From 4fd722c4c12b441d0857c5bc29d1cd43df64b9b7 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Tue, 26 May 2020 18:08:10 +0200 Subject: finalize handling of network plugins. (needs testing) --- roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml | 7 +++++++ 1 file changed, 7 insertions(+) create mode 100644 roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml (limited to 'roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml') diff --git a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml new file mode 100644 index 00000000..0924c458 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml @@ -0,0 +1,7 @@ +--- +- name: make sure kubernetes_network_plugin_replaces_kube_proxy is not set + run_once: yes + assert: + msg: "this network plugin can not replace kube-proxy please set kubernetes_network_plugin_replaces_kube_proxy to false." + that: + - not kubernetes_network_plugin_replaces_kube_proxy -- cgit v1.2.3 From 2ecd6ff7a3390d86f40f062b177fe9babd676f22 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Sat, 20 Jun 2020 01:53:46 +0200 Subject: kubernetes: move kubeguard to kubeadm/base --- common/kubernetes-cluster.yml | 2 - .../kubeadm/base/filter_plugins/net_kubeguard.py | 33 +++++++++ .../kubeadm/base/tasks/net_kubeguard.yml | 77 +++++++++++++++++++++ .../base/templates/net_kubeguard/ifupdown.sh.j2 | 55 +++++++++++++++ .../base/templates/net_kubeguard/k8s.json.j2 | 12 ++++ .../net_kubeguard/kubeguard-interfaces.service.j2 | 12 ++++ .../net_kubeguard/kubeguard-peer.service.j2 | 37 ++++++++++ .../node/files/kubeguard-interfaces.service | 12 ---- .../net/kubeguard/node/filter_plugins/kubeguard.py | 33 --------- .../net/kubeguard/node/handlers/main.yml | 4 -- roles/kubernetes/net/kubeguard/node/tasks/main.yml | 80 ---------------------- .../net/kubeguard/node/templates/ifupdown.sh.j2 | 55 --------------- .../net/kubeguard/node/templates/k8s.json.j2 | 12 ---- .../node/templates/kubeguard-peer.service.j2 | 37 ---------- 14 files changed, 226 insertions(+), 235 deletions(-) create mode 100644 roles/kubernetes/kubeadm/base/filter_plugins/net_kubeguard.py create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 delete mode 100644 roles/kubernetes/net/kubeguard/node/files/kubeguard-interfaces.service delete mode 100644 roles/kubernetes/net/kubeguard/node/filter_plugins/kubeguard.py delete mode 100644 roles/kubernetes/net/kubeguard/node/handlers/main.yml delete mode 100644 roles/kubernetes/net/kubeguard/node/tasks/main.yml delete mode 100644 roles/kubernetes/net/kubeguard/node/templates/ifupdown.sh.j2 delete mode 100644 roles/kubernetes/net/kubeguard/node/templates/k8s.json.j2 delete mode 100644 roles/kubernetes/net/kubeguard/node/templates/kubeguard-peer.service.j2 (limited to 'roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml') diff --git a/common/kubernetes-cluster.yml b/common/kubernetes-cluster.yml index 459fd664..fe26d90d 100644 --- a/common/kubernetes-cluster.yml +++ b/common/kubernetes-cluster.yml @@ -36,8 +36,6 @@ - name: kubernetes base installation hosts: _kubernetes_nodes_ roles: - - role: kubernetes/net/kubeguard/node - when: kubernetes_network_plugin == 'kubeguard' - role: kubernetes/base - role: kubernetes/kubeadm/base diff --git a/roles/kubernetes/kubeadm/base/filter_plugins/net_kubeguard.py b/roles/kubernetes/kubeadm/base/filter_plugins/net_kubeguard.py new file mode 100644 index 00000000..2220e545 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/filter_plugins/net_kubeguard.py @@ -0,0 +1,33 @@ +from __future__ import (absolute_import, division, print_function) +__metaclass__ = type + +from ansible import errors + + +def kubeguard_direct_net_zone(data, myname, peer): + try: + zones = [] + for zone in data: + if myname in data[zone]['node_interface'] and peer in data[zone]['node_interface']: + zones.append(zone) + + if not zones: + return "" + if len(zones) > 1: + raise errors.AnsibleFilterError("host '%s' and '%s' have multiple direct net zones in common: %s" % + (myname, peer, zones.join(','))) + return zones[0] + + except Exception as e: + raise errors.AnsibleFilterError("kubeguard_direct_net_zones(): %s" % str(e)) + + +class FilterModule(object): + + ''' Kubeguard Network Filters ''' + filter_map = { + 'kubeguard_direct_net_zone': kubeguard_direct_net_zone, + } + + def filters(self): + return self.filter_map diff --git a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml index 0924c458..8c5f5065 100644 --- a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml +++ b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml @@ -5,3 +5,80 @@ msg: "this network plugin can not replace kube-proxy please set kubernetes_network_plugin_replaces_kube_proxy to false." that: - not kubernetes_network_plugin_replaces_kube_proxy + + +- name: install wireguard + import_role: + name: wireguard/base + +- name: create network config directory + file: + name: /var/lib/kubeguard/ + state: directory + +- name: install ifupdown script + template: + src: net_kubeguard/ifupdown.sh.j2 + dest: /var/lib/kubeguard/ifupdown.sh + mode: 0755 + # TODO: notify reload... this is unfortunately already to late because + # it must probably be brought down by the old version of the script + +- name: generate wireguard private key + shell: "umask 077; wg genkey > /var/lib/kubeguard/kube-wg0.privatekey" + args: + creates: /var/lib/kubeguard/kube-wg0.privatekey + +- name: fetch wireguard public key + shell: "wg pubkey < /var/lib/kubeguard/kube-wg0.privatekey" + register: