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b6973a89 TL |
1 | package PVE::Corosync; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use Digest::SHA; | |
496de919 | 7 | use Clone 'clone'; |
b01bc84d | 8 | use Net::IP qw(ip_is_ipv6); |
b6973a89 TL |
9 | |
10 | use PVE::Cluster; | |
11 | ||
12 | my $basedir = "/etc/pve"; | |
13 | ||
496de919 TL |
14 | my $conf_array_sections = { |
15 | node => 1, | |
16 | interface => 1, | |
17 | }; | |
18 | ||
b6973a89 TL |
19 | # a very simply parser ... |
20 | sub parse_conf { | |
21 | my ($filename, $raw) = @_; | |
22 | ||
23 | return {} if !$raw; | |
24 | ||
25 | my $digest = Digest::SHA::sha1_hex(defined($raw) ? $raw : ''); | |
26 | ||
27 | $raw =~ s/#.*$//mg; | |
28 | $raw =~ s/\r?\n/ /g; | |
29 | $raw =~ s/\s+/ /g; | |
30 | $raw =~ s/^\s+//; | |
31 | $raw =~ s/\s*$//; | |
32 | ||
33 | my @tokens = split(/\s/, $raw); | |
34 | ||
496de919 | 35 | my $conf = { 'main' => {} }; |
b6973a89 TL |
36 | |
37 | my $stack = []; | |
496de919 | 38 | my $section = $conf->{main}; |
b6973a89 TL |
39 | |
40 | while (defined(my $token = shift @tokens)) { | |
41 | my $nexttok = $tokens[0]; | |
42 | ||
43 | if ($nexttok && ($nexttok eq '{')) { | |
44 | shift @tokens; # skip '{' | |
496de919 TL |
45 | my $new_section = {}; |
46 | if ($conf_array_sections->{$token}) { | |
47 | $section->{$token} = [] if !defined($section->{$token}); | |
48 | push @{$section->{$token}}, $new_section; | |
49 | } elsif (!defined($section->{$token})) { | |
50 | $section->{$token} = $new_section; | |
51 | } else { | |
52 | die "section '$token' already exists and not marked as array!\n"; | |
53 | } | |
b6973a89 TL |
54 | push @$stack, $section; |
55 | $section = $new_section; | |
56 | next; | |
57 | } | |
58 | ||
59 | if ($token eq '}') { | |
60 | $section = pop @$stack; | |
61 | die "parse error - uncexpected '}'\n" if !$section; | |
62 | next; | |
63 | } | |
64 | ||
65 | my $key = $token; | |
66 | die "missing ':' after key '$key'\n" if ! ($key =~ s/:$//); | |
67 | ||
68 | die "parse error - no value for '$key'\n" if !defined($nexttok); | |
69 | my $value = shift @tokens; | |
70 | ||
496de919 | 71 | $section->{$key} = $value; |
b6973a89 TL |
72 | } |
73 | ||
e7ecad20 TL |
74 | # make working with the config way easier |
75 | my ($totem, $nodelist) = $conf->{main}->@{"totem", "nodelist"}; | |
034a1b11 TL |
76 | |
77 | $nodelist->{node} = { | |
78 | map { | |
79 | $_->{name} // $_->{ring0_addr} => $_ | |
80 | } @{$nodelist->{node}} | |
81 | }; | |
82 | $totem->{interface} = { | |
83 | map { | |
84 | $_->{linknumber} // $_->{ringnumber} => $_ | |
85 | } @{$totem->{interface}} | |
86 | }; | |
e7ecad20 | 87 | |
b6973a89 TL |
88 | $conf->{digest} = $digest; |
89 | ||
90 | return $conf; | |
91 | } | |
92 | ||
93 | my $dump_section; | |
94 | $dump_section = sub { | |
95 | my ($section, $prefix) = @_; | |
96 | ||
496de919 | 97 | my $raw = ''; |
b6973a89 | 98 | |
496de919 TL |
