google-compute-image: make it a module and the size tuneable (#49854)
* move GCE system configuration to `google-compute-config.nix` * remove `fetch-ssh-keys` service (disabled in comment)gstqt5
Ding Xiang Fei
Jörg Thalheim
parent
48b64cfb32
commit
88570538b3
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@ -7,9 +7,9 @@ BUCKET_NAME="${BUCKET_NAME:-nixos-cloud-images}"
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TIMESTAMP="$(date +%Y%m%d%H%M)"
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export TIMESTAMP
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nix-build '<nixpkgs/nixos>' \
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nix-build '<nixpkgs/nixos/lib/eval-config.nix>' \
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-A config.system.build.googleComputeImage \
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--arg configuration "{ imports = [ <nixpkgs/nixos/modules/virtualisation/google-compute-image.nix> ]; }" \
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--arg modules "[ <nixpkgs/nixos/modules/virtualisation/google-compute-image.nix> ]" \
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--argstr system x86_64-linux \
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-o gce \
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-j 10
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@ -1,5 +1,261 @@
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{ ... }:
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{ config, lib, pkgs, ... }:
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with lib;
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let
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gce = pkgs.google-compute-engine;
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cfg = config.virtualisation.googleComputeImage;
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in
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{
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imports = [ <nixpkgs/nixos/modules/virtualisation/google-compute-image.nix> ];
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imports = [
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../profiles/headless.nix
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../profiles/qemu-guest.nix
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];
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fileSystems."/" = {
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device = "/dev/disk/by-label/nixos";
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autoResize = true;
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};
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boot.growPartition = true;
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boot.kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
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boot.initrd.kernelModules = [ "virtio_scsi" ];
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boot.kernelModules = [ "virtio_pci" "virtio_net" ];
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# Generate a GRUB menu. Amazon's pv-grub uses this to boot our kernel/initrd.
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boot.loader.grub.device = "/dev/sda";
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boot.loader.timeout = 0;
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# Don't put old configurations in the GRUB menu. The user has no
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# way to select them anyway.
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boot.loader.grub.configurationLimit = 0;
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# Allow root logins only using the SSH key that the user specified
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# at instance creation time.
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services.openssh.enable = true;
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services.openssh.permitRootLogin = "prohibit-password";
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services.openssh.passwordAuthentication = mkDefault false;
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# Use GCE udev rules for dynamic disk volumes
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services.udev.packages = [ gce ];
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# Force getting the hostname from Google Compute.
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networking.hostName = mkDefault "";
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# Always include cryptsetup so that NixOps can use it.
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environment.systemPackages = [ pkgs.cryptsetup ];
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# Make sure GCE image does not replace host key that NixOps sets
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environment.etc."default/instance_configs.cfg".text = lib.mkDefault ''
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[InstanceSetup]
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set_host_keys = false
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'';
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# Rely on GCP's firewall instead
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networking.firewall.enable = mkDefault false;
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# Configure default metadata hostnames
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networking.extraHosts = ''
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169.254.169.254 metadata.google.internal metadata
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'';
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networking.timeServers = [ "metadata.google.internal" ];
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networking.usePredictableInterfaceNames = false;
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# GC has 1460 MTU
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networking.interfaces.eth0.mtu = 1460;
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# allow the google-accounts-daemon to manage users
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users.mutableUsers = true;
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# and allow users to sudo without password
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security.sudo.enable = true;
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security.sudo.extraConfig = ''
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%google-sudoers ALL=(ALL:ALL) NOPASSWD:ALL
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'';
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# NOTE: google-accounts tries to write to /etc/sudoers.d but the folder doesn't exist
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# FIXME: not such file or directory on dynamic SSH provisioning
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systemd.services.google-accounts-daemon = {
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description = "Google Compute Engine Accounts Daemon";
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# This daemon creates dynamic users
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enable = config.users.mutableUsers;
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after = [
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"network.target"
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"google-instance-setup.service"
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"google-network-setup.service"
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];
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requires = ["network.target"];
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wantedBy = ["multi-user.target"];
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path = with pkgs; [ shadow ];
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serviceConfig = {
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Type = "simple";
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ExecStart = "${gce}/bin/google_accounts_daemon --debug";
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};
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};
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systemd.services.google-clock-skew-daemon = {
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description = "Google Compute Engine Clock Skew Daemon";
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after = [
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"network.target"
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"google-instance-setup.service"
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"google-network-setup.service"
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];
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requires = ["network.target"];
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wantedBy = ["multi-user.target"];
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serviceConfig = {
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Type = "simple";
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ExecStart = "${gce}/bin/google_clock_skew_daemon --debug";
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};