kubeguard_wireguard_pubkey + changed_when: false + check_mode: no + +- name: install systemd service unit for network interfaces + template: + src: net_kubeguard/kubeguard-interfaces.service.j2 + dest: /etc/systemd/system/kubeguard-interfaces.service + # TODO: notify: reload??? + +- name: make sure kubeguard interfaces service is started and enabled + systemd: + daemon_reload: yes + name: kubeguard-interfaces.service + state: started + enabled: yes + +- name: install systemd units for every kubeguard peer + loop: "{{ groups['_kubernetes_nodes_'] | difference(inventory_hostname) }}" + loop_control: + loop_var: peer + template: + src: net_kubeguard/kubeguard-peer.service.j2 + dest: "/etc/systemd/system/kubeguard-peer-{{ peer }}.service" + # TODO: notify restart for peers that change... + +- name: make sure kubeguard peer services are started and enabled + loop: "{{ groups['_kubernetes_nodes_'] | difference(inventory_hostname) }}" + systemd: + daemon_reload: yes + name: "kubeguard-peer-{{ item }}.service" + state: started + enabled: yes + +- name: enable IPv4 forwarding + sysctl: + name: net.ipv4.ip_forward + value: '1' + sysctl_set: yes + state: present + reload: yes + +- name: create cni config directory + file: + name: /etc/cni/net.d + state: directory + +- name: install cni config + template: + src: net_kubeguard/k8s.json.j2 + dest: /etc/cni/net.d/kubeguard.json diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 new file mode 100644 index 00000000..d8153102 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 @@ -0,0 +1,55 @@ +#!/bin/bash + +set -e + +CONF_D="/var/lib/kubeguard/" + +INET_IF="{{ ansible_default_ipv4.interface }}" + +POD_NET_CIDR="{{ kubernetes.pod_ip_range }}" + +{% set br_net = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) -%} +BR_IF="kube-br0" +BR_IP="{{ br_net | ipaddr(1) | ipaddr('address') }}" +BR_IP_CIDR="{{ br_net | ipaddr(1) }}" +BR_NET_CIDR="{{ br_net }}" + +TUN_IF="kube-wg0" +TUN_IP_CIDR="{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[inventory_hostname]) }}" + + +case "$1" in + up) + # bring up bridge for local pods + ip link add dev "$BR_IF" type bridge + ip addr add dev "$BR_IF" "$BR_IP_CIDR" + ip link set up dev "$BR_IF" + iptables -t nat -A POSTROUTING -s "$BR_NET_CIDR" -o "$INET_IF" -j MASQUERADE + modprobe br_netfilter + + # bring up wireguard tunnel to other nodes + ip link add dev "$TUN_IF" type wireguard + ip addr add dev "$TUN_IF" "$TUN_IP_CIDR" + wg set "$TUN_IF" listen-port {{ kubeguard_wireguard_port | default(51820) }} private-key "$CONF_D/$TUN_IF.privatekey" + ip link set up dev "$TUN_IF" + + # make pods and service IPs reachable + # !!! use IP of bridge as source so we don't produce martians if direct-zones are involved!!! + ip route add "$POD_NET_CIDR" dev "$TUN_IF" src "$BR_IP" + ;; + down) + # bring down wireguard tunnel to other nodes + ip route del "$POD_NET_CIDR" dev "$TUN_IF" + ip link del dev "$TUN_IF" + + # bring down bridge for local pods + iptables -t nat -D POSTROUTING -s "$BR_NET_CIDR" -o "$INET_IF" -j MASQUERADE + ip link del dev "$BR_IF" + ;; + *) + echo "usage: $0 (up|down)" + exit 1 + ;; +esac + +exit 0 diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 new file mode 100644 index 00000000..65b1357a --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 @@ -0,0 +1,12 @@ +{ + "cniVersion": "0.3.1", + "name": "k8s", + "type": "bridge", + "bridge": "kube-br0", + "isDefaultGateway": true, + "hairpinMode": true, + "ipam": { + "type": "host-local", + "subnet": "{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) }}" + } +} diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 new file mode 100644 index 00000000..35fc8f90 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 @@ -0,0 +1,12 @@ +[Unit] +Description=Kubeguard Network Setup +After=network.target + +[Service] +Type=oneshot +ExecStart=/var/lib/kubeguard/ifupdown.sh up +ExecStop=/var/lib/kubeguard/ifupdown.sh down +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 new file mode 100644 index 00000000..92300253 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 @@ -0,0 +1,37 @@ +[Unit] +Description=Kubernetes Network Peer {{ peer }} +After=network.target +Requires=kubeguard-interfaces.service +After=kubeguard-interfaces.service + +{% set pod_ip_self = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) | ipaddr(1) | ipaddr('address') -%} +{% set pod_net_peer = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[peer]) -%} +{% set direct_zone = kubeguard.direct_net_zones | default({}) | kubeguard_direct_net_zone(inventory_hostname, peer) -%} +{% if direct_zone %} +{% set direct_ip = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[inventory_hostname]) %} +{% set direct_interface = kubeguard.direct_net_zones[direct_zone].node_interface[inventory_hostname] %} +{% set direct_ip_peer = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[peer]) %} +{% else %} +{% set tun_ip = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[peer]) -%} +{% set wg_pubkey = hostvars[peer].kubeguard_wireguard_pubkey.stdout -%} +{% set wg_host = hostvars[peer].external_ip_cooked | default(hostvars[peer].ansible_default_ipv4.address) -%} +{% set wg_port = hostvars[peer].kubeguard_wireguard_port | default(51820) -%} +{% set wg_allowedips = (tun_ip | ipaddr('address')) + "/32," + pod_net_peer %} +{% endif %} +[Service] +Type=oneshot +{% if direct_zone %} +ExecStart=/sbin/ip addr add {{ direct_ip }} dev {{ direct_interface }} +ExecStart=/sbin/ip link set up dev {{ direct_interface }} +ExecStart=/sbin/ip route add {{ pod_net_peer }} via {{ direct_ip_peer | ipaddr('address') }} src {{ pod_ip_self }} +ExecStop=/sbin/ip route del {{ pod_net_peer }} +ExecStop=/sbin/ip link set down dev {{ direct_interface }} +ExecStop=/sbin/ip addr del {{ direct_ip }} dev {{ direct_interface }} +{% else %} +ExecStart=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} allowed-ips {{ wg_allowedips }} endpoint {{ wg_host }}:{{ wg_port }} persistent-keepalive 10 +ExecStop=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} remove +{% endif %} +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target diff --git a/roles/kubernetes/net/kubeguard/node/files/kubeguard-interfaces.service b/roles/kubernetes/net/kubeguard/node/files/kubeguard-interfaces.service deleted file mode 100644 index 35fc8f90..00000000 --- a/roles/kubernetes/net/kubeguard/node/files/kubeguard-interfaces.service +++ /dev/null @@ -1,12 +0,0 @@ -[Unit] -Description=Kubeguard Network Setup -After=network.target - -[Service] -Type=oneshot -ExecStart=/var/lib/kubeguard/ifupdown.sh up -ExecStop=/var/lib/kubeguard/ifupdown.sh down -RemainAfterExit=yes - -[Install] -WantedBy=multi-user.target diff --git a/roles/kubernetes/net/kubeguard/node/filter_plugins/kubeguard.py b/roles/kubernetes/net/kubeguard/node/filter_plugins/kubeguard.py deleted file mode 100644 index 199ff14b..00000000 --- a/roles/kubernetes/net/kubeguard/node/filter_plugins/kubeguard.py +++ /dev/null @@ -1,33 +0,0 @@ -from __future__ import (absolute_import, division, print_function) -__metaclass__ = type - -from ansible import errors - - -def direct_net_zone(data, myname, peer): - try: - zones = [] - for zone in data: - if myname in data[zone]['node_interface'] and peer in data[zone]['node_interface']: - zones.append(zone) - - if not zones: - return "" - if len(zones) > 1: - raise errors.AnsibleFilterError("host '%s' and '%s' have multiple direct net zones in common: %s" % - (myname, peer, zones.join(','))) - return zones[0] - - except Exception as e: - raise errors.AnsibleFilterError("direct_net_zones(): %s" % str(e)) - - -class FilterModule(object): - - ''' Kubeguard Network Filters ''' - filter_map = { - 'direct_net_zone': direct_net_zone, - } - - def filters(self): - return self.filter_map diff --git a/roles/kubernetes/net/kubeguard/node/handlers/main.yml b/roles/kubernetes/net/kubeguard/node/handlers/main.yml deleted file mode 100644 index bb7fde2b..00000000 --- a/roles/kubernetes/net/kubeguard/node/handlers/main.yml +++ /dev/null @@ -1,4 +0,0 @@ ---- -- name: reload systemd - systemd: - daemon_reload: yes diff --git a/roles/kubernetes/net/kubeguard/node/tasks/main.yml b/roles/kubernetes/net/kubeguard/node/tasks/main.yml deleted file mode 100644 index 72814e06..00000000 --- a/roles/kubernetes/net/kubeguard/node/tasks/main.yml +++ /dev/null @@ -1,80 +0,0 @@ ---- -- name: install wireguard - import_role: - name: wireguard/base - -- name: create network config directory - file: - name: /var/lib/kubeguard/ - state: directory - -- name: configure wireguard port - set_fact: - kubeguard_wireguard_port: "{{ kubernetes.wireguard_port | default(51820) }}" - -- name: install ifupdown script - template: - src: ifupdown.sh.j2 - dest: /var/lib/kubeguard/ifupdown.sh - mode: 0755 - # TODO: notify reload... this is unfortunately already to late because - # it must probably be brought down by the old version of the script - -- name: generate wireguard private key - shell: "umask 077; wg genkey > /var/lib/kubeguard/kube-wg0.privatekey" - args: - creates: /var/lib/kubeguard/kube-wg0.privatekey - -- name: fetch wireguard public key - shell: "wg pubkey < /var/lib/kubeguard/kube-wg0.privatekey" - register: kubeguard_wireguard_pubkey - changed_when: false - check_mode: no - -- name: install systemd service unit for network interfaces - copy: - src: kubeguard-interfaces.service - dest: /etc/systemd/system/kubeguard-interfaces.service - # TODO: notify: reload??? - -- name: make sure kubeguard interfaces service is started and enabled - systemd: - daemon_reload: yes - name: kubeguard-interfaces.service - state: started - enabled: yes - -- name: install systemd units for every kubeguard peer - loop: "{{ groups['_kubernetes_nodes_'] | difference(inventory_hostname) }}" - loop_control: - loop_var: peer - template: - src: kubeguard-peer.service.j2 - dest: "/etc/systemd/system/kubeguard-peer-{{ peer }}.service" - # TODO: notify restart for peers that change... - -- name: make sure kubeguard peer services are started and enabled - loop: "{{ groups['_kubernetes_nodes_'] | difference(inventory_hostname) }}" - systemd: - daemon_reload: yes - name: "kubeguard-peer-{{ item }}.service" - state: started - enabled: yes - -- name: enable IPv4 forwarding - sysctl: - name: net.ipv4.ip_forward - value: '1' - sysctl_set: yes - state: present - reload: yes - -- name: create cni config directory - file: - name: /etc/cni/net.d - state: directory - -- name: install cni config - template: - src: k8s.json.j2 - dest: /etc/cni/net.d/k8s.json diff --git a/roles/kubernetes/net/kubeguard/node/templates/ifupdown.sh.j2 b/roles/kubernetes/net/kubeguard/node/templates/ifupdown.sh.j2 deleted file mode 100644 index 98b38cf4..00000000 --- a/roles/kubernetes/net/kubeguard/node/templates/ifupdown.sh.j2 +++ /dev/null @@ -1,55 +0,0 @@ -#!