{"id":31439,"date":"2019-10-31T21:41:16","date_gmt":"2019-10-31T18:41:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-sistemnogo-menedzhera-systemd-242\/"},"modified":"2019-10-31T21:41:16","modified_gmt":"2019-10-31T18:41:16","slug":"vypusk-sistemnogo-menedzhera-systemd-242","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypusk-sistemnogo-menedzhera-systemd-242","title":{"rendered":"Udgivelsen af systemmanageren systemd 242","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Efter to m\u00e5neders udvikling er systemadministratoren systemd 242 blevet frigivet. Blandt nyhederne kan n\u00e6vnes underst\u00f8ttelse af L2TP-tunneler, muligheden for at styre systemd-loginds adf\u00e6rd ved genstart gennem milj\u00f8variabler, underst\u00f8ttelse af udvidede boot-partitioner XBOOTLDR til montering af \/boot, mulighed for opstart med roden i overlayfs og et stort antal nye indstillinger for forskellige typer enheder.<\/p>\n<p>Vigtige \u00e6ndringer: <\/p>\n<ul>\n<li class=\"l\"> systemd-networkd underst\u00f8tter L2TP-tunneler;\n<li class=\"l\"> I sd-boot og bootctl er der implementeret underst\u00f8ttelse af XBOOTLDR-partitioner (Extended Boot Loader), der er beregnet til montering i \/boot, ud over ESP-partitioner, der monteres i \/efi eller \/boot\/efi. Kerner, indstillinger, initrd-billeder og EFI kan nu indl\u00e6ses fra b\u00e5de ESP-partitioner og XBOOTLDR-partitioner. Denne \u00e6ndring g\u00f8r det muligt at bruge bootloaderen sd-boot i mere konservative scenarier, hvor selve bootloaderen ligger i ESP, mens de indl\u00e6ste kerner og relaterede metadata placeres i en separat partition;\n<li class=\"l\"> Der mulighed for at uploade med indstillingen \u00absystemd.volatile=overlay\u00bb er blevet tilf\u00f8jet, hvilket tillader at placere rodkataloget i overlayfs og organisere arbejdet ovenp\u00e5 et skrivebeskyttet rodkatalog med \u00e6ndringer, der skrives til en separat mappe i tmpfs (\u00e6ndringer i denne konfiguration g\u00e5r tabt efter genstart). P\u00e5 lignende m\u00e5de er indstillingen \u00ab--volatile=overlay\u00bb blevet tilf\u00f8jet i systemd-nspawn for at bruge tilsvarende funktionalitet i containere;\n<li class=\"l\"> Indstillingen \u00ab--oci-bundle\u00bb er blevet tilf\u00f8jet i systemd-nspawn, hvilket muligg\u00f8r brugen af runtime-s\u00e6t til at sikre isoleret k\u00f8rsel af containere, der overholder kravene i Open Container Initiative (OCI) specifikationen. For brug i kommandolinjen og nspawn-enheder er der foresl\u00e5et support for forskellige indstillinger beskrevet i OCI-specifikationen, eksempelvis kan indstillingerne \u00ab--inaccessible\u00bb og \u00abInaccessible\u00bb bruges til at ekskludere dele af filsystemet, og for at konfigurere standard udgangsstr\u00f8mme er indstillingerne \u00ab--console\u00bb og \u00ab--pipe\u00bb tilf\u00f8jet;\n<li class=\"l\"> Der er tilf\u00f8jet mulighed for at styre systemd-loginds adf\u00e6rd gennem milj\u00f8variabler: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP,<br \/>\n          $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU og<br \/>\n          $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY. Med disse variabler kan du tilslutte dine egne h\u00e5ndteringsprocesser for genstart ( \/run\/systemd\/reboot-to-firmware-setup, \/run\/systemd\/reboot-to-boot-loader-menu og<br \/>\n          \/run\/systemd\/reboot-to-boot-loader-entry) \u0438\u043b\u0438 \u0432\u043e\u043e\u0431\u0449\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0438\u0445 (\u043f\u0440\u0438 \u0432\u044b\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 false);<\/p>\n<li class=\"l\"> Der er tilf\u00f8jet indstillingerne \u00ab--boot-load-menu=\u00bb og<br \/>\n          \u00ab--boot-loader-entry=\u00bb, som tillader at v\u00e6lge et specifikt punkt i boot-menuen eller boot-tilstand efter genstart;<\/p>\n<li class=\"l\"> En ny sandbox-isoleringskommando \u00abRestrictSUIDSGID=\u00bb er blevet tilf\u00f8jet, som bruger seccomp til at forbyde oprettelsen af filer med SUID\/SGID-flags;\n<li class=\"l\"> Det er nu som standard sikret, at begr\u00e6nsningerne \u00abNoNewPrivileges\u00bb og \u00abRestrictSUIDSGID\u00bb anvendes i enheder med aktiveret dynamisk bruger-id-generering (\u00abDynamicUser\u00bb);\n<li class=\"l\"> Den som standard anvendte indstilling i .link-filer, MACAddressPolicy=persistent, er blevet \u00e6ndret for at omfatte et st\u00f8rre antal enheder. Nettv\u00e6rksbroers, tunnelers (tun, tap) og sammensatte links (bond) identificerer sig ikke andet end ved navn, s\u00e5 dette navn bruges nu som grundlag for at knytte MAC- og IPv4-adresser. Desuden er indstillingen \u00abMACAddressPolicy=random\u00bb tilf\u00f8jet, som kan bruges til at tilknytte MAC- og IPv4-adresser til enheder i tilf\u00e6ldig r\u00e6kkef\u00f8lge;\n<li class=\"l\"> De enheder, der genereres gennem systemd-fstab-generator, inkluderer nu ikke de tilsvarende .mount-enheder som afh\u00e6ngigheder i sektionen 'Wants='. En enkel tilslutning af enheden medf\u00f8rer nu ikke automatisk opstart af monteringsenheden, men s\u00e5danne enheder kan stadig startes af andre grunde, for eksempel som en del af local-fs.target eller som afh\u00e6ngighed af andre enheder, der afh\u00e6nger af local-fs.target;\n<li class=\"l\"> Der er tilf\u00f8jet underst\u00f8ttelse af masker ('*' osv.) i kommandoerne 'networkctl list\/status\/lldp' til at filtrere bestemte grupper af netv\u00e6rksinterfaces baseret p\u00e5 deres navn;\n<li class=\"l\"> Milj\u00f8variablen $PIDFILE ops\u00e6ttes nu ved hj\u00e6lp af den absolutte sti, der er konfigureret i tjenesterne via parameteren 'PIDFile=;\n<li class=\"l\"> Offentlige DNS-servere er tilf\u00f8jet til listen over backup DNS-servere, der bruges, hvis der ikke er angivet en prim\u00e6r DNS; <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/\"   title=\"servere\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1823\">servere<\/a>  Cloudflare (1.1.1.1). For at overskrive listen af backup DNS-servere kan indstillingen '-Ddns-servers=' bruges;\n<li class=\"l\"> N\u00e5r en USB-enhedskontroller (USB Device Controller) identificeres, sikres automatisk start af den nye behandler usb-gadget.target (n\u00e5r systemet k\u00f8rer p\u00e5 det perifere USB-enhed);\n<li class=\"l\"> For unit-filer er indstillingen 'CPUQuotaPeriodSec=' implementeret, som definerer en tidsperiode, hvormed kvoten for CPU-tid m\u00e5les, fastsat gennem indstillingen 'CPUQuota=';\n<li class=\"l\"> For unit-filer er indstillingen 'ProtectHostname=' implementeret, som forbyder tjenester at \u00e6ndre v\u00e6rtsnavnsoplysninger, selv med de n\u00f8dvendige bef\u00f8jelser;\n<li class=\"l\"> For unit-filer er indstillingen 'NetworkNamespacePath=' implementeret, som tillader binding af namespace til tjenester eller socket-enheder ved at angive stien til