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--- настройка_сети_в_linux [2022/02/23 13:46]
val [Файлы конфигурации Debian/Ubuntu16]
+++ настройка_сети_в_linux [2024/06/13 11:57]
val [Команды для диагностики]
@@ Line 78: / Line 78: @@
 # ss -anptu
+# ss -lnp | grep ':80'
+# количество подключений с каждого адреса (https://serverfault.com/questions/421310/check-the-number-of-active-connections-on-port-80)
+# ss -tn src :80 or src :443 | tr -s ' ' | cut -d ' ' -f5  | cut -d ':' -f1 | sort | uniq -c | sort -n
 </code>
@@ Line 90: / Line 94: @@
 <code>
+# hostnamectl set-hostname server.corpX.un
+# cat /etc/hostname
+</code><code>
+server.corpX.un
+</code>
 # cat /etc/hosts
 </code><code>
@@ Line 111: / Line 122: @@
 === Статическая настройка параметров ===
 <code>
-# cat /etc/hostname
-</code><code>
-server.corpX.un
-</code><code>
 # cat /etc/network/interfaces
 </code><code>
@@ Line 178: / Line 185: @@
 <code>
+client1# dhclient eth0
 client1# cat /etc/hostname
 </code><code>
@@ Line 183: / Line 192: @@
 </code><code>
 client1# :> /etc/resolv.conf
-</code><code>
+</code>
+или [[Система безопасности UNIX#Команда chattr]]
+<code>
 client1# cat /etc/hosts
 </code><code>
@@ Line 217: / Line 230: @@
   * [[https://unix.stackexchange.com/questions/588658/override-ubuntu-20-04-dns-using-systemd-resolved|Override Ubuntu 20.04 DNS using systemd-resolved]]
-=== Без cloud-init ===
+=== Отключение cloud-init ===
 <code>
-cat /etc/cloud/cloud.cfg
+# apt purge cloud-init
-</code><code>
+</code>
-...
-preserve_hostname: true
-...
-</code><code>
-# hostnamectl set-hostname ubuntu.corpX.un
-</code><code>
-# echo 'network: {config: disabled}' > /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
-ubuntu18# rm /etc/netplan/50-cloud-init.yaml
+=== Настройка Netplan ===
-ubuntu20# rm /etc/netplan/00-installer-config.yaml
+  * [[Формат YAML]]
+  * [[https://netplan.io/faq/|Netplan FAQ]]
+  * [[https://netplan.io/examples/|Netplan configuration examples]] !!! Все варианты !!!
+<code>
 # cat /etc/netplan/01-netcfg.yaml
 </code><code>
@@ Line 241: / Line 250: @@
       addresses: [172.16.1.200+X/24]
       gateway4: 172.16.1.254
+#      routes:
+#        - to: default
+#          via: 172.16.1.254
 #      nameservers:
 #        addresses: [172.16.1.254]
 </code><code>
+# netplan try
 # netplan apply
+</code>
+=== Отключение Netpaln ===
+  * [[https://linuxconfig.org/how-to-switch-back-networking-to-etc-network-interfaces-on-ubuntu-20-04-focal-fossa-linux|How to switch back networking to /etc/network/interfaces on Ubuntu 20.04 Focal Fossa Linux]]
+<code>
+# apt install ifupdown net-tools
+ubuntu20/22# rm /etc/netplan/00-installer-config.yaml
+ubuntu24# rm /etc/netplan/50-cloud-init.yaml
+</code>
+=== Настройка systemd-resolved ===
+  * [[https://wiki.archlinux.org/title/Systemd-resolved_(%D0%A0%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%B9)|archlinux systemd-resolved (Русский)]]
+<code>
 # cat /etc/resolv.conf
 </code><code>
@@ Line 251: / Line 285: @@
 nameserver 127.0.0.53
 </code><code>
+# resolvectl status
+  или
+# systemd-resolve --status
 # cat /etc/systemd/resolved.conf
 </code><code>
 [Resolve]
 DNS=172.16.1.254
+</code><code>
+# systemctl restart systemd-resolved
 </code>
-=== Без Netpaln ===
+=== Отключение systemd-resolved ===
-  * [[https://linuxconfig.org/how-to-switch-back-networking-to-etc-network-interfaces-on-ubuntu-20-04-focal-fossa-linux|How to switch back networking to /etc/network/interfaces on Ubuntu 20.04 Focal Fossa Linux]]
+  * [[https://gist.github.com/zoilomora/f7d264cefbb589f3f1b1fc2cea2c844c|How to disable systemd-resolved in Ubuntu]]
 <code>
-# apt install ifupdown net-tools
+# systemctl disable systemd-resolved
-</code>
-=== Без systemd-resolved ===
+# systemctl stop systemd-resolved
-  * [[https://gist.github.com/zoilomora/f7d264cefbb589f3f1b1fc2cea2c844c|How to disable systemd-resolved in Ubuntu]]
-<code>
+# rm /etc/resolv.conf    # this is link
-# systemctl disable systemd-resolved.service
-# systemctl stop systemd-resolved
 </code>
 ==== Файлы конфигурации CentOS/SL/RHEL ====
@@ Line 362: / Line 399: @@
   * [[https://www.andreyus.com/otkazoustoychivost-dostupa-k-seti-v-linux/|Отказоустойчивость доступа к сети в Linux]]
   * [[https://netberg.ru/supports/article/ethernet-bonding/|Ethernet bonding — это объединение двух или более физических сетевых интерфейсов в один виртуальный для обеспечения отказоустойчивости и повышения пропускной способности]]
+==== bond ifupdown ====
+<code>
+# apt install ifenslave
+# cat /etc/network/interfaces
+</code><code>
+...
+iface eth0 inet manual
+iface eth1 inet manual
+auto bond0
+iface bond0 inet static
+        address 192.168.X.10
+        netmask 255.255.255.0
+        gateway 192.168.X.1
+        slaves eth0 eth1
+        bond-mode active-backup
+        bond-miimon 100
+        bond-primary eth0
+</code>
+==== bond netplan ====
+<code>
+# cat /etc/netplan/01-netcfg.yaml
+</code><code>
+network:
+  version: 2
+  bonds:
+    bond0:
+      addresses: [192.168.X.10/24]
+      gateway4: 192.168.X.1
+      interfaces: [eth0, eth1]
+      parameters:
+        mode: active-backup
+        mii-monitor-interval: 100
+        primary: eth0
+  ethernets:
+    eth0: {}
+    eth1: {}
+</code>
+==== Отладка ====
+<code>
+# cat /proc/net/bonding/bond0
+</code>

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