/bin/bash - -set -e - -CONF_D="/var/lib/kubeguard/" - -INET_IF="{{ ansible_default_ipv4.interface }}" - -POD_NET_CIDR="{{ kubernetes.pod_ip_range }}" - -{% set br_net = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) -%} -BR_IF="kube-br0" -BR_IP="{{ br_net | ipaddr(1) | ipaddr('address') }}" -BR_IP_CIDR="{{ br_net | ipaddr(1) }}" -BR_NET_CIDR="{{ br_net }}" - -TUN_IF="kube-wg0" -TUN_IP_CIDR="{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[inventory_hostname]) }}" - - -case "$1" in - up) - # bring up bridge for local pods - ip link add dev "$BR_IF" type bridge - ip addr add dev "$BR_IF" "$BR_IP_CIDR" - ip link set up dev "$BR_IF" - iptables -t nat -A POSTROUTING -s "$BR_NET_CIDR" -o "$INET_IF" -j MASQUERADE - modprobe br_netfilter - - # bring up wireguard tunnel to other nodes - ip link add dev "$TUN_IF" type wireguard - ip addr add dev "$TUN_IF" "$TUN_IP_CIDR" - wg set "$TUN_IF" listen-port {{ kubeguard_wireguard_port }} private-key "$CONF_D/$TUN_IF.privatekey" - ip link set up dev "$TUN_IF" - - # make pods and service IPs reachable - # !!! use IP of bridge as source so we don't produce martians if direct-zones are involved!!! - ip route add "$POD_NET_CIDR" dev "$TUN_IF" src "$BR_IP" - ;; - down) - # bring down wireguard tunnel to other nodes - ip route del "$POD_NET_CIDR" dev "$TUN_IF" - ip link del dev "$TUN_IF" - - # bring down bridge for local pods - iptables -t nat -D POSTROUTING -s "$BR_NET_CIDR" -o "$INET_IF" -j MASQUERADE - ip link del dev "$BR_IF" - ;; - *) - echo "usage: $0 (up|down)" - exit 1 - ;; -esac - -exit 0 diff --git a/roles/kubernetes/net/kubeguard/node/templates/k8s.json.j2 b/roles/kubernetes/net/kubeguard/node/templates/k8s.json.j2 deleted file mode 100644 index 65b1357a..00000000 --- a/roles/kubernetes/net/kubeguard/node/templates/k8s.json.j2 +++ /dev/null @@ -1,12 +0,0 @@ -{ - "cniVersion": "0.3.1", - "name": "k8s", - "type": "bridge", - "bridge": "kube-br0", - "isDefaultGateway": true, - "hairpinMode": true, - "ipam": { - "type": "host-local", - "subnet": "{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) }}" - } -} diff --git a/roles/kubernetes/net/kubeguard/node/templates/kubeguard-peer.service.j2 b/roles/kubernetes/net/kubeguard/node/templates/kubeguard-peer.service.j2 deleted file mode 100644 index 0503ca03..00000000 --- a/roles/kubernetes/net/kubeguard/node/templates/kubeguard-peer.service.j2 +++ /dev/null @@ -1,37 +0,0 @@ -[Unit] -Description=Kubernetes Network Peer {{ peer }} -After=network.target -Requires=kubeguard-interfaces.service -After=kubeguard-interfaces.service - -{% set pod_ip_self = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) | ipaddr(1) | ipaddr('address') -%} -{% set pod_net_peer = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[peer]) -%} -{% set direct_zone = kubeguard.direct_net_zones | default({}) | direct_net_zone(inventory_hostname, peer) -%} -{% if direct_zone %} -{% set direct_ip = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[inventory_hostname]) %} -{% set direct_interface = kubeguard.direct_net_zones[direct_zone].node_interface[inventory_hostname] %} -{% set direct_ip_peer = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[peer]) %} -{% else %} -{% set tun_ip = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[peer]) -%} -{% set wg_pubkey = hostvars[peer].kubeguard_wireguard_pubkey.stdout -%} -{% set wg_host = hostvars[peer].external_ip_cooked | default(hostvars[peer].ansible_default_ipv4.address) -%} -{% set wg_port = hostvars[peer].kubeguard_wireguard_port -%} -{% set wg_allowedips = (tun_ip | ipaddr('address')) + "/32," + pod_net_peer %} -{% endif %} -[Service] -Type=oneshot -{% if direct_zone %} -ExecStart=/sbin/ip addr add {{ direct_ip }} dev {{ direct_interface }} -ExecStart=/sbin/ip link set up dev {{ direct_interface }} -ExecStart=/sbin/ip route add {{ pod_net_peer }} via {{ direct_ip_peer | ipaddr('address') }} src {{ pod_ip_self }} -ExecStop=/sbin/ip route del {{ pod_net_peer }} -ExecStop=/sbin/ip link set down dev {{ direct_interface }} -ExecStop=/sbin/ip addr del {{ direct_ip }} dev {{ direct_interface }} -{% else %} -ExecStart=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} allowed-ips {{ wg_allowedips }} endpoint {{ wg_host }}:{{ wg_port }} persistent-keepalive 10 -ExecStop=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} remove -{% endif %} -RemainAfterExit=yes - -[Install] -WantedBy=multi-user.target -- cgit v1.2.3 From b39c3b91269a8482207863234acc298f623deae6 Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Sat, 20 Jun 2020 05:20:46 +0200 Subject: kubernetes: add node pruning role --- common/kubernetes-cluster-cleanup.yml | 21 ++++-------- .../kubeadm/base/tasks/net_kubeguard.yml | 20 ++++++------ .../base/templates/net_kubeguard/cni.json.j2 | 12 +++++++ .../base/templates/net_kubeguard/ifupdown.sh.j2 | 4 +-- .../templates/net_kubeguard/interface.service.j2 | 12 +++++++ .../base/templates/net_kubeguard/k8s.json.j2 | 12 ------- .../net_kubeguard/kubeguard-interfaces.service.j2 | 12 ------- .../net_kubeguard/kubeguard-peer.service.j2 | 37 ---------------------- .../base/templates/net_kubeguard/peer.service.j2 | 37 ++++++++++++++++++++++ roles/kubernetes/kubeadm/prune/tasks/main.yml | 9 ++++++ .../kubeadm/prune/tasks/net_kubeguard.yml | 14 ++++++++ roles/kubernetes/kubeadm/prune/tasks/net_none.yml | 2 ++ .../kubeadm/reset/tasks/net_kubeguard.yml | 6 ++-- .../net/kubeguard/cleanup/tasks/main.yml | 14 -------- 14 files changed, 107 insertions(+), 105 deletions(-) create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/cni.json.j2 