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--- navody:distribuce:nixos [2017/10/31 08:48] – [Common issues] ssh, systemd232/233 rmarko
+++ navody:distribuce:nixos [2019/03/11 11:29] – added information about firewall by default and how to set it up martyet
@@ Řádek 1: / Řádek 1: @@
 ===== NixOS =====
-NixOS template is available based on NixOS 17.03. NixOS allows declarative configuration management of the whole system and deployed services.
+NixOS allows declarative configuration management of the whole system and deployed services.
+To start using NixOS choose **[vpsAdminOS] NixOS** template.
+If you have set your public SSH keys in vpsAdmin the key will be automatically deployed and you can login as root right away. To be able to login with a password you need to set the password manually after your container is created.
+==== Initial setup & informations ====
+After installing NixOS (mainly talking about stable release) you **have to know**, that there is activated firewall by default blocking everything except ssh (port no. 22) so if you want to run some webserver (for example nginx) you have to tell firewall to not block your ports with this in your /etc/nixos/configuration.nix:nixos
+<code>networking.firewall.allowedTCPPorts = [ 80 443 ];</code>
+Then dont forget to do
+<code> nixos-rebuild switch</code> so your changes will take effect (without rebooting)
 ==== Configuration ====
@@ Řádek 8: / Řádek 23: @@
 This can be altered to change container configuration on the fly or for next reboot. Try changing container hostname and running <code>nixos-rebuild switch</code> to build new configuration and directly switch to it. To switch to new configuration after reboot (set as a default boot profile) use <code>nixos-rebuild boot</code>
+If you are using channels you can update your system by running <code>nixos-rebuild switch --upgrade</code>
 ==== Package installation ====
@@ Řádek 20: / Řádek 37: @@
 Consult NixOS manual for more https://nixos.org/nixos/manual/
+===== Legacy OpenVZ templates =====
+<note important>Due to compatibility issues with OpenVZ it is no longer recommended to use the old infrastructure for new deployments.</note>
 ==== Common issues ====
@@ Řádek 76: / Řádek 98: @@
     ERRNO=40
     MESSAGE=Failed to canonicalize path /etc/systemd/system/local-fs.target.d: Too many levels of symbolic links
-$ # strace output
-open("/etc/systemd/system/local-fs.target", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = -1 ELOOP (Too many levels of symbolic links)
-readlinkat(AT_FDCWD, "/etc/systemd/system/local-fs.target", "/nix/store/n5ksbh1hx275zfbqbalhg"..., 99) = 94
-open("/nix/store/n5ksbh1hx275zfbqbalhghzpxp1w73lf-systemd-234/example/systemd/system/local-fs.target", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = 12
-fcntl(12, F_GETFL)              = 0xa8000 (flags O_RDONLY|O_LARGEFILE|O_NOFOLLOW|O_CLOEXEC)
-fstat(12, {st_mode=S_IFREG|0444, st_size=507, ...}) = 0
-fstat(12, {st_mode=S_IFREG|0444, st_size=507, ...}) = 0
-getpid()                        = 1
-fstat(12, {st_mode=S_IFREG|0444, st_size=507, ...}) = 0
-read(12, "#  This file is part of systemd."..., 512) = 507
-open("/dev/urandom", O_RDONLY|O_NOCTTY|O_CLOEXEC) = 13
-read(13, "\26\265jV\260\276\7\3300\22J\264m~j\37", 16) = 16
-close(13)                       = 0
-read(12, "", 512)               = 0
-close(12)                       = 0
-open("/", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 12
-openat(12, "etc", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 13
-fstat(13, {st_mode=S_IFDIR|0755, st_size=50, ...}) = 0
-close(12)                       = 0
-openat(13, "systemd", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 12
-fstat(12, {st_mode=S_IFDIR|0755, st_size=10, ...}) = 0
-close(13)                       = 0
-openat(12, "system", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = -1 ELOOP (Too many levels of symbolic links)
-close(12)                       = 0
-writev(3, [{"Failed to canonicalize path /etc"..., 104}, {"\n", 1}], 2) = 105
-open("/", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 12
-openat(12, "etc", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 13
-fstat(13, {st_mode=S_IFDIR|0755, st_size=50, ...}) = 0
-close(12)                       = 0
-openat(13, "systemd", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = 12
-fstat(12, {st_mode=S_IFDIR|0755, st_size=10, ...}) = 0
-close(13)                       = 0
-openat(12, "system", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|0x200000) = -1 ELOOP (Too many levels of symbolic links)
-close(12)                       = 0
-writev(3, [{"Failed to canonicalize path /etc"..., 100}, {"\n", 1}], 2) = 101
-open("/etc/systemd/system/emergency.target", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = -1 ELOOP (Too many levels of symbolic links)
-readlinkat(AT_FDCWD, "/etc/systemd/system/emergency.target", "/nix/store/n5ksbh1hx275zfbqbalhg"..., 99) = 95
-open("/nix/store/n5ksbh1hx275zfbqbalhghzpxp1w73lf-systemd-234/example/systemd/system/emergency.target", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = 12
-fcntl(12, F_GETFL)              = 0xa8000 (flags O_RDONLY|O_LARGEFILE|O_NOFOLLOW|O_CLOEXEC
-</code>

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