diff options
Diffstat (limited to 'roles/kubernetes')
21 files changed, 558 insertions, 0 deletions
diff --git a/roles/kubernetes/base/files/kubernetes-apt-key.asc b/roles/kubernetes/base/files/kubernetes-apt-key.asc new file mode 100644 index 00000000..10af13ea --- /dev/null +++ b/roles/kubernetes/base/files/kubernetes-apt-key.asc @@ -0,0 +1,18 @@ +-----BEGIN PGP PUBLIC KEY BLOCK----- + +mQENBFrBaNsBCADrF18KCbsZlo4NjAvVecTBCnp6WcBQJ5oSh7+E98jX9YznUCrN +rgmeCcCMUvTDRDxfTaDJybaHugfba43nqhkbNpJ47YXsIa+YL6eEE9emSmQtjrSW +IiY+2YJYwsDgsgckF3duqkb02OdBQlh6IbHPoXB6H//b1PgZYsomB+841XW1LSJP +YlYbIrWfwDfQvtkFQI90r6NknVTQlpqQh5GLNWNYqRNrGQPmsB+NrUYrkl1nUt1L +RGu+rCe4bSaSmNbwKMQKkROE4kTiB72DPk7zH4Lm0uo0YFFWG4qsMIuqEihJ/9KN +X8GYBr+tWgyLooLlsdK3l+4dVqd8cjkJM1ExABEBAAG0QEdvb2dsZSBDbG91ZCBQ +YWNrYWdlcyBBdXRvbWF0aWMgU2lnbmluZyBLZXkgPGdjLXRlYW1AZ29vZ2xlLmNv +bT6JAT4EEwECACgFAlrBaNsCGy8FCQWjmoAGCwkIBwMCBhUIAgkKCwQWAgMBAh4B +AheAAAoJEGoDCyG6B/T78e8H/1WH2LN/nVNhm5TS1VYJG8B+IW8zS4BqyozxC9iJ +AJqZIVHXl8g8a/Hus8RfXR7cnYHcg8sjSaJfQhqO9RbKnffiuQgGrqwQxuC2jBa6 +M/QKzejTeP0Mgi67pyrLJNWrFI71RhritQZmzTZ2PoWxfv6b+Tv5v0rPaG+ut1J4 +7pn+kYgtUaKdsJz1umi6HzK6AacDf0C0CksJdKG7MOWsZcB4xeOxJYuy6NuO6Kcd +Ez8/XyEUjIuIOlhYTd0hH8E/SEBbXXft7/VBQC5wNq40izPi+6WFK/e1O42DIpzQ +749ogYQ1eodexPNhLzekKR3XhGrNXJ95r5KO10VrsLFNd8I= +=TKuP +-----END PGP PUBLIC KEY BLOCK----- diff --git a/roles/kubernetes/base/handlers/main.yml b/roles/kubernetes/base/handlers/main.yml new file mode 100644 index 00000000..b61c1417 --- /dev/null +++ b/roles/kubernetes/base/handlers/main.yml @@ -0,0 +1,5 @@ +--- +- name: reload systemd + command: systemctl daemon-reload + args: + warn: no diff --git a/roles/kubernetes/base/meta/main.yml b/roles/kubernetes/base/meta/main.yml new file mode 100644 index 00000000..724b20f1 --- /dev/null +++ b/roles/kubernetes/base/meta/main.yml @@ -0,0 +1,3 @@ +--- +dependencies: +- role: docker diff --git a/roles/kubernetes/base/tasks/main.yml b/roles/kubernetes/base/tasks/main.yml new file mode 100644 index 00000000..cc3bc83a --- /dev/null +++ b/roles/kubernetes/base/tasks/main.yml @@ -0,0 +1,90 @@ +--- +- name: prepare /var/lib/kubelet as LVM + when: kubelet_lvm is defined + block: + + - name: create logical volume + lvol: + vg: "{{ kubelet_lvm.vg }}" + lv: "{{ kubelet_lvm.lv }}" + size: "{{ kubelet_lvm.size }}" + + - name: create filesystem + filesystem: + fstype: "{{ kubelet_lvm.fs }}" + dev: "/dev/mapper/{{ kubelet_lvm.vg | replace('-', '--') }}-{{ kubelet_lvm.lv | replace('-', '--') }}" + + - name: mount filesytem + mount: + src: "/dev/mapper/{{ kubelet_lvm.vg | replace('-', '--') }}-{{ kubelet_lvm.lv | replace('-', '--') }}" + path: /var/lib/kubelet + fstype: "{{ kubelet_lvm.fs }}" + state: mounted + +- name: install apt https transport + apt: + name: apt-transport-https + state: present + force: yes + +- name: add kubernetes apt key + apt_key: + data: "{{ lookup('file', 'kubernetes-apt-key.asc') }}" + state: present + +- name: add kubernetes apt repo + apt_repository: + repo: deb http://apt.kubernetes.io/ kubernetes-xenial main + state: present + filename: kubernetes + +- name: install basic kubernetes components + with_items: + - "kubelet{% if kubernetes.pkg_version is defined %}={{ kubernetes.pkg_version }}{% endif %}" + - "kubeadm{% if kubernetes.pkg_version is defined %}={{ kubernetes.pkg_version }}{% endif %}" + - "kubectl{% if kubernetes.pkg_version is defined %}={{ kubernetes.pkg_version }}{% endif %}" + apt: + name: "{{ item }}" + state: present + +- name: disable automatic upgrades for kubernetes components + when: kubernetes.pkg_version is defined + with_items: + - kubelet + - kubeadm + - kubectl + dpkg_selections: + name: "{{ item }}" + selection: hold + +- name: install kubelet config snippets + with_items: + - 20-dns.conf + - 50-extra.conf + template: + src: "{{ item }}.j2" + dest: "/etc/systemd/system/kubelet.service.d/{{ item }}" + notify: reload systemd + +- name: add dummy group with gid 998 + group: + name: app + gid: 998 + +- name: add dummy user with uid 998 + user: + name: app + uid: 998 + group: app + password: "!" + +- name: add kubectl config for shells + with_items: + - zsh + - bash + blockinfile: + path: "/root/.{{ item }}rc" + create: yes + marker: "### {mark} ANSIBLE MANAGED BLOCK for kubectl ###" + content: | + source <(kubectl completion {{ item }}) diff --git a/roles/kubernetes/base/templates/20-dns.conf.j2 b/roles/kubernetes/base/templates/20-dns.conf.j2 new file mode 100644 index 00000000..9b7ab32c --- /dev/null +++ b/roles/kubernetes/base/templates/20-dns.conf.j2 @@ -0,0 +1,2 @@ +[Service] +Environment="KUBELET_DNS_ARGS=--cluster-dns={{ kubernetes.service_ip_range | ipaddr(10) | ipaddr('address') }} --cluster-domain=cluster.local" diff --git a/roles/kubernetes/base/templates/50-extra.conf.j2 b/roles/kubernetes/base/templates/50-extra.conf.j2 new file mode 100644 index 00000000..c722ade6 --- /dev/null +++ b/roles/kubernetes/base/templates/50-extra.conf.j2 @@ -0,0 +1,3 @@ +{% set br_net = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubernetes.net_index[inventory_hostname]) -%} +[Service] +Environment="KUBELET_EXTRA_ARGS=--node-ip={{ br_net | ipaddr(1) | ipaddr('address') }}" diff --git a/roles/kubernetes/master/tasks/main.yml b/roles/kubernetes/master/tasks/main.yml new file mode 100644 index 00000000..c9092bf3 --- /dev/null +++ b/roles/kubernetes/master/tasks/main.yml @@ -0,0 +1,98 @@ +--- +- name: check if kubeconfig admin.conf already exists + stat: + path: /etc/kubernetes/admin.conf + register: kubeconfig_admin_stats + +### cluster not yet initialized + +- name: create new cluster + when: kubeconfig_admin_stats.stat.exists == False + block: + + - name: generate bootstrap token for new cluster + command: kubeadm token generate + changed_when: False + check_mode: no + register: kubeadm_token_generate + + - name: set up kubernetes master + command: "kubeadm init --pod-network-cidr {{ kubernetes.pod_ip_range }} --service-cidr {{ kubernetes.service_ip_range }} --apiserver-advertise-address {{ kubernetes.api_advertise_ip | default('0.0.0.0') }} {% if kubernetes.api_extra_sans | length > 0 %}--apiserver-cert-extra-sans {{ kubernetes.api_extra_sans | join(',') }}{% endif %} --token '{{ kubeadm_token_generate.stdout }}' --token-ttl 42m --skip-token-print" + args: + creates: /etc/kubernetes/pki/ca.crt + register: kubeadm_init + + - name: dump output of kubeadm init to log file + when: kubeadm_init.changed + copy: + content: "{{ kubeadm_init.stdout }}\n" + dest: /etc/kubernetes/kubeadm-init.log + +### cluster is already initialized + +- name: prepare cluster for new nodes + when: kubeconfig_admin_stats.stat.exists == True + block: + + - name: fetch list of current nodes + command: kubectl get nodes -o name + changed_when: False + check_mode: no + register: kubectl_node_list + + - name: save list of current nodes + set_fact: + kubernetes_current_nodes: "{{ kubectl_node_list.stdout_lines | map('replace', 'nodes/', '') | list }}" + + - name: create