create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/interface.service.j2 delete mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 delete mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 delete mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 create mode 100644 roles/kubernetes/kubeadm/base/templates/net_kubeguard/peer.service.j2 create mode 100644 roles/kubernetes/kubeadm/prune/tasks/main.yml create mode 100644 roles/kubernetes/kubeadm/prune/tasks/net_kubeguard.yml create mode 100644 roles/kubernetes/kubeadm/prune/tasks/net_none.yml delete mode 100644 roles/kubernetes/net/kubeguard/cleanup/tasks/main.yml (limited to 'roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml') diff --git a/common/kubernetes-cluster-cleanup.yml b/common/kubernetes-cluster-cleanup.yml index 7c10d17c..5647e3d6 100644 --- a/common/kubernetes-cluster-cleanup.yml +++ b/common/kubernetes-cluster-cleanup.yml @@ -13,28 +13,19 @@ add_host: name: "{{ item }}" inventory_dir: "{{ hostvars[item].inventory_dir }}" - group: _kubernetes_nodes_remove_ + group: _kubernetes_nodes_prune_ changed_when: False - name: drain superflous nodes - loop: "{{ groups['_kubernetes_nodes_remove_'] | default([]) }}" + loop: "{{ groups['_kubernetes_nodes_prune_'] | default([]) }}" command: "kubectl drain {{ item }} --delete-local-data --force --ignore-daemonsets" - -- name: remove nodes from api server - hosts: _kubernetes_primary_master_ - tasks: - - name: remove superflous nodes - loop: "{{ groups['_kubernetes_nodes_remove_'] | default([]) }}" - command: "kubectl delete node {{ item }}" - -- name: cleanup kubeguard connections +- name: prune superflous nodes from cluster hosts: _kubernetes_nodes_ roles: - - role: kubernetes/net/kubeguard/cleanup - when: hostvars[groups['_kubernetes_primary_master_'][0]].kubernetes_network_plugin == 'kubeguard' + - role: kubernetes/kubeadm/prune -- name: try to clean superflous nodes - hosts: _kubernetes_nodes_remove_ +- name: wipe superflous nodes + hosts: _kubernetes_nodes_prune_ roles: - role: kubernetes/kubeadm/reset diff --git a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml index 8c5f5065..37b5030d 100644 --- a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml +++ b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml @@ -25,26 +25,26 @@ # it must probably be brought down by the old version of the script - name: generate wireguard private key - shell: "umask 077; wg genkey > /var/lib/kubeguard/kube-wg0.privatekey" + shell: "umask 077; wg genkey > /var/lib/kubeguard/kubeguard-wg0.privatekey" args: - creates: /var/lib/kubeguard/kube-wg0.privatekey + creates: /var/lib/kubeguard/kubeguard-wg0.privatekey - name: fetch wireguard public key - shell: "wg pubkey < /var/lib/kubeguard/kube-wg0.privatekey" + shell: "wg pubkey < /var/lib/kubeguard/kubeguard-wg0.privatekey" register: kubeguard_wireguard_pubkey changed_when: false check_mode: no -- name: install systemd service unit for network interfaces +- name: install systemd service unit for network interface template: - src: net_kubeguard/kubeguard-interfaces.service.j2 - dest: /etc/systemd/system/kubeguard-interfaces.service + src: net_kubeguard/interface.service.j2 + dest: /etc/systemd/system/kubeguard-interface.service # TODO: notify: reload??? -- name: make sure kubeguard interfaces service is started and enabled +- name: make sure kubeguard interface service is started and enabled systemd: daemon_reload: yes - name: kubeguard-interfaces.service + name: kubeguard-interface.service state: started enabled: yes @@ -53,7 +53,7 @@ loop_control: loop_var: peer template: - src: net_kubeguard/kubeguard-peer.service.j2 + src: net_kubeguard/peer.service.j2 dest: "/etc/systemd/system/kubeguard-peer-{{ peer }}.service" # TODO: notify restart for peers that change... @@ -80,5 +80,5 @@ - name: install cni config template: - src: net_kubeguard/k8s.json.j2 + src: net_kubeguard/cni.json.j2 dest: /etc/cni/net.d/kubeguard.json diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/cni.json.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/cni.json.j2 new file mode 100644 index 00000000..eb9e3d61 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/cni.json.j2 @@ -0,0 +1,12 @@ +{ + "cniVersion": "0.3.1", + "name": "kubeguard", + "type": "bridge", + "bridge": "kubeguard-br0", + "isDefaultGateway": true, + "hairpinMode": true, + "ipam": { + "type": "host-local", + "subnet": "{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) }}" + } +} diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 index d8153102..f940d413 100644 --- a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/ifupdown.sh.j2 @@ -9,12 +9,12 @@ INET_IF="{{ ansible_default_ipv4.interface }}" POD_NET_CIDR="{{ kubernetes.pod_ip_range }}" {% set br_net = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) -%} -BR_IF="kube-br0" +BR_IF="kubeguard-br0" BR_IP="{{ br_net | ipaddr(1) | ipaddr('address') }}" BR_IP_CIDR="{{ br_net | ipaddr(1) }}" BR_NET_CIDR="{{ br_net }}" -TUN_IF="kube-wg0" +TUN_IF="kubeguard-wg0" TUN_IP_CIDR="{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[inventory_hostname]) }}" diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/interface.