{"id":806,"date":"2025-12-31T12:14:27","date_gmt":"2025-12-31T11:14:27","guid":{"rendered":"https:\/\/blog.exterra-services.cz\/?p=806"},"modified":"2025-12-31T12:47:15","modified_gmt":"2025-12-31T11:47:15","slug":"proxmox-ve-a-synchronizace-casu-s-ntp-serverem","status":"publish","type":"post","link":"https:\/\/blog.exterra-services.cz\/index.php\/2025\/12\/31\/proxmox-ve-a-synchronizace-casu-s-ntp-serverem\/","title":{"rendered":"Proxmox VE a synchronizace \u010dasu s NTP serverem – systemd-timesyncd"},"content":{"rendered":"\n

Spr\u00e1vn\u00e1 synchronizace \u010dasu v PVE (nejen v PVE:-) je spolu se spr\u00e1vn\u00fdm nastaven\u00edm IP protokolu a DNS z\u00e1kladem \u00fasp\u011bchu. Synchronizace \u010dasu je krom\u011b jin\u00e9ho d\u016fle\u017eit\u00e1 pro funk\u010dnost PVE clusteru (p\u0159i „rozhozen\u00ed“ \u010dasu mezi nody mo\u017en\u00e1 ani cluster nevytvo\u0159\u00edte).<\/p>\n\n\n\n

Pro synchronizace syst\u00e9mov\u00e9ho \u010dasu s NTP servery slou\u017e\u00ed slu\u017eba systemd-timesyncd<\/a>. Jak na to?<\/p>\n\n\n\n

Ov\u011b\u0159te, \u017ee systemd-timesyncd je instalov\u00e1n:<\/p>\n\n\n\n

root@sr650-ext1:~# systemctl status systemd-timesyncd
Unit systemd-timesyncd.service could not be found.<\/pre>\n\n\n\n
Pokud jste dostali v\u00fd\u0161e uveden\u00fd v\u00fdstup, mus\u00edte slu\u017ebu doinstalovat:<\/p>\n\n\n\n