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};
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systemd.services.google-instance-setup = {
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description = "Google Compute Engine Instance Setup";
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after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service"];
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before = ["sshd.service"];
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wants = ["local-fs.target" "network-online.target" "network.target"];
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wantedBy = [ "sshd.service" "multi-user.target" ];
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path = with pkgs; [ ethtool openssh ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_instance_setup --debug";
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Type = "oneshot";
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};
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};
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systemd.services.google-network-daemon = {
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description = "Google Compute Engine Network Daemon";
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after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service" "google-instance-setup.service"];
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wants = ["local-fs.target" "network-online.target" "network.target"];
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requires = ["network.target"];
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partOf = ["network.target"];
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wantedBy = [ "multi-user.target" ];
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path = with pkgs; [ iproute ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_network_daemon --debug";
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};
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};
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systemd.services.google-shutdown-scripts = {
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description = "Google Compute Engine Shutdown Scripts";
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after = [
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"local-fs.target"
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"network-online.target"
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"network.target"
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"rsyslog.service"
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"systemd-resolved.service"
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"google-instance-setup.service"
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"google-network-daemon.service"
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];
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wants = [ "local-fs.target" "network-online.target" "network.target"];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${pkgs.coreutils}/bin/true";
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ExecStop = "${gce}/bin/google_metadata_script_runner --debug --script-type shutdown";
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Type = "oneshot";
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RemainAfterExit = true;
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TimeoutStopSec = "infinity";
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};
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};
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systemd.services.google-startup-scripts = {
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description = "Google Compute Engine Startup Scripts";
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after = [
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"local-fs.target"
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"network-online.target"
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"network.target"
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"rsyslog.service"
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"google-instance-setup.service"
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"google-network-daemon.service"
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];
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wants = ["local-fs.target" "network-online.target" "network.target"];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_metadata_script_runner --debug --script-type startup";
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KillMode = "process";
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Type = "oneshot";
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};
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};
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# Settings taken from https://github.com/GoogleCloudPlatform/compute-image-packages/blob/master/google_config/sysctl/11-gce-network-security.conf
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boot.kernel.sysctl = {
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# Turn on SYN-flood protections. Starting with 2.6.26, there is no loss
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# of TCP functionality/features under normal conditions. When flood
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# protections kick in under high unanswered-SYN load, the system
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# should remain more stable, with a trade off of some loss of TCP
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# functionality/features (e.g. TCP Window scaling).
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"net.ipv4.tcp_syncookies" = mkDefault "1";
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# ignores source-routed packets
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"net.ipv4.conf.all.accept_source_route" = mkDefault "0";
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# ignores source-routed packets
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"net.ipv4.conf.default.accept_source_route" = mkDefault "0";
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# ignores ICMP redirects
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"net.ipv4.conf.all.accept_redirects" = mkDefault "0";
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# ignores ICMP redirects
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"net.ipv4.conf.default.accept_redirects" = mkDefault "0";
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# ignores ICMP redirects from non-GW hosts
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"net.ipv4.conf.all.secure_redirects" = mkDefault "1";
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# ignores ICMP redirects from non-GW hosts
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"net.ipv4.conf.default.secure_redirects" = mkDefault "1";
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# don't allow traffic between networks or act as a router
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"net.ipv4.ip_forward" = mkDefault "0";
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# don't allow traffic between networks or act as a router
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"net.ipv4.conf.all.send_redirects" = mkDefault "0";
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# don't allow traffic between networks or act as a router
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"net.ipv4.conf.default.send_redirects" = mkDefault "0";
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# reverse path filtering - IP spoofing protection
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"net.ipv4.conf.all.rp_filter" = mkDefault "1";
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# reverse path filtering - IP spoofing protection
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"net.ipv4.conf.default.rp_filter" = mkDefault "1";
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# ignores ICMP broadcasts to avoid participating in Smurf attacks
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"net.ipv4.icmp_echo_ignore_broadcasts" = mkDefault "1";
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# ignores bad ICMP errors
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"net.ipv4.icmp_ignore_bogus_error_responses" = mkDefault "1";
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# logs spoofed, source-routed, and redirect packets
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"net.ipv4.conf.all.log_martians" = mkDefault "1";
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# log spoofed, source-routed, and redirect packets
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"net.ipv4.conf.default.log_martians" = mkDefault "1";
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# implements RFC 1337 fix
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"net.ipv4.tcp_rfc1337" = mkDefault "1";
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# randomizes addresses of mmap base, heap, stack and VDSO page
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"kernel.randomize_va_space" = mkDefault "2";
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# Reboot the machine soon after a kernel panic.
