error {
+ ipamYaml := "../ansible/group_vars/all/ipam.yml"
+ bs, err := os.ReadFile(ipamYaml)
+ if err != nil {
+ return err
+ }
+
+ ipam, err := loadIpam(bs)
+ if err != nil {
+ return err
+ }
+
+ fmt.Printf("digraph {\n")
+ //fmt.Printf(" layout=dot\n")
+ //fmt.Printf(" layout=twopi\n")
+ fmt.Printf(" layout=circo\n")
+ //fmt.Printf(" ranksep=3\n")
+ //fmt.Printf(" ratio=auto\n")
+ //fmt.Printf(" rankdir=LR\n")
+ //fmt.Printf(" rankdir=RL\n")
+ //fmt.Printf(" rankdir=TB\n")
+ fmt.Printf("\n")
+ fmt.Printf(" # Nodes\n")
+ for _, n := range ipam.networks {
+ fmt.Printf(" %s [ label = \"%s\\n%s\"];\n", n.name, n.name, n.prefix)
+ }
+ for _, n := range ipam.FindRoots() {
+ fmt.Printf(" %s [ root = true ];\n", n.name)
+ }
+
+ fmt.Printf("\n")
+ fmt.Printf(" # Relationships\n")
+ for _, n := range ipam.networks {
+ for _, c := range ipam.networks {
+ if c.parent == n {
+ fmt.Printf(" %s -> %s;\n", n.name, c.name)
+ }
+ }
+ }
+ fmt.Printf("}\n")
+
+ return nil
+}
+
+func loadIpam(bs []byte) (*Ipam, error) {
+ parsed, err := yaml_ipam.Parse(bs)
+ if err != nil {
+ return nil, err
+ }
+
+ ipam_, err := processNetworks(parsed.Ipam6.Networks)
+ if err != nil {
+ return nil, err
+ }
+
+ ipam_.ResolveParents()
+
+ return ipam_, nil
+}
+
+type Ipam struct {
+ networks []*Network
+}
+
+func (ipam *Ipam) ResolveParents() {
+ for _, n := range ipam.networks {
+ log.Printf("network %s/%s", n.name, n.prefix)
+ for _, p := range ipam.networks {
+ if n == p {
+ continue
+ }
+ //log.Printf("candidate %s/%s", p.name, p.prefix)
+ if p.prefix.Contains(n.prefix.Addr()) {
+ if n.parent == nil {
+ log.Printf("found parent %s/%s", p.name, p.prefix)
+ n.parent = p
+ } else {
+ if n.parent.prefix.Contains(p.prefix.Addr()) {
+ log.Printf("found better parent %s/%s", p.name, p.prefix)
+ n.parent = p
+ }
+ }
+ }
+ }
+ }
+
+ return
+}
+
+func (ipam *Ipam) FindRoots() []*Network {
+ var ns []*Network
+
+ for _, n := range ipam.networks {
+ if n.parent == nil {
+ ns = append(ns, n)
+ }
+ }
+
+ return ns
+}
+
+type Network struct {
+ name string
+ parent *Network
+ prefix netip.Prefix
+ hosts []networkHost
+}
+
+type networkHost struct {
+ name string
+ address netip.Addr
+}
+
+func processNetworks(networks map[string]yaml_ipam.Network6Yaml) (*Ipam, error) {
+ var ns []*Network
+
+ for name, net := range networks {
+ log.Printf("Processing net %v\net", name)
+ prefix, err := netip.ParsePrefix(net.Range)
+ if err != nil {
+ return nil, fmt.Errorf("error parsing net range: %v\net", err)
+ }
+ log.Printf("prefix: %s", prefix.String())
+
+ n := Network{name: name, prefix: prefix}
+ for hostname, a := range net.Hosts {
+ addr, err := netip.ParseAddr(a)
+ if err != nil {
+ return nil, fmt.Errorf("network: %s, unable to parse host address %s\net", n.name, a)
+ }
+
+ n.hosts = append(n.hosts, networkHost{
+ name: hostname,
+ address: addr,
+ })
+ }
+
+ ns = append(ns, &n)
+ }
+
+ return &Ipam{networks: ns}, nil
+}
diff --git a/utils/yaml_ipam/yaml_ipam.go b/utils/yaml_ipam/yaml_ipam.go
new file mode 100644
index 0000000..ff65155
--- /dev/null
+++ b/utils/yaml_ipam/yaml_ipam.go
@@ -0,0 +1,26 @@
+package yaml_ipam
+
+import "gopkg.in/yaml.v3"
+
+type Ipam struct {
+ Ipam6 Ipam6 `yaml:"ipam6"`
+}
+
+type Ipam6 struct {
+ Networks map[string]Network6Yaml `yaml:"networks"`
+}
+
+type Network6Yaml struct {
+ Range string `yaml:"range"`
+ Hosts map[string]string `yaml:"hosts"`
+}
+
+func Parse(bs []byte) (Ipam, error) {
+ var ipam Ipam
+ err := yaml.Unmarshal(bs, &ipam)
+ if err != nil {
+ return Ipam{}, err
+ }
+
+ return ipam, nil
+}
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-22 16:22:50 +0000