{"id":2333,"date":"2018-02-07T10:14:16","date_gmt":"2018-02-07T09:14:16","guid":{"rendered":"https:\/\/pcll.ac-dijon.fr\/eole\/?p=2333"},"modified":"2018-02-07T10:14:16","modified_gmt":"2018-02-07T09:14:16","slug":"hackathon-compte-rendu-groupe-systemd-plein-de-possibilites","status":"publish","type":"post","link":"https:\/\/pcll.ac-dijon.fr\/eole\/hackathon-compte-rendu-groupe-systemd-plein-de-possibilites\/","title":{"rendered":"Hackathon : compte rendu du groupe systemd\u2026 plein de possibilit\u00e9s"},"content":{"rendered":"

L’objectif de ce groupe de travail \u00e9tait de monter en comp\u00e9tences sur l’utilisation\/l’int\u00e9gration des diff\u00e9rents composants de systemd \u00e0 savoir : systemd-networkd, systemd-resolved, journarld, systemd-nspawn…<\/strong><\/p>\n

En effet, actuellement sur EOLE 2.6, systemd g\u00e8re uniquement les services, il se contente d’assurer le passage de System V \u00e0 systemd.<\/p>\n

Qu’est ce que systemd ?<\/h2>\n

systemd<\/a> est un syst\u00e8me d\u2019initialisation et un daemon qui a \u00e9t\u00e9 sp\u00e9cifiquement con\u00e7u pour le noyau Linux comme alternative \u00e0 System V<\/a>.
\nIl a pour but d’offrir un meilleur cadre pour la gestion des d\u00e9pendances entre services, de permettre le chargement en parall\u00e8le des services au d\u00e9marrage, et de r\u00e9duire les appels aux scripts shell. Le projet a \u00e9t\u00e9 lanc\u00e9 par Lennart Poettering en 2010 et publi\u00e9 sous licence GNU LGPL version 2.12. Le nom de ce programme vient de \u00ab system daemon \u00bb : le daemon du syst\u00e8me.<\/p>\n

Source Wikip\u00e9dia : https:\/\/fr.wikipedia.org\/wiki\/Systemd<\/a><\/p>\n

\"\"<\/a>

Composants de systemd – image de Claudelepoisson sous licence CC by-sa 3.0<\/p><\/div>\n

Le site officiel du projet : https:\/\/wiki.freedesktop.org\/www\/Software\/systemd\/<\/a><\/p>\n

Quelques autres possibilit\u00e9s<\/h2>\n

En plus de systemd-networkd, de systemd-resolved et de systemd-container systemd offre plein d’autres possibilit\u00e9s…<\/p>\n