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"kernel.panic" = mkDefault "10";
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## Not part of the original config
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# provides protection from ToCToU races
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"fs.protected_hardlinks" = mkDefault "1";
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# provides protection from ToCToU races
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"fs.protected_symlinks" = mkDefault "1";
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# makes locating kernel addresses more difficult
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"kernel.kptr_restrict" = mkDefault "1";
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# set ptrace protections
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"kernel.yama.ptrace_scope" = mkOverride 500 "1";
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# set perf only available to root
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"kernel.perf_event_paranoid" = mkDefault "2";
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};
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}
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@ -2,333 +2,59 @@
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with lib;
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let
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diskSize = 1536; # MB
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gce = pkgs.google-compute-engine;
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cfg = config.virtualisation.googleComputeImage;
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defaultConfigFile = pkgs.writeText "configuration.nix" ''
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{ ... }:
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{
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imports = [
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<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>
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];
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}
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'';
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in
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{
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imports = [ ../profiles/headless.nix ../profiles/qemu-guest.nix ];
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system.build.googleComputeImage = import ../../lib/make-disk-image.nix {
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name = "google-compute-image";
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postVM = ''
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PATH=$PATH:${pkgs.stdenv.lib.makeBinPath [ pkgs.gnutar pkgs.gzip ]}
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pushd $out
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mv $diskImage disk.raw
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tar -Szcf nixos-image-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.raw.tar.gz disk.raw
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rm $out/disk.raw
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popd
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'';
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configFile = <nixpkgs/nixos/modules/virtualisation/google-compute-config.nix>;
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format = "raw";
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inherit diskSize;
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inherit config lib pkgs;
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};
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imports = [ ./google-compute-config.nix ];
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fileSystems."/" = {
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device = "/dev/disk/by-label/nixos";
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autoResize = true;
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};
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options = {
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virtualisation.googleComputeImage.diskSize = mkOption {
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type = with types; int;
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default = 1536;
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description = ''
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Size of disk image. Unit is MB.
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'';
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};
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boot.growPartition = true;
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boot.kernelParams = [ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
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boot.initrd.kernelModules = [ "virtio_scsi" ];
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boot.kernelModules = [ "virtio_pci" "virtio_net" ];
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# Generate a GRUB menu. Amazon's pv-grub uses this to boot our kernel/initrd.
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boot.loader.grub.device = "/dev/sda";
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boot.loader.timeout = 0;
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# Don't put old configurations in the GRUB menu. The user has no
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# way to select them anyway.
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boot.loader.grub.configurationLimit = 0;
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# Allow root logins only using the SSH key that the user specified
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# at instance creation time.
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services.openssh.enable = true;
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services.openssh.permitRootLogin = "prohibit-password";
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services.openssh.passwordAuthentication = mkDefault false;
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# Use GCE udev rules for dynamic disk volumes
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services.udev.packages = [ gce ];
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# Force getting the hostname from Google Compute.
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networking.hostName = mkDefault "";
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# Always include cryptsetup so that NixOps can use it.