99 | foreach my $k (sort keys %$section) { |
100 | my $v = $section->{$k}; | |
101 | if (ref($v) eq 'HASH') { | |
102 | $raw .= $prefix . "$k {\n"; | |
103 | $raw .= &$dump_section($v, "$prefix "); | |
104 | $raw .= $prefix . "}\n"; | |
105 | $raw .= "\n" if !$prefix; # add extra newline at 1st level only | |
106 | } elsif (ref($v) eq 'ARRAY') { | |
107 | foreach my $child (@$v) { | |
108 | $raw .= $prefix . "$k {\n"; | |
109 | $raw .= &$dump_section($child, "$prefix "); | |
110 | $raw .= $prefix . "}\n"; | |
111 | } | |
112 | } elsif (!ref($v)) { | |
1b8c5ae7 | 113 | die "got undefined value for key '$k'!\n" if !defined($v); |
496de919 TL |
114 | $raw .= $prefix . "$k: $v\n"; |
115 | } else { | |
116 | die "unexpected reference in config hash: $k => ". ref($v) ."\n"; | |
117 | } | |
b6973a89 TL |
118 | } |
119 | ||
b6973a89 | 120 | return $raw; |
b6973a89 TL |
121 | }; |
122 | ||
123 | sub write_conf { | |
124 | my ($filename, $conf) = @_; | |
125 | ||
e7ecad20 TL |
126 | my $c = clone($conf->{main}) // die "no main section"; |
127 | ||
128 | # retransform back for easier dumping | |
129 | my $hash_to_array = sub { | |
130 | my ($hash) = @_; | |
131 | return [ $hash->@{sort keys %$hash} ]; | |
132 | }; | |
b6973a89 | 133 | |
e7ecad20 TL |
134 | $c->{nodelist}->{node} = &$hash_to_array($c->{nodelist}->{node}); |
135 | $c->{totem}->{interface} = &$hash_to_array($c->{totem}->{interface}); | |
136 | ||
137 | my $raw = &$dump_section($c, ''); | |
b6973a89 TL |
138 | |
139 | return $raw; | |
140 | } | |
141 | ||
2b28b160 | 142 | # read only - use atomic_write_conf method to write |
b6973a89 TL |
143 | PVE::Cluster::cfs_register_file('corosync.conf', \&parse_conf); |
144 | # this is read/write | |
145 | PVE::Cluster::cfs_register_file('corosync.conf.new', \&parse_conf, | |
146 | \&write_conf); | |
147 | ||
148 | sub check_conf_exists { | |
149 | my ($silent) = @_; | |
150 | ||
151 | $silent = $silent // 0; | |
152 | ||
153 | my $exists = -f "$basedir/corosync.conf"; | |
154 | ||
155 | warn "Corosync config '$basedir/corosync.conf' does not exist - is this node part of a cluster?\n" | |
156 | if !$silent && !$exists; | |
157 | ||
158 | return $exists; | |
159 | } | |
160 | ||
161 | sub update_nodelist { | |
162 | my ($conf, $nodelist) = @_; | |
163 | ||
e7ecad20 | 164 | $conf->{main}->{nodelist}->{node} = $nodelist; |
b6973a89 | 165 | |
2b28b160 | 166 | atomic_write_conf($conf); |
b6973a89 TL |
167 | } |
168 | ||
169 | sub nodelist { | |
170 | my ($conf) = @_; | |
e7ecad20 | 171 | return clone($conf->{main}->{nodelist}->{node}); |
b6973a89 TL |
172 | } |
173 | ||
b6973a89 TL |
174 | sub totem_config { |
175 | my ($conf) = @_; | |
e7ecad20 | 176 | return clone($conf->{main}->{totem}); |
b6973a89 TL |
177 | } |
178 | ||
2b28b160 TL |
179 | # caller must hold corosync.conf cfs lock if used in read-modify-write cycle |
180 | sub atomic_write_conf { | |
181 | my ($conf, $no_increase_version) = @_; | |
182 | ||
