Update Procédures/supervision.md
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# Installation de la supervision sur une machine virtuelle
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## Générer un ticket sur isengard.libre-en-communs.org
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sudo icinga2 pki ticket --cn NOM_DE_DOMAINE_DE_VM
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On obtient un ticket à noter dans l'issue. Il sera redemandé plus tard.
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## En SSH sur la machine virtuelle, installer l'agent de supervision
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sudo apt install icinga2 monitoring-plugins monitoring-plugins-contrib
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## Modifier la configuration de la sonde de mémoire vive (pour corriger un bug)
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<details>
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<summary>/usr/share/icinga2/include/plugins-contrib.d/operating-system.conf</summary>
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object CheckCommand "mem" {
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command = [ PluginContribDir + "/check_memory" ]
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arguments = {
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"-u" = {
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set_if = "$mem_used$"
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description = "Check USED memory"
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}
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"-f" = {
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set_if = "$mem_free$"
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description = "Check FREE memory"
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}
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"-C" = {
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set_if = "$mem_cache$"
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description = "Count OS caches as FREE memory"
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}
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"-w" = {
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value = "$mem_warning$"
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description = "Percent free/used when to warn"
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}
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"-c" = {
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value = "$mem_critical$"
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description = "Percent free/used when critical"
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}
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}
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vars.mem_used = false
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vars.mem_free = false
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vars.mem_cache = false
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}
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</details>
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## Connecter notre agent au serveur de supervision
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sudo icinga2 node wizard
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<details>
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<summary>On réalise la configuration interactive suivante:</summary>
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Welcome to the Icinga 2 Setup Wizard!
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We will guide you through all required configuration details.
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Please specify if this is an agent/satellite setup ('n' installs a master setup) [Y/n]:
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Starting the Agent/Satellite setup routine...
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Please specify the common name (CN) [NOM_DE_DOMAINE_DE_VM]:
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Please specify the parent endpoint(s) (master or satellite) where this node should connect to:
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Master/Satellite Common Name (CN from your master/satellite node): isengard.libre-en-communs.org
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Do you want to establish a connection to the parent node from this node? [Y/n]:
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Please specify the master/satellite connection information:
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Master/Satellite endpoint host (IP address or FQDN): isengard.libre-en-communs.org
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Master/Satellite endpoint port [5665]:
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Add more master/satellite endpoints? [y/N]:
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Parent certificate information:
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Version: 3
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Subject: CN = isengard.libre-en-communs.org
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Issuer: CN = Icinga CA
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Valid From: Dec 9 14:36:07 2021 GMT
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Valid Until: Dec 5 14:36:07 2036 GMT
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Serial: c4:3f:53:b2:cf:09:f7:b5:2e:88:39:03:e9:96:c8:fc:99:a1:ca:3a
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Signature Algorithm: sha256WithRSAEncryption
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Subject Alt Names: isengard.libre-en-communs.org
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Fingerprint: 54 78 22 83 24 22 3A A7 FD 00 01 E4 10 67 71 B6 CA 3E A2 71 93 63 F8 64 29 E9 45 1F D1 35 A9 95
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Is this information correct? [y/N]: y
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Please specify the request ticket generated on your Icinga 2 master (optional).
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(Hint: # icinga2 pki ticket --cn 'NOM_DE_DOMAINE_DE_VM'): INSERER_NUMERO_DE_TICKET_ICI
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Please specify the API bind host/port (optional):
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Bind Host []:
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Bind Port []:
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Accept config from parent node? [y/N]: y
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Accept commands from parent node? [y/N]: y
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Reconfiguring Icinga...
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Disabling feature notification. Make sure to restart Icinga 2 for these changes to take effect.
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Enabling feature api. Make sure to restart Icinga 2 for these changes to take effect.
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Local zone name [NOM_DE_DOMAINE_DE_VM]:
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Parent zone name [master]:
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Default global zones: global-templates director-global
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Do you want to specify additional global zones? [y/N]:
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Do you want to disable the inclusion of the conf.d directory [Y/n]:
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Disabling the inclusion of the conf.d directory...
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Done.
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Now restart your Icinga 2 daemon to finish the installation!
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</details>
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## Créer le fichier de zone pour la nouvelle machine dans isengard.libre-en-communs.org
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<details>
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<summary>/etc/icinga2/zones.d/master/NOM_DE_DOMAINE_DE_VM.conf</summary>
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object Endpoint "NOM_DE_DOMAINE_DE_VM" {
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}
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object Zone "NOM_DE_DOMAINE_DE_VM" {
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endpoints = [ "NOM_DE_DOMAINE_DE_VM" ]
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parent = "master"
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}
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object Host "NOM_DE_DOMAINE_DE_VM" {
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import "generic-host"
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address = "NOM_DE_DOMAINE_DE_VM"
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address6 = "NOM_DE_DOMAINE_DE_VM"
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vars.os = "GNU/Linux"
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vars.client_endpoint = name
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vars.notification["mail"] = {
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groups = [ "icingaadmins" ]
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}
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}
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</details>
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