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environment.systemPackages = [ pkgs.cryptsetup ];
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# Make sure GCE image does not replace host key that NixOps sets
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environment.etc."default/instance_configs.cfg".text = lib.mkDefault ''
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[InstanceSetup]
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set_host_keys = false
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'';
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# Rely on GCP's firewall instead
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networking.firewall.enable = mkDefault false;
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# Configure default metadata hostnames
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networking.extraHosts = ''
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169.254.169.254 metadata.google.internal metadata
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'';
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networking.timeServers = [ "metadata.google.internal" ];
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networking.usePredictableInterfaceNames = false;
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# GC has 1460 MTU
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networking.interfaces.eth0.mtu = 1460;
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# allow the google-accounts-daemon to manage users
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users.mutableUsers = true;
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# and allow users to sudo without password
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security.sudo.enable = true;
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security.sudo.extraConfig = ''
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%google-sudoers ALL=(ALL:ALL) NOPASSWD:ALL
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'';
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# NOTE: google-accounts tries to write to /etc/sudoers.d but the folder doesn't exist
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# FIXME: not such file or directory on dynamic SSH provisioning
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systemd.services.google-accounts-daemon = {
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description = "Google Compute Engine Accounts Daemon";
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# This daemon creates dynamic users
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enable = config.users.mutableUsers;
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after = [
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"network.target"
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"google-instance-setup.service"
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"google-network-setup.service"
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];
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requires = ["network.target"];
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wantedBy = ["multi-user.target"];
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path = with pkgs; [ shadow ];
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serviceConfig = {
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Type = "simple";
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ExecStart = "${gce}/bin/google_accounts_daemon --debug";
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virtualisation.googleComputeImage.configFile = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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A path to a configuration file which will be placed at `/etc/nixos/configuration.nix`
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and be used when switching to a new configuration.
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If set to `null`, a default configuration is used, where the only import is
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`<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>`.
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'';
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};
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};
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systemd.services.google-clock-skew-daemon = {
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description = "Google Compute Engine Clock Skew Daemon";
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after = [
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"network.target"
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"google-instance-setup.service"
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"google-network-setup.service"
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];
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requires = ["network.target"];
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wantedBy = ["multi-user.target"];
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serviceConfig = {
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Type = "simple";
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ExecStart = "${gce}/bin/google_clock_skew_daemon --debug";
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#### implementation
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config = {
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system.build.googleComputeImage = import ../../lib/make-disk-image.nix {
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name = "google-compute-image";
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postVM = ''
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PATH=$PATH:${with pkgs; stdenv.lib.makeBinPath [ gnutar gzip ]}
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pushd $out
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mv $diskImage disk.raw
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tar -Szcf nixos-image-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.raw.tar.gz disk.raw
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rm $out/disk.raw
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popd
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'';
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format = "raw";
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configFile = if isNull cfg.configFile then defaultConfigFile else cfg.configFile;
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inherit (cfg) diskSize;
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inherit config lib pkgs;
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};
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};
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systemd.services.google-instance-setup = {
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description = "Google Compute Engine Instance Setup";
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after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service"];
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before = ["sshd.service"];
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wants = ["local-fs.target" "network-online.target" "network.target"];
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wantedBy = [ "sshd.service" "multi-user.target" ];
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path = with pkgs; [ ethtool openssh ];
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serviceConfig = {
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ExecStart = "${gce}/bin/google_instance_setup --debug";
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Type = "oneshot";
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};
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};
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systemd.services.google-network-daemon = {
|
||||
description = "Google Compute Engine Network Daemon";
|
||||
after = ["local-fs.target" "network-online.target" "network.target" "rsyslog.service" "google-instance-setup.service"];
|
||||
wants = ["local-fs.target" "network-online.target" "network.target"];
|
||||
requires = ["network.target"];
|
||||
partOf = ["network.target"];
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
path = with pkgs; [ iproute ];
|
||||
serviceConfig = {
|
||||
ExecStart = "${gce}/bin/google_network_daemon --debug";
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services.google-shutdown-scripts = {
|
||||
description = "Google Compute Engine Shutdown Scripts";
|
||||
after = [
|
||||
"local-fs.target"
|
||||
"network-online.target"
|
||||
"network.target"
|
||||
"rsyslog.service"
|
||||
"systemd-resolved.service"
|
||||
"google-instance-setup.service"
|
||||
"google-network-daemon.service"
|
||||
];
|
||||
wants = [ "local-fs.target" "network-online.target" "network.target"];
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
ExecStart = "${pkgs.coreutils}/bin/true";
|
||||
ExecStop = "${gce}/bin/google_metadata_script_runner --debug --script-type shutdown";
|
||||
Type = "oneshot";
|
||||
RemainAfterExit = true;
|
||||
TimeoutStopSec = "infinity";
|
||||
};
|
||||
};
|
||||
|
||||
systemd.services.google-startup-scripts = {
|
||||
description = "Google Compute Engine Startup Scripts";
|
||||
after = [
|
||||
"local-fs.target"
|
||||
"network-online.target"
|
||||
"network.target"
|
||||
"rsyslog.service"
|
||||
"google-instance-setup.service"
|
||||
"google-network-daemon.service"
|
||||
];
|
||||
wants = ["local-fs.target" "network-online.target" "network.target"];
|
||||
wantedBy = [ "multi-user.target" ];
|
||||
serviceConfig = {
|
||||
ExecStart = "${gce}/bin/google_metadata_script_runner --debug --script-type startup";
|
||||
KillMode = "process";
|
||||
Type = "oneshot";
|
||||
};
|
||||
};
|
||||
|
||||
# TODO: remove this
|
||||
systemd.services.fetch-ssh-keys =
|
||||
{ description = "Fetch host keys and authorized_keys for root user";
|
||||
|
||||
wantedBy = [ "sshd.service" ];
|
||||
before = [ "sshd.service" ];
|
||||
after = [ "network-online.target" ];
|
||||
wants = [ "network-online.target" ];
|
||||
|
||||
script = let wget = "${pkgs.wget}/bin/wget --retry-connrefused -t 15 --waitretry=10 --header='Metadata-Flavor: Google'";
|
||||
mktemp = "mktemp --tmpdir=/run"; in
|
||||
''