183 | if (!$no_increase_version) { | |
184 | die "invalid corosync config: unable to read config version\n" | |
185 | if !defined($conf->{main}->{totem}->{config_version}); | |
186 | $conf->{main}->{totem}->{config_version}++; | |
187 | } | |
188 | ||
189 | PVE::Cluster::cfs_write_file("corosync.conf.new", $conf); | |
190 | ||
191 | rename("/etc/pve/corosync.conf.new", "/etc/pve/corosync.conf") | |
192 | || die "activating corosync.conf.new failed - $!\n"; | |
193 | } | |
194 | ||
b01bc84d TL |
195 | # for creating a new cluster with the current node |
196 | # params are those from the API/CLI cluster create call | |
197 | sub create_conf { | |
198 | my ($nodename, %param) = @_; | |
199 | ||
200 | my $clustername = $param{clustername}; | |
201 | my $nodeid = $param{nodeid} || 1; | |
202 | my $votes = $param{votes} || 1; | |
203 | ||
204 | my $local_ip_address = PVE::Cluster::remote_node_ip($nodename); | |
205 | my $ring0_addr = $param{ring0_addr} // $local_ip_address; | |
916c10b3 | 206 | my $bindnet0_addr = $param{bindnet0_addr} // $ring0_addr; |
b01bc84d TL |
207 | |
208 | my $use_ipv6 = ip_is_ipv6($ring0_addr); | |
209 | die "ring 0 addresses must be from same IP family!\n" | |
210 | if $use_ipv6 != ip_is_ipv6($bindnet0_addr); | |
211 | ||
212 | my $conf = { | |
213 | totem => { | |
214 | version => 2, # protocol version | |
215 | secauth => 'on', | |
216 | cluster_name => $clustername, | |
217 | config_version => 0, | |
218 | ip_version => $use_ipv6 ? 'ipv6' : 'ipv4', | |
219 | interface => { | |
220 | 0 => { | |
221 | bindnetaddr => $bindnet0_addr, | |
222 | ringnumber => 0, | |
223 | }, | |
224 | }, | |
225 | }, | |
226 | nodelist => { | |
227 | node => { | |
228 | $nodename => { | |
229 | name => $nodename, | |
230 | nodeid => $nodeid, | |
231 | quorum_votes => $votes, | |
232 | ring0_addr => $ring0_addr, | |
233 | }, | |
234 | }, | |
235 | }, | |
236 | quorum => { | |
237 | provider => 'corosync_votequorum', | |
238 | }, | |
239 | logging => { | |
240 | to_syslog => 'yes', | |
241 | debug => 'off', | |
242 | }, | |
243 | }; | |
244 | ||
245 | die "Param bindnet1_addr set but ring1_addr not specified!\n" | |
246 | if (defined($param{bindnet1_addr}) && !defined($param{ring1_addr})); | |
247 | ||
248 | my $ring1_addr = $param{ring1_addr}; | |
249 | my $bindnet1_addr = $param{bindnet1_addr} // $param{ring1_addr}; | |
250 | ||
251 | if ($bindnet1_addr) { | |
252 | die "ring 1 addresses must be from same IP family as ring 0!\n" | |
253 | if $use_ipv6 != ip_is_ipv6($bindnet1_addr) || | |
254 | $use_ipv6 != ip_is_ipv6($ring1_addr); | |
255 | ||
256 | $conf->{totem}->{interface}->{1} = { | |
257 | bindnetaddr => $bindnet1_addr, | |
258 | ringnumber => 1, | |
259 | }; | |
260 | $conf->{totem}->{rrp_mode} = 'passive'; | |
261 | $conf->{nodelist}->{node}->{$nodename}->{ring1_addr} = $ring1_addr; | |
262 | } | |
263 | ||
264 | return { main => $conf }; | |
265 | } | |
266 | ||
b6973a89 | 267 | 1; |