Gestion des locales<\/h3>\n
root@eolebase:~# localectl\r\n System Locale: LANG=fr_FR.UTF-8\r\n VC Keymap: n\/a\r\n X11 Layout: fr\r\n X11 Model: pc105\r\n X11 Variant: oss<\/pre>\n
Gestion de l’horloge syst\u00e8me et du NTP<\/h3>\n
root@eolebase:~# timedatectl\r\n Local time: mer. 2017-11-22 16:26:07 CET\r\n Universal time: mer. 2017-11-22 15:26:07 UTC\r\n RTC time: mer. 2017-11-22 15:26:07\r\n Time zone: Europe\/Paris (CET, +0100)\r\n Network time on: yes\r\n NTP synchronized: yes\r\n RTC in local TZ: no<\/pre>\n
root@eolebase:~# systemctl stop ntp<\/pre>\n
root@eolebase:~#\u00a0 systemctl disable ntp\r\n chmod -x \/usr\/sbin\/ntpd<\/pre>\n
root@eolebase:~# cat \/etc\/systemd\/timesyncd.conf\r\n [Time]\r\n NTP=ntp.i2\r\n FallbackNTP=ntp.ubuntu.com<\/pre>\n
root@eolebase:~# systemctl start systemd-timesyncd<\/pre>\n
root@eolebase:~# systemctl status systemd-timesyncd<\/pre>\n
Gestion de l’h\u00f4te<\/h3>\n
root@eolebase:~# hostnamectl \r\n Static hostname: eolebase\r\n Icon name: computer-vm\r\n Chassis: vm\r\n Machine ID: 587bf4ce615c4e70869e5c0d54dcc3ac\r\n Boot ID: 7d3ac68647a24e9a840618b4e2c2aeff\r\n Virtualization: qemu\r\n Operating System: Ubuntu 16.04.2 LTS\r\n Kernel: Linux 4.4.0-62-generic\r\n Architecture: x86-64<\/pre>\n
Gestion des sessions utilisateurs<\/h3>\n
root@eolebase:~# loginctl -a\r\n SESSION UID USER SEAT \r\n 22 0 root \r\n 1 0 root seat0 \r\n 2 0 root \r\n 26 1000 eole<\/pre>\n
Commandes utiles<\/h2>\n
Voici un document PDF en anglais qui liste les commandes de r\u00e9f\u00e9rences : https:\/\/access.redhat.com\/sites\/default\/files\/attachments\/rh_systemd_reference_card_0914_jcs_print_2.pdf<\/a><\/p>\n
Gestion des services avec systemctl<\/h3>\n
    \n
  • systemctl daemon-reload : recharge la configuration (imp\u00e9ratif pour que les modifications soient prises en compte)<\/li>\n
  • systemctl is-active creoled.service : v\u00e9rifie si le service est actif<\/li>\n
  • systemctl –state=failed –no-legend : liste les services en erreur (utilis\u00e9 dans diagnose)<\/li>\n
  • systemctl is-system-running : v\u00e9rifie si le syst\u00e8me est op\u00e9rationnel (tous les services sont-ils op\u00e9rationnels ?)<\/li>\n
  • systemctl list-dependencies<\/li>\n
  • systemctl list-units (–all)<\/li>\n
  • systemctl list-unit-files –state=enabled<\/li>\n
  • systemctl show creoled.service<\/li>\n
  • systemctl show -p \u00ab\u00a0Wants\u00a0\u00bb isc-dhcp-server : affichage des d\u00e9pendance<\/li>\n<\/ul>\n
    Journaux et analyse<\/h3>\n
      \n
    • journalctl –full<\/li>\n
    • journalctl -xe : consulter les journaux d’\u00e9v\u00e9nement<\/li>\n
    • journalctl -xe -u exim4.service -u ssh.service -f : consulter les journaux de certains services en mode \u00ab\u00a0follow\u00a0\u00bb<\/li>\n
    • systemd-analyze<\/li>\n
    • systemd-analyze blame –> temps de chargement des services<\/li>\n
    • systemd-analyze plot > \/tmp\/plot.svg && sux – genconfig chromium-browser \/tmp\/plot.svg<\/li>\n<\/ul>\n
      Visualiser les configurations surcharg\u00e9s (overridden)<\/h3>\n
      root@eolebase:~# systemd-delta\r\n[MASKED] \/etc\/systemd\/system\/apt-daily.service \u2192 \/lib\/systemd\/system\/apt-daily.service\r\n[MASKED] \/etc\/systemd\/system\/apt-daily.timer \u2192 \/lib\/systemd\/system\/apt-daily.timer\r\n[EXTENDED] \/lib\/systemd\/system\/systemd-timesyncd.service \u2192 \/lib\/systemd\/system\/systemd-timesyncd.service.d\/disable-with-time-daemon.conf\r\n[EXTENDED] \/lib\/systemd\/system\/rc-local.service \u2192 \/lib\/systemd\/system\/rc-local.service.d\/debian.conf\r\n4 overridden configuration files found.<\/pre>\n
      Effectuer une r\u00e9solution de noms<\/h3>\n
      root@eolebase:~# systemd-resolve free.fr\r\nfree.fr: 212.27.48.10\r\n\r\n-- Information acquired via protocol DNS in 35.2ms.\r\n-- Data is authenticated: no<\/pre>\n","protected":false},"excerpt":{"rendered":"
      L’objectif de ce groupe de travail \u00e9tait de monter en comp\u00e9tences sur l’utilisation\/l’int\u00e9gration des diff\u00e9rents composants de systemd \u00e0 savoir : systemd-networkd, systemd-resolved, journarld, systemd-nspawn… En effet, actuellement sur EOLE 2.6, systemd g\u00e8re uniquement les services, il se contente d’assurer le passage de System V \u00e0 systemd. Qu’est ce que systemd ? systemd est un […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,3],"tags":[14,13,64],"class_list":["post-2333","post","type-post","status-publish","format-standard","hentry","category-evenements","category-technique","tag-compte-rendu","tag-hackathon","tag-systemd"],"acf":[],"yoast_head":"\nHackathon : compte rendu du groupe systemd\u2026 plein de possibilit\u00e9s - EOLE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pcll.ac-dijon.fr\/eole\/hackathon-compte-rendu-groupe-systemd-plein-de-possibilites\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hackathon : compte rendu du groupe systemd\u2026 plein de possibilit\u00e9s - EOLE\" \/>\n<meta property=\"og:description\" content=\"L’objectif de ce groupe de travail \u00e9tait de monter en comp\u00e9tences sur l’utilisation\/l’int\u00e9gration des diff\u00e9rents composants de systemd \u00e0 savoir : systemd-networkd, systemd-resolved, journarld, systemd-nspawn… En effet, actuellement sur EOLE 2.6, systemd g\u00e8re uniquement les services, il se contente d’assurer le passage de System V \u00e0 systemd. 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