|
||||
# When dealing with cryptographic keys, we want to keep things private.
|
||||
umask 077
|
||||
# Don't download the SSH key if it has already been downloaded
|
||||
echo "Obtaining SSH keys..."
|
||||
mkdir -m 0700 -p /root/.ssh
|
||||
AUTH_KEYS=$(${mktemp})
|
||||
${wget} -O $AUTH_KEYS http://metadata.google.internal/computeMetadata/v1/instance/attributes/sshKeys
|
||||
if [ -s $AUTH_KEYS ]; then
|
||||
|
||||
# Read in key one by one, split in case Google decided
|
||||
# to append metadata (it does sometimes) and add to
|
||||
# authorized_keys if not already present.
|
||||
touch /root/.ssh/authorized_keys
|
||||
NEW_KEYS=$(${mktemp})
|
||||
# Yes this is a nix escape of two single quotes.
|
||||
while IFS=''' read -r line || [[ -n "$line" ]]; do
|
||||
keyLine=$(echo -n "$line" | cut -d ':' -f2)
|
||||
IFS=' ' read -r -a array <<< "$keyLine"
|
||||
if [ ''${#array[@]} -ge 3 ]; then
|
||||
echo ''${array[@]:0:3} >> $NEW_KEYS
|
||||
echo "Added ''${array[@]:2} to authorized_keys"
|
||||
fi
|
||||
done < $AUTH_KEYS
|
||||
mv $NEW_KEYS /root/.ssh/authorized_keys
|
||||
chmod 600 /root/.ssh/authorized_keys
|
||||
rm -f $KEY_PUB
|
||||
else
|
||||
echo "Downloading http://metadata.google.internal/computeMetadata/v1/project/attributes/sshKeys failed."
|
||||
false
|
||||
fi
|
||||
rm -f $AUTH_KEYS
|
||||
SSH_HOST_KEYS_DIR=$(${mktemp} -d)
|
||||
${wget} -O $SSH_HOST_KEYS_DIR/ssh_host_ed25519_key http://metadata.google.internal/computeMetadata/v1/instance/attributes/ssh_host_ed25519_key
|
||||
${wget} -O $SSH_HOST_KEYS_DIR/ssh_host_ed25519_key.pub http://metadata.google.internal/computeMetadata/v1/instance/attributes/ssh_host_ed25519_key_pub
|
||||
if [ -s $SSH_HOST_KEYS_DIR/ssh_host_ed25519_key -a -s $SSH_HOST_KEYS_DIR/ssh_host_ed25519_key.pub ]; then
|
||||
mv -f $SSH_HOST_KEYS_DIR/ssh_host_ed25519_key* /etc/ssh/
|
||||
chmod 600 /etc/ssh/ssh_host_ed25519_key
|
||||
chmod 644 /etc/ssh/ssh_host_ed25519_key.pub
|
||||
else
|
||||
echo "Setup of ssh host keys from http://metadata.google.internal/computeMetadata/v1/instance/attributes/ failed."