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/interface.service.j2 new file mode 100644 index 00000000..35fc8f90 --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/interface.service.j2 @@ -0,0 +1,12 @@ +[Unit] +Description=Kubeguard Network Setup +After=network.target + +[Service] +Type=oneshot +ExecStart=/var/lib/kubeguard/ifupdown.sh up +ExecStop=/var/lib/kubeguard/ifupdown.sh down +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 deleted file mode 100644 index 65b1357a..00000000 --- a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/k8s.json.j2 +++ /dev/null @@ -1,12 +0,0 @@ -{ - "cniVersion": "0.3.1", - "name": "k8s", - "type": "bridge", - "bridge": "kube-br0", - "isDefaultGateway": true, - "hairpinMode": true, - "ipam": { - "type": "host-local", - "subnet": "{{ kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) }}" - } -} diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 deleted file mode 100644 index 35fc8f90..00000000 --- a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-interfaces.service.j2 +++ /dev/null @@ -1,12 +0,0 @@ -[Unit] -Description=Kubeguard Network Setup -After=network.target - -[Service] -Type=oneshot -ExecStart=/var/lib/kubeguard/ifupdown.sh up -ExecStop=/var/lib/kubeguard/ifupdown.sh down -RemainAfterExit=yes - -[Install] -WantedBy=multi-user.target diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 deleted file mode 100644 index 92300253..00000000 --- a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/kubeguard-peer.service.j2 +++ /dev/null @@ -1,37 +0,0 @@ -[Unit] -Description=Kubernetes Network Peer {{ peer }} -After=network.target -Requires=kubeguard-interfaces.service -After=kubeguard-interfaces.service - -{% set pod_ip_self = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) | ipaddr(1) | ipaddr('address') -%} -{% set pod_net_peer = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[peer]) -%} -{% set direct_zone = kubeguard.direct_net_zones | default({}) | kubeguard_direct_net_zone(inventory_hostname, peer) -%} -{% if direct_zone %} -{% set direct_ip = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[inventory_hostname]) %} -{% set direct_interface = kubeguard.direct_net_zones[direct_zone].node_interface[inventory_hostname] %} -{% set direct_ip_peer = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[peer]) %} -{% else %} -{% set tun_ip = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[peer]) -%} -{% set wg_pubkey = hostvars[peer].kubeguard_wireguard_pubkey.stdout -%} -{% set wg_host = hostvars[peer].external_ip_cooked | default(hostvars[peer].ansible_default_ipv4.address) -%} -{% set wg_port = hostvars[peer].kubeguard_wireguard_port | default(51820) -%} -{% set wg_allowedips = (tun_ip | ipaddr('address')) + "/32," + pod_net_peer %} -{% endif %} -[Service] -Type=oneshot -{% if direct_zone %} -ExecStart=/sbin/ip addr add {{ direct_ip }} dev {{ direct_interface }} -ExecStart=/sbin/ip link set up dev {{ direct_interface }} -ExecStart=/sbin/ip route add {{ pod_net_peer }} via {{ direct_ip_peer | ipaddr('address') }} src {{ pod_ip_self }} -ExecStop=/sbin/ip route del {{ pod_net_peer }} -ExecStop=/sbin/ip link set down dev {{ direct_interface }} -ExecStop=/sbin/ip addr del {{ direct_ip }} dev {{ direct_interface }} -{% else %} -ExecStart=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} allowed-ips {{ wg_allowedips }} endpoint {{ wg_host }}:{{ wg_port }} persistent-keepalive 10 -ExecStop=/usr/bin/wg set kube-wg0 peer {{ wg_pubkey }} remove -{% endif %} -RemainAfterExit=yes - -[Install] -WantedBy=multi-user.target diff --git a/roles/kubernetes/kubeadm/base/templates/net_kubeguard/peer.service.j2 b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/peer.service.j2 new file mode 100644 index 00000000..c9d96a5a --- /dev/null +++ b/roles/kubernetes/kubeadm/base/templates/net_kubeguard/peer.service.j2 @@ -0,0 +1,37 @@ +[Unit] +Description=Kubernetes Network Peer {{ peer }} +After=network.target +Requires=kubeguard-interface.service +After=kubeguard-interface.service + +{% set pod_ip_self = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[inventory_hostname]) | ipaddr(1) | ipaddr('address') -%} +{% set pod_net_peer = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubeguard.node_index[peer]) -%} +{% set direct_zone = kubeguard.direct_net_zones | default({}) | kubeguard_direct_net_zone(inventory_hostname, peer) -%} +{% if direct_zone %} +{% set direct_ip = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[inventory_hostname]) %} +{% set direct_interface = kubeguard.direct_net_zones[direct_zone].node_interface[inventory_hostname] %} +{% set direct_ip_peer = kubeguard.direct_net_zones[direct_zone].transfer_net | ipaddr(kubeguard.node_index[peer]) %} +{% else %} +{% set tun_ip = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubeguard.node_index[peer]) -%} +{% set wg_pubkey = hostvars[peer].kubeguard_wireguard_pubkey.stdout -%} +{% set wg_host = hostvars[peer].external_ip_cooked | default(hostvars[peer].ansible_default_ipv4.address) -%} +{% set wg_port = hostvars[peer].kubeguard_wireguard_port | default(51820) -%} +{% set wg_allowedips = (tun_ip | ipaddr('address')) + "/32," + pod_net_peer %} +{% endif %} +[Service] +Type=oneshot +{% if direct_zone %} +ExecStart=/sbin/ip addr add {{ direct_ip }} dev {{ direct_interface }} +ExecStart=/sbin/ip link set up dev {{ direct_interface }} +ExecStart=/sbin/ip route add {{ pod_net_peer }} via {{ direct_ip_peer | ipaddr('address') }} src {{ pod_ip_self }} +ExecStop=/sbin/ip route del {{ pod_net_peer }} +ExecStop=/sbin/ip link set down dev {{ direct_interface }} +ExecStop=/sbin/ip addr del {{ direct_ip }} dev {{ direct_interface }} +{% else %} +ExecStart=/usr/bin/wg set kubeguard-wg0 peer {{ wg_pubkey }} allowed-ips {{ wg_allowedips }} endpoint {{ wg_host }}:{{ wg_port }} persistent-keepalive 10 +ExecStop=/usr/bin/wg set kubeguard-wg0 peer {{ wg_pubkey }} remove +{% endif %} +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target diff --git a/roles/kubernetes/kubeadm/prune/tasks/main.yml b/roles/kubernetes/kubeadm/prune/tasks/main.yml new file mode 100644 index 00000000..71ed0d04 --- /dev/null +++ b/roles/kubernetes/kubeadm/prune/tasks/main.yml @@ -0,0 +1,9 @@ +--- +- name: remove nodes from api server + run_once: true + delegate_to: "{{ groups['_kubernetes_primary_master_'] | first }}" + loop: "{{ groups['_kubernetes_nodes_prune_'] | default([]) }}" + command: "kubectl delete node {{ item }}" + +- name: prune network plugin + include_tasks: "net_{{ kubernetes_network_plugin }}.yml" diff --git a/roles/kubernetes/kubeadm/prune/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/prune/tasks/net_kubeguard.yml new file mode 100644 index 00000000..8a8c7752 --- /dev/null +++ b/roles/kubernetes/kubeadm/prune/tasks/net_kubeguard.yml @@ -0,0 +1,14 @@ +--- +- name: stop/disable systemd units for stale kubeguard peers + loop: "{{ groups['_kubernetes_nodes_prune_'] | default([]) }}" + systemd: + name: "kubeguard-peer-{{ item }}.service" + state: stopped + enabled: no + failed_when: false + +- name: remove systemd units for stale kubeguard peers + loop: "{{ groups['_kubernetes_nodes_prune_'] | default([]) }}" + file: + name: "/etc/systemd/system/kubeguard-peer-{{ item }}.service" + state: absent diff --git a/roles/kubernetes/kubeadm/prune/tasks/net_none.yml b/roles/kubernetes/kubeadm/prune/tasks/net_none.yml new file mode 100644 index 00000000..94832c38 --- /dev/null +++ b/roles/kubernetes/kubeadm/prune/tasks/net_none.yml @@ -0,0 +1,2 @@ +--- +## nothing to do here diff --git a/roles/kubernetes/kubeadm/reset/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/reset/tasks/net_kubeguard.yml index 03b3f205..bcb48960 100644 --- a/roles/kubernetes/kubeadm/reset/tasks/net_kubeguard.yml +++ b/roles/kubernetes/kubeadm/reset/tasks/net_kubeguard.yml @@ -1,13 +1,13 @@ --- - name: check if kubeguard interface service unit exists stat: - path: /etc/systemd/system/kubeguard-interfaces.service + path: /etc/systemd/system/kubeguard-interface.service register: kubeguard_interface_unit - name: bring down kubeguard interface when: kubeguard_interface_unit.stat.exists systemd: - name: kubeguard-interfaces.service + name: kubeguard-interface.service state: stopped - name: gather list of all kubeguard related service units @@ -15,7 +15,7 @@ path: /etc/systemd/system/ patterns: - "kubeguard-peer-*.service" - - kubeguard-interfaces.service + - kubeguard-interface.service register: kubeguard_units_installed - name: remove all kubeguard related files and directories diff --git a/roles/kubernetes/net/kubeguard/cleanup/tasks/main.yml b/roles/kubernetes/net/kubeguard/cleanup/tasks/main.yml deleted file mode 100644 index f15058d2..00000000 --- a/roles/kubernetes/net/kubeguard/cleanup/tasks/main.yml +++ /dev/null @@ -1,14 +0,0 @@ ---- -- name: stop/disable systemd units for stale kubeguard peers - loop: "{{ groups['_kubernetes_nodes_remove_'] | default([]) }}" - systemd: - name: "kubeguard-peer-{{ item }}.service" - state: stopped - enabled: no - failed_when: false - -- name: remove systemd units for stale kubeguard peers - loop: "{{ groups['_kubernetes_nodes_remove_'] | default([]) }}" - file: - name: "/etc/systemd/system/kubeguard-peer-{{ item }}.service" - state: absent -- cgit v1.2.3 From c2d634aaba07caa564056693bc5454f1582426ea Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Sat, 20 Jun 2020 17:23:44 +0200 Subject: kubeguard: add kube-router variant --- inventory/group_vars/k8s-chtest/main.yml | 3 + inventory/group_vars/kubernetes-cluster/vars.yml | 1 + .../kubeadm/base/tasks/net_kubeguard.yml | 13 +- .../kubeadm/master/tasks/net_kubeguard.yml | 14 +- .../net_kubeguard/kube-router.0.4.0.yml.j2 | 171 +++++++++++++++++++++ 5 files changed, 199 insertions(+), 3 deletions(-) create mode 100644 roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2 (limited to 'roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml') diff --git a/inventory/group_vars/k8s-chtest/main.yml b/inventory/group_vars/k8s-chtest/main.yml index 2e5d56d3..a7fe0120 100644 --- a/inventory/group_vars/k8s-chtest/main.yml +++ b/inventory/group_vars/k8s-chtest/main.yml @@ -5,6 +5,9 @@ docker_pkg_name: docker-ce kubernetes_version: 1.18.3 kubernetes_container_runtime: docker kubernetes_network_plugin: kubeguard +kubernetes_network_plugin_replaces_kube_proxy: true +kubernetes_network_plugin_variant: with-kube-router +kubernetes_network_plugin_version: 0.4.0 kubernetes: cluster_name: chtest diff --git a/inventory/group_vars/kubernetes-cluster/vars.yml b/inventory/group_vars/kubernetes-cluster/vars.yml index 2d7a696f..edec4e3e 100644 --- a/inventory/group_vars/kubernetes-cluster/vars.yml +++ b/inventory/group_vars/kubernetes-cluster/vars.yml @@ -1,4 +1,5 @@ --- kubernetes_network_plugin_replaces_kube_proxy: false +kubernetes_network_plugin_variant: default kubernetes_nodelocal_dnscache_ip: 169.254.20.10 diff --git a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml index 37b5030d..2d706a03 100644 --- a/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml +++ b/roles/kubernetes/kubeadm/base/tasks/net_kubeguard.yml @@ -1,8 +1,10 @@ --- - name: make sure kubernetes_network_plugin_replaces_kube_proxy is not set + when: + - kubernetes_network_plugin_variant != 'with-kube-router' run_once: yes assert: - msg: "this network plugin can not replace kube-proxy please set kubernetes_network_plugin_replaces_kube_proxy to false." + msg: "kubeguard variant '{{ kubernetes_network_plugin_variant }}' can not replace kube-proxy please set kubernetes_network_plugin_replaces_kube_proxy to false or configure a differnt kubernetes_network_plugin_variant." that: - not kubernetes_network_plugin_replaces_kube_proxy @@ -82,3 +84,12 @@ template: src: net_kubeguard/cni.json.j2 dest: /etc/cni/net.d/kubeguard.json + +- name: install packages needed for debugging kube-router + when: kubernetes_network_plugin_variant == 'with-kube-router' + apt: + name: + - iptables + - ipvsadm + - ipset + state: present diff --git a/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml b/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml index 95fee7c8..f364fb5f 100644 --- a/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml +++ b/roles/kubernetes/kubeadm/master/tasks/net_kubeguard.yml @@ -1,3 +1,13 @@ --- -### kubeguard needs to be deployed before the cluster has been initialized. -### there is nothing more todo here. +- name: install kube-router variant + when: "kubernetes_network_plugin_variant == 'with-kube-router'" + block: + - name: generate kubeguard (kube-router) configuration + template: + src: "net_kubeguard/kube-router.{{ kubernetes_network_plugin_version }}.yml.j2" + dest: /etc/kubernetes/network-plugin.yml + + - name: install kubeguard (kube-router) on to the cluster + command: kubectl --kubeconfig /etc/kubernetes/admin.conf apply -f /etc/kubernetes/network-plugin.yml + register: kubeguard_apply_result + changed_when: (kubeguard_apply_result.stdout_lines | reject("regex", " unchanged$") | list | length) > 0 diff --git a/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2 b/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2 new file mode 100644 index 00000000..51bfdaae --- /dev/null +++ b/roles/kubernetes/kubeadm/master/templates/net_kubeguard/kube-router.0.4.0.yml.j2 @@ -0,0 +1,171 @@ +apiVersion: v1 +kind: ConfigMap +metadata: + name: kube-router-kubeconfig + namespace: kube-system + labels: + tier: node + k8s-app: kube-router +data: + kubeconfig.conf: | + apiVersion: v1 + kind: Config + clusters: + - cluster: + certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt + server: https://127.0.0.1:{{ kubernetes_api_lb_port | default('6443') }} + name: default + contexts: + - context: + cluster: default + namespace: default + user: default + name: default + current-context: default + users: + - name: default + user: + tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token +--- +apiVersion: apps/v1 +kind: DaemonSet +metadata: + labels: + k8s-app: kube-router + tier: node + name: kube-router + namespace: kube-system +spec: + selector: + matchLabels: + k8s-app: kube-router + tier: node + template: + metadata: + labels: + k8s-app: kube-router + tier: node + annotations: + prometheus.io/scrape: "true" + prometheus.io/port: "8080" + spec: + priorityClassName: system-node-critical + serviceAccountName: kube-router + serviceAccount: kube-router + containers: + - name: kube-router + image: docker.io/cloudnativelabs/kube-router:v{{ kubernetes_network_plugin_version }} + imagePullPolicy: Always + args: + - --run-router=false + - --run-firewall=true + - --run-service-proxy={{ kubernetes_network_plugin_replaces_kube_proxy | string | lower }} + - --kubeconfig=/var/lib/kube-router/kubeconfig + - --hairpin-mode + - --iptables-sync-period=10s + - --ipvs-sync-period=10s + env: + - name: NODE_NAME + valueFrom: + fieldRef: + fieldPath: spec.nodeName + livenessProbe: + httpGet: + path: /healthz + port: 20244 + initialDelaySeconds: 10 + periodSeconds: 3 + resources: + requests: + cpu: 250m + memory: 250Mi + securityContext: + privileged: true + volumeMounts: + - name: lib-modules + mountPath: /lib/modules + readOnly: true + - name: kubeconfig + mountPath: /var/lib/kube-router + readOnly: true + - name: xtables-lock + mountPath: /run/xtables.lock + readOnly: false + hostNetwork: true + tolerations: + - key: CriticalAddonsOnly + operator: Exists + - effect: NoSchedule + key: node-role.kubernetes.io/master + operator: Exists + - effect: NoSchedule + key: node.kubernetes.io/not-ready + operator: Exists + volumes: + - name: lib-modules + hostPath: + path: /lib/modules + - name: kubeconfig + configMap: + name: kube-router-kubeconfig + items: + - key: kubeconfig.conf + path: kubeconfig + - name: xtables-lock + hostPath: + path: /run/xtables.lock + type: FileOrCreate +--- +apiVersion: v1 +kind: ServiceAccount +metadata: + name: kube-router + namespace: kube-system +--- +kind: ClusterRole +apiVersion: rbac.authorization.k8s.io/v1beta1 +metadata: + name: kube-router + namespace: kube-system +rules: + - apiGroups: + - "" + resources: + - namespaces + - pods + - services + - nodes + - endpoints + verbs: + - list + - get + - watch + - apiGroups: + - "networking.k8s.io" + resources: + - networkpolicies + verbs: + - list + - get + - watch + - apiGroups: + - extensions + resources: + - networkpolicies + verbs: + - get + - list + - watch +--- +kind: ClusterRoleBinding +apiVersion: rbac.authorization.k8s.io/v1beta1 +metadata: + name: kube-router +roleRef: + apiGroup: rbac.authorization.k8s.io + kind: ClusterRole + name: kube-router +subjects: +- kind: ServiceAccount + name: kube-router + namespace: kube-system -- cgit v1.2.3