namespace-filen i det pseudo-filssystem \/proc;\n<li class=\"l\"> Muligheden for at deaktivere variabelsubstitution for processer, der startes ved hj\u00e6lp af indstillingen 'ExecStart=', er tilf\u00f8jet ved at tilf\u00f8je symbolet ':' f\u00f8r startkommandoen;\n<li class=\"l\"> Der er foresl\u00e5et nye flag 'OnClockChange=' og<br \/>\n'OnTimezoneChange=', ved hj\u00e6lp af hvilke enhedens opkald kan styres ved \u00e6ndringer af systemtiden eller tidszonen;<\/p>\n<li class=\"l\"> Nye indstillinger 'ConditionMemory=' og 'ConditionCPUs=' er tilf\u00f8jet, som bestemmer enhedens opkaldsbetingelser baseret p\u00e5 st\u00f8rrelsen af hukommelsen og antallet af CPU-kerner (for eksempel kan en ressourcekr\u00e6vende tjeneste kun startes, hvis der er tilstr\u00e6kkelig RAM);\n<li class=\"l\"> A new unit time-set.target has been added, accepting locally set system time without using synchronization with external time servers via the time-sync.target unit. This new unit can be utilized by services that require the accuracy of unsynchronized local clocks;\n<li class=\"l\"> Der er tilf\u00f8jet en mulighed '--show-transaction' til 'systemctl start' og lignende kommandoer, som, n\u00e5r den angives, pr\u00e6senterer et sammendrag af alle opgaver, der er tilf\u00f8jet til k\u00f8en som f\u00f8lge af den anmodede operation;\n<li class=\"l\"> I systemd-networkd er der implementeret en ny tilstand &#8216;enslaved&#8217;, som bruges i stedet for &#8216;degraded&#8217; eller &#8216;carrier&#8217; for netv\u00e6rksgr\u00e6nseflader, der indg\u00e5r i aggregerede links eller netv\u00e6rksbroer. For prim\u00e6re gr\u00e6nseflader er der i tilf\u00e6lde af problemer med et af de sammensatte links tilf\u00f8jet tilstanden &#8216;degraded-carrier&#8217;;\n<li class=\"l\"> Der er tilf\u00f8jet en mulighed &#171;IgnoreCarrierLoss=&#187; til .network enheder for at bevare netv\u00e6rksindstillingerne i tilf\u00e6lde af forbindelsestab;\n<li class=\"l\"> Gennem indstillingen &#171;RequiredForOnline=&#187; i .network enheder kan man nu angive den minimale tilladte tilstand for linket, n\u00f8dvendig for at s\u00e6tte netv\u00e6rksgr\u00e6nsefladen i &#171;online&#187; og aktivere systemd-networkd-wait-online-behandleren;\n<li class=\"l\"> I systemd-networkd-wait-online er der tilf\u00f8jet en mulighed &#171;&#8212;any&#187; for at vente p\u00e5, at qualsiasi af de angivne netv\u00e6rksgr\u00e6nseflader er klar i stedet for alle, samt en mulighed &#171;&#8212;operational-state=&#187; for at bestemme linkets tilstand, der indikerer klarhed;\n<li class=\"l\"> I .network enheder er der tilf\u00f8jet indstillingerne &#171;UseAutonomousPrefix=&#187; og &#171;UseOnLinkPrefix=&#187;, som kan bruges til at ignorere pr\u00e6fikser ved modtagelse;<br \/>\naf meddelelsen fra IPv6-routeren (RA, Router Advertisement);<\/p>\n<li class=\"l\"> I .network enheder er der tilf\u00f8jet indstillingerne &#171;MulticastFlood=&#187;, &#171;NeighborSuppression=&#187; og &#171;Learning=&#187; for at \u00e6ndre parametrene for netv\u00e6rksbroens funktion, samt indstillingen &#171;TripleSampling=&#187; for at \u00e6ndre TRIPLE-SAMPLING-tilstanden for virtuelle CAN-gr\u00e6nseflader;\n<li class=\"l\"> I .netdev enheder er der tilf\u00f8jet indstillingerne &#171;PrivateKeyFile=&#187; og &#171;PresharedKeyFile=&#187;, hvormed man kan angive private og delt (PSK) n\u00f8gler for