|
||||
false
|
||||
fi
|
||||
rm -rf $SSH_HOST_KEYS_DIR
|
||||
'';
|
||||
serviceConfig.Type = "oneshot";
|
||||
serviceConfig.RemainAfterExit = true;
|
||||
serviceConfig.StandardError = "journal+console";
|
||||
serviceConfig.StandardOutput = "journal+console";
|
||||
};
|
||||
|
||||
# Settings taken from https://github.com/GoogleCloudPlatform/compute-image-packages/blob/master/google_config/sysctl/11-gce-network-security.conf
|
||||
boot.kernel.sysctl = {
|
||||
# Turn on SYN-flood protections. Starting with 2.6.26, there is no loss
|
||||
# of TCP functionality/features under normal conditions. When flood
|
||||
# protections kick in under high unanswered-SYN load, the system
|
||||
# should remain more stable, with a trade off of some loss of TCP
|
||||
# functionality/features (e.g. TCP Window scaling).
|
||||
"net.ipv4.tcp_syncookies" = mkDefault "1";
|
||||
|
||||
# ignores source-routed packets
|
||||
"net.ipv4.conf.all.accept_source_route" = mkDefault "0";
|
||||
|
||||
# ignores source-routed packets
|
||||
"net.ipv4.conf.default.accept_source_route" = mkDefault "0";
|
||||
|
||||
# ignores ICMP redirects
|
||||
"net.ipv4.conf.all.accept_redirects" = mkDefault "0";
|
||||
|
||||
# ignores ICMP redirects
|
||||
"net.ipv4.conf.default.accept_redirects" = mkDefault "0";
|
||||
|
||||
# ignores ICMP redirects from non-GW hosts
|
||||
"net.ipv4.conf.all.secure_redirects" = mkDefault "1";
|
||||
|
||||
# ignores ICMP redirects from non-GW hosts
|
||||
"net.ipv4.conf.default.secure_redirects" = mkDefault "1";
|
||||
|
||||
# don't allow traffic between networks or act as a router
|
||||
"net.ipv4.ip_forward" = mkDefault "0";
|
||||
|
||||
# don't allow traffic between networks or act as a router
|
||||
"net.ipv4.conf.all.send_redirects" = mkDefault "0";
|
||||
|
||||
# don't allow traffic between networks or act as a router
|
||||
"net.ipv4.conf.default.send_redirects" = mkDefault "0";
|
||||
|
||||
# reverse path filtering - IP spoofing protection
|
||||
"net.ipv4.conf.all.rp_filter" = mkDefault "1";
|
||||
|
||||
# reverse path filtering - IP spoofing protection
|
||||
"net.ipv4.conf.default.rp_filter" = mkDefault "1";
|
||||
|
||||
# ignores ICMP broadcasts to avoid participating in Smurf attacks
|
||||
"net.ipv4.icmp_echo_ignore_broadcasts" = mkDefault "1";
|
||||
|
||||
# ignores bad ICMP errors
|
||||
"net.ipv4.icmp_ignore_bogus_error_responses" = mkDefault "1";
|
||||
|
||||
# logs spoofed, source-routed, and redirect packets
|
||||
"net.ipv4.conf.all.log_martians" = mkDefault "1";
|
||||
|
||||
# log spoofed, source-routed, and redirect packets
|
||||
"net.ipv4.conf.default.log_martians" = mkDefault "1";
|
||||
|
||||
# implements RFC 1337 fix
|
||||
"net.ipv4.tcp_rfc1337" = mkDefault "1";
|
||||
|
||||
# randomizes addresses of mmap base, heap, stack and VDSO page
|
||||
"kernel.randomize_va_space" = mkDefault "2";
|
||||
|
||||
# Reboot the machine soon after a kernel panic.
|
||||
"kernel.panic" = mkDefault "10";
|
||||
|
||||
## Not part of the original config
|
||||
|
||||
# provides protection from ToCToU races
|
||||
"fs.protected_hardlinks" = mkDefault "1";
|
||||
|
||||
# provides protection from ToCToU races
|
||||
"fs.protected_symlinks" = mkDefault "1";
|
||||
|
||||
# makes locating kernel addresses more difficult
|
||||
"kernel.kptr_restrict" = mkDefault "1";
|
||||
|
||||
# set ptrace protections
|
||||
"kernel.yama.ptrace_scope" = mkOverride 500 "1";
|
||||
|
||||
# set perf only available to root
|
||||
"kernel.perf_event_paranoid" = mkDefault "2";
|
||||
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue