# [可选]操作系统安全加固 https://github.com/dev-sec/ansible-os-hardening
- hosts:
  - kube-master
  - kube-node
  - etcd
  - ex-lb
  - chrony
  vars:
    os_security_users_allow: change_user
    os_auth_pam_passwdqc_enable: false
    os_security_suid_sgid_blacklist: ['/bin/umount']
    os_security_suid_sgid_whitelist: ['/usr/bin/rlogin']
    os_filesystem_whitelist: ['vfat']
    sysctl_config:
      net.ipv4.ip_forward: 1
      net.ipv6.conf.all.forwarding: 1
      net.ipv6.conf.all.accept_ra: 0
      net.ipv6.conf.default.accept_ra: 0
      net.ipv4.conf.all.rp_filter: 1
      net.ipv4.conf.default.rp_filter: 1
      net.ipv4.icmp_echo_ignore_broadcasts: 1
      net.ipv4.icmp_ignore_bogus_error_responses: 1
      net.ipv4.icmp_ratelimit: 100
      net.ipv4.icmp_ratemask: 88089
      net.ipv6.conf.all.disable_ipv6: 1
      net.ipv4.conf.all.arp_ignore: 1
      net.ipv4.conf.all.arp_announce: 2
      net.ipv4.conf.all.shared_media: 1
      net.ipv4.conf.default.shared_media: 1
      net.ipv4.conf.all.accept_source_route: 0
      net.ipv4.conf.default.accept_source_route: 0
      net.ipv4.conf.default.accept_redirects: 0
      net.ipv4.conf.all.accept_redirects: 0
      net.ipv4.conf.all.secure_redirects: 0
      net.ipv4.conf.default.secure_redirects: 0
      net.ipv6.conf.default.accept_redirects: 0
      net.ipv6.conf.all.accept_redirects: 0
      net.ipv4.conf.all.send_redirects: 0
      net.ipv4.conf.default.send_redirects: 0
      net.ipv4.conf.all.log_martians: 1
      net.ipv6.conf.default.router_solicitations: 0
      net.ipv6.conf.default.accept_ra_rtr_pref: 0
      net.ipv6.conf.default.accept_ra_pinfo: 0
      net.ipv6.conf.default.accept_ra_defrtr: 0
      net.ipv6.conf.default.autoconf: 0
      net.ipv6.conf.default.dad_transmits: 0
      net.ipv6.conf.default.max_addresses: 1
  roles:
  - os-harden 
  #- { role: os-harden, when: "OS_HARDEN is defined and OS_HARDEN == 'yes'" }