root@sr650-ext1:~# apt install systemd-timesyncd
Reading package lists\u2026 Done
Building dependency tree\u2026 Done
Reading state information\u2026 Done
The following packages were automatically installed and are no longer required:
proxmox-kernel-6.8.12-6-pve-signed proxmox-kernel-6.8.12-8-pve-signed
Use 'apt autoremove' to remove them.
The following packages will be REMOVED:
chrony
The following NEW packages will be installed:
systemd-timesyncd
0 upgraded, 1 newly installed, 1 to remove and 7 not upgraded.
Need to get 63.8 kB of archives.
After this operation, 503 kB disk space will be freed.
Do you want to continue? [Y\/n] y
Get:1 http:\/\/ftp.cz.debian.org\/debian bookworm\/main amd64 systemd-timesyncd amd64 252.39-1~deb12u1 [63.8 kB]
Fetched 63.8 kB in 1s (83.7 kB\/s)
(Reading database \u2026 86414 files and directories currently installed.)
Removing chrony (4.3-2+deb12u1) \u2026
Selecting previously unselected package systemd-timesyncd.
(Reading database \u2026 86382 files and directories currently installed.)
Preparing to unpack \u2026\/systemd-timesyncd_252.39-1~deb12u1_amd64.deb \u2026
Unpacking systemd-timesyncd (252.39-1~deb12u1) \u2026
Setting up systemd-timesyncd (252.39-1~deb12u1) \u2026
Creating group 'systemd-timesync' with GID 997.
Creating user 'systemd-timesync' (systemd Time Synchronization) with UID 997 and GID 997.
Created symlink \/etc\/systemd\/system\/dbus-org.freedesktop.timesync1.service \u2192 \/lib\/systemd\/system\/systemd-timesyncd.service.
Created symlink \/etc\/systemd\/system\/sysinit.target.wants\/systemd-timesyncd.service \u2192 \/lib\/systemd\/system\/systemd-timesyncd.service.
Processing triggers for dbus (1.14.10-1~deb12u1) \u2026
Processing triggers for man-db (2.11.2-2) \u2026<\/pre>\n\n\n\n
Upravte soubor \/etc\/systemd\/timesyncd.conf<\/p>\n\n\n\n
[Time]
NTP=tik.cesnet.cz
FallbackNTP=tak.cesnet.cz<\/pre>\n\n\n\n
Povolte slu\u017ebu a restartujte ji.<\/p>\n\n\n\n
root@sr650-ext1:~# systemctl enable –now systemd-timesyncd
root@sr650-ext1:~# systemctl restart –now systemd-timesyncd<\/p>\n\n\n\n
Zkontrolujte log slu\u017eby, zdali v\u0161e b\u011b\u017e\u00ed:<\/p>\n\n\n\n
root@sr650-ext1:~# journalctl -u systemd-timesyncd -f
Dec 31 12:07:06 sr650-ext1 systemd[1]: Started systemd-timesyncd.service - Network Time Synchronization.
Dec 31 12:07:07 sr650-ext1 systemd-timesyncd[2311145]: Contacted time server 195.133.18.24:123 (0.debian.pool.ntp.org).
Dec 31 12:07:07 sr650-ext1 systemd-timesyncd[2311145]: Initial clock synchronization to Wed 2025-12-31 12:07:07.066152 CET.
Dec 31 12:10:36 sr650-ext1 systemd[1]: Stopping systemd-timesyncd.service - Network Time Synchronization\u2026
Dec 31 12:10:36 sr650-ext1 systemd[1]: systemd-timesyncd.service: Deactivated successfully.
Dec 31 12:10:36 sr650-ext1 systemd[1]: Stopped systemd-timesyncd.service - Network Time Synchronization.
Dec 31 12:10:36 sr650-ext1 systemd[1]: Starting systemd-timesyncd.service - Network Time Synchronization\u2026
Dec 31 12:10:36 sr650-ext1 systemd[1]: Started systemd-timesyncd.service - Network Time Synchronization.
Dec 31 12:10:36 sr650-ext1 systemd-timesyncd[2312599]: Contacted time server 195.113.144.201:123 (tik.cesnet.cz).
Dec 31 12:10:36 sr650-ext1 systemd-timesyncd[2312599]: Initial clock synchronization to Wed 2025-12-31 12:10:36.598196 CET.<\/pre>\n\n\n\n
Jako alternativu m\u016f\u017eete pou\u017e\u00edt slu\u017ebu Chrony<\/a>. Slovy klasika „jak kter\u00fd soudruh dle chuti“:-)<\/p>\n","protected":false},"excerpt":{"rendered":"
Spr\u00e1vn\u00e1 synchronizace \u010dasu v PVE (nejen v PVE:-) je spolu se spr\u00e1vn\u00fdm nastaven\u00edm IP protokolu a DNS z\u00e1kladem \u00fasp\u011bchu. Synchronizace \u010dasu je krom\u011b jin\u00e9ho d\u016fle\u017eit\u00e1 pro funk\u010dnost PVE clusteru (p\u0159i „rozhozen\u00ed“ \u010dasu mezi nody mo\u017en\u00e1 ani cluster nevytvo\u0159\u00edte). Pro synchronizace syst\u00e9mov\u00e9ho \u010dasu s NTP servery slou\u017e\u00ed slu\u017eba systemd-timesyncd. Jak na to? Ov\u011b\u0159te, \u017ee systemd-timesyncd je […]<\/p>\n","protected":false},"author":1,"featured_media":815,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[5],"tags":[],"class_list":["post-806","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","entry","has-media"],"yoast_head":"\nProxmox VE a synchronizace \u010dasu s NTP serverem - systemd-timesyncd | Coffeespot<\/title>\n<meta name=\"description\" content=\"Synchronizace syst\u00e9mov\u00e9ho \u010dasu v Proxmox VE je kl\u00ed\u010dov\u00e1 nap\u0159. pro cluster. 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