WireGuard-gr\u00e6nseflader; <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"31\">VPN<\/a>;\n<li class=\"l\"> I \/etc\/crypttab er der tilf\u00f8jet indstillingerne same-cpu-crypt og submit-from-crypt-cpus, der styrer schedulerens opf\u00f8rsel ved migration mellem CPU-kerner for arbejde relateret til kryptering;\n<li class=\"l\"> I systemd-tmpfiles er der sikret behandling af l\u00e5sefilen f\u00f8r udf\u00f8relsen af operationer i mapper med midlertidige filer, hvilket g\u00f8r det muligt at deaktivere oprydning af for\u00e6ldede filer i en periode (f.eks. ved uddragning af en tar-arkiv til \/tmp kan meget gamle filer blive tilg\u00e6ngelige, som ikke kan slettes, f\u00f8r handlingen med dem er afsluttet);\n<li class=\"l\"> I kommandoen &#171;systemd-analyze cat-config&#187; er der mulighed for at analysere konfigurationen, der er fordelt p\u00e5 flere filer, s\u00e5som brugerdefinerede og systempr\u00e6ferencer, indhold af tmpfiles.d og sysusers.d, udev regler osv.\n<li class=\"l\"> I &#171;journalctl&#187; er der tilf\u00f8jet en mulighed &#171;&#8212;cursor-file=&#187; for at angive en fil til at indl\u00e6se og gemme positionspekeren;\n<li class=\"l\"> I systemd-detect-virt er der tilf\u00f8jet en identifikation af hypervisoren ACRN og subsystemet WSL (Windows Subsystem for Linux) for efterf\u00f8lgende forgrening ved hj\u00e6lp af den betingede operator &#171;ConditionVirtualization&#187;;\n<li class=\"l\"> Under installation af systemd (ved at udf\u00f8re &#171;ninja install&#187;) er oprettelsen af symboliske links til filerne systemd-networkd.service, systemd-networkd.socket i kataloget \/etc stoppet;<br \/>\n          systemd-resolved.service, remote-cryptsetup.target, remote-fs.target,<br \/>\n          systemd-networkd-wait-online.service og systemd-timesyncd.service. For at oprette disse filer er det nu n\u00f8dvendigt at udf\u00f8re kommandoen &#171;systemctl preset-all&#187;.<\/p>\n<\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50497\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0433\u043e \u043c\u0435\u043d\u0435\u0434\u0436\u0435\u0440\u0430 systemd 242. \u0418\u0437 \u043d\u043e\u0432\u0448\u0435\u0441\u0442\u0432 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0442\u0443\u043d\u043d\u0435\u043b\u0435\u0439 L2TP, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435\u043c systemd-logind \u043f\u0440\u0438 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0443\u0441\u043a\u0435 \u0447\u0435\u0440\u0435\u0437 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u0433\u0440\u0443\u0437\u043e\u0447\u043d\u044b\u0445 \u0440\u0430\u0437\u0434\u0435\u043b\u043e\u0432 XBOOTLDR \u0434\u043b\u044f \u043c\u043e\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \/boot, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u0441 \u043a\u043e\u0440\u043d\u0435\u0432\u044b\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u043e\u043c \u0432 overlayfs, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u043d\u043e\u0432\u044b\u0445 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043a \u0434\u043b\u044f \u0440\u0430\u0437\u043d\u044b\u0445 \u0442\u0438\u043f\u043e\u0432 \u044e\u043d\u0438\u0442\u043e\u0432. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0412 systemd-networkd [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-31439","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta 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