bootstrap token for existing cluster + when: kubernetes_nodes | difference(kubernetes_current_nodes) | length > 0 + command: kubeadm token create --ttl 42m + check_mode: no + register: kubeadm_token_create + +## + +- name: check if master is tainted (1/2) + command: "kubectl --kubeconfig /etc/kubernetes/admin.conf get node {{ inventory_hostname }} -o json" + check_mode: no + register: kubectl_get_node + changed_when: False + +- name: check if master is tainted (2/2) + set_fact: + kube_node_taints: "{% set node_info = kubectl_get_node.stdout | from_json %}{%if node_info.spec.taints is defined %}{{ node_info.spec.taints | map(attribute='key') | list }}{% endif %}" + +- name: remove taint from master node + when: "kubernetes.dedicated_master == False and 'node-role.kubernetes.io/master' in kube_node_taints" + command: kubectl --kubeconfig /etc/kubernetes/admin.conf taint nodes --all node-role.kubernetes.io/master- + +- name: add taint for master node + when: "kubernetes.dedicated_master == True and 'node-role.kubernetes.io/master' not in kube_node_taints" + command: "kubectl --kubeconfig /etc/kubernetes/admin.conf taint nodes {{ ansible_nodename }} node-role.kubernetes.io/master='':NoSchedule" + +- name: install openssl + apt: + name: openssl + state: present + +- name: get ca certificate digest + shell: "openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'" + check_mode: no + register: kube_ca_openssl + changed_when: False + +- name: set variables needed by kubernetes/nodes to join the cluster + set_fact: + kube_bootstrap_token: "{% if kubeadm_token_generate.stdout is defined %}{{ kubeadm_token_generate.stdout }}{% elif kubeadm_token_create.stdout is defined %}{{ kubeadm_token_create.stdout }}{% endif %}" + kube_bootstrap_ca_cert_hash: "sha256:{{ kube_ca_openssl.stdout }}" + +- name: prepare kubectl (1/2) + file: + name: /root/.kube + state: directory + +- name: prepare kubectl (2/2) + file: + dest: /root/.kube/config + src: /etc/kubernetes/admin.conf + state: link diff --git a/roles/kubernetes/net/files/daemon.json b/roles/kubernetes/net/files/daemon.json new file mode 100644 index 00000000..28001640 --- /dev/null +++ b/roles/kubernetes/net/files/daemon.json @@ -0,0 +1,4 @@ +{ + "bridge": "none", + "iptables": false +} diff --git a/roles/kubernetes/net/files/kubenet-interfaces.service b/roles/kubernetes/net/files/kubenet-interfaces.service new file mode 100644 index 00000000..f27fb85b --- /dev/null +++ b/roles/kubernetes/net/files/kubenet-interfaces.service @@ -0,0 +1,12 @@ +[Unit] +Description=Kubernetes Network Interfaces +After=network.target + +[Service] +Type=oneshot +ExecStart=/var/lib/kubenet/ifupdown.sh up +ExecStop=/var/lib/kubenet/ifupdown.sh down +RemainAfterExit=yes + +[Install] +WantedBy=multi-user.target diff --git a/roles/kubernetes/net/filter_plugins/kubenet.py b/roles/kubernetes/net/filter_plugins/kubenet.py new file mode 100644 index 00000000..c1312dd8 --- /dev/null +++ b/roles/kubernetes/net/filter_plugins/kubenet.py @@ -0,0 +1,33 @@ +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): + + ''' Kubernetes Network Filters ''' + filter_map = { + 'direct_net_zone': direct_net_zone, + } + + def filters(self): + return self.filter_map diff --git a/roles/kubernetes/net/handlers/main.yml b/roles/kubernetes/net/handlers/main.yml new file mode 100644 index 00000000..bb7fde2b --- /dev/null +++ b/roles/kubernetes/net/handlers/main.yml @@ -0,0 +1,4 @@ +--- +- name: reload systemd + systemd: + daemon_reload: yes diff --git a/roles/kubernetes/net/meta/main.yml b/roles/kubernetes/net/meta/main.yml new file mode 100644 index 00000000..03dfcb23 --- /dev/null +++ b/roles/kubernetes/net/meta/main.yml @@ -0,0 +1,4 @@ +--- +dependencies: +- role: wireguard + when: k8s_remove_node is not defined diff --git a/roles/kubernetes/net/tasks/add.yml b/roles/kubernetes/net/tasks/add.yml new file mode 100644 index 00000000..f4e422c6 --- /dev/null +++ b/roles/kubernetes/net/tasks/add.yml @@ -0,0 +1,114 @@ +--- +- name: create docker config directory + file: + name: /etc/docker + state: directory + mode: 0700 + +- name: disable docker iptables and bridge + copy: + src: daemon.json + dest: /etc/docker/daemon.json + +- name: create network config directory + file: + name: /var/lib/kubenet/ + state: directory + +- name: configure wireguard port + set_fact: + kubenet_wireguard_port: "{{ kubernetes.wireguard_port | default(51820) }}" + +- name: install ifupdown script + template: + src: ifupdown.sh.j2 + dest: /var/lib/kubenet/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/kubenet/kube-wg0.privatekey" + args: + creates: /var/lib/kubenet/kube-wg0.privatekey + +- name: fetch wireguard public key + shell: "wg pubkey < /var/lib/kubenet/kube-wg0.privatekey" + register: kubenet_wireguard_pubkey + changed_when: false + check_mode: no + +- name: install systemd service unit for network interfaces + copy: + src: kubenet-interfaces.service + dest: /etc/systemd/system/kubenet-interfaces.service + # TODO: notify: reload??? + +- name: make sure kubenet interfaces service is started and enabled + systemd: + daemon_reload: yes + name: kubenet-interfaces.service + state: started + enabled: yes + +- name: get list of currently installed kubenet peers + find: + path: /etc/systemd/system/ + pattern: "kubenet-peer-*.service" + register: kubenet_peers_installed + +- name: compute list of peers to be added + set_fact: + kubenet_peers_to_add: "{{ kubernetes_nodes | difference(inventory_hostname) }}" + +- name: compute list of peers to be removed + set_fact: + kubenet_peers_to_remove: "{{ kubenet_peers_installed.files | map(attribute='path') | map('replace', '/etc/systemd/system/kubenet-peer-', '') | map('replace', '.service', '') | difference(kubenet_peers_to_add) }}" + +- name: stop/disable systemd units for stale kubenet peers + with_items: "{{ kubenet_peers_to_remove }}" + systemd: + name: "kubenet-peer-{{ item }}.service" + state: stopped + enabled: no + +- name: remove systemd units for stale kubenet peers + with_items: "{{ kubenet_peers_to_remove }}" + file: + name: "/etc/systemd/system/kubenet-peer-{{ item }}.service" + state: absent + +- name: install systemd units for every kubenet peer + with_items: "{{ kubenet_peers_to_add }}" + loop_control: + loop_var: peer + template: + src: kubenet-peer.service.j2 + dest: "/etc/systemd/system/kubenet-peer-{{ peer }}.service" + # TODO: notify restart for peers that change... + +- name: make sure kubenet peer services are started and enabled + with_items: "{{ kubenet_peers_to_add }}" + systemd: + daemon_reload: yes + name: "kubenet-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/tasks/main.yml b/roles/kubernetes/net/tasks/main.yml new file mode 100644 index 00000000..8c94292e --- /dev/null +++ b/roles/kubernetes/net/tasks/main.yml @@ -0,0 +1,8 @@ +--- +- name: add node to overlay network + include_tasks: add.yml + when: k8s_remove_node is not defined + +- name: remove node from overlay network + include_tasks: remove.yml + when: k8s_remove_node is defined diff --git a/roles/kubernetes/net/tasks/remove.yml b/roles/kubernetes/net/tasks/remove.yml new file mode 100644 index 00000000..6695bd5d --- /dev/null +++ b/roles/kubernetes/net/tasks/remove.yml @@ -0,0 +1,28 @@ +--- +- name: check if kubenet interface service unit exists + stat: + path: /etc/systemd/system/kubenet-interfaces.service + register: kubenet_interface_unit + +- name: bring down kubenet interface + systemd: + name: kubenet-interfaces.service + state: stopped + when: kubenet_interface_unit.stat.exists + +- name: gather list of all kubenet related service units + find: + path: /etc/systemd/system/ + patterns: + - "kubenet-peer-*.service" + - kubenet-interfaces.service + register: kubenet_units_installed + +- name: remove all kubenet related files and directories + with_flattened: + - "{{ kubenet_units_installed.files | map(attribute='path') | list }}" + - /var/lib/kubenet + file: + path: "{{ item }}" + state: absent + notify: reload systemd diff --git a/roles/kubernetes/net/templates/ifupdown.sh.j2 b/roles/kubernetes/net/templates/ifupdown.sh.j2 new file mode 100644 index 00000000..995d358b --- /dev/null +++ b/roles/kubernetes/net/templates/ifupdown.sh.j2 @@ -0,0 +1,55 @@ +#!/bin/bash + +set -e + +CONF_D="/var/lib/kubenet/" + +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, kubernetes.net_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(kubernetes.net_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 "$TUN_IF" listen-port {{ kubenet_wireguard_port }} private-key "$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/templates/k8s.json.j2 b/roles/kubernetes/net/templates/k8s.json.j2 new file mode 100644 index 00000000..f457ed1c --- /dev/null +++ b/roles/kubernetes/net/templates/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, kubernetes.net_index[inventory_hostname]) }}" + } +} diff --git a/roles/kubernetes/net/templates/kubenet-peer.service.j2 b/roles/kubernetes/net/templates/kubenet-peer.service.j2 new file mode 100644 index 00000000..bee211af --- /dev/null +++ b/roles/kubernetes/net/templates/kubenet-peer.service.j2 @@ -0,0 +1,36 @@ +[Unit] +Description=Kubernetes Network Peer {{ peer }} +After=network.target +Requires=kubenet-interfaces.service +After=kubenet-interfaces.service + +{% set pod_net_peer = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, kubernetes.net_index[peer]) -%} +{% set direct_zone = kubernetes.direct_net_zones | direct_net_zone(inventory_hostname, peer) -%} +{% if direct_zone %} +{% set direct_ip = kubernetes.direct_net_zones[direct_zone].transfer_net | ipaddr(kubernetes.net_index[inventory_hostname]) %} +{% set direct_interface = kubernetes.direct_net_zones[direct_zone].node_interface[inventory_hostname] %} +{% set direct_ip_peer = kubernetes.direct_net_zones[direct_zone].transfer_net | ipaddr(kubernetes.net_index[peer]) %} +{% else %} +{% set tun_ip = kubernetes.pod_ip_range | ipsubnet(kubernetes.pod_ip_range_size, 0) | ipaddr(kubernetes.net_index[peer]) -%} +{% set wg_pubkey = hostvars[peer].kubenet_wireguard_pubkey.stdout -%} +{% set wg_host = hostvars[peer].external_ip | default(hostvars[peer].ansible_default_ipv4.address) -%} +{% set wg_port = hostvars[peer].kubenet_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') }} +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/node/tasks/add.yml b/roles/kubernetes/node/tasks/add.yml new file mode 100644 index 00000000..dd784b35 --- /dev/null +++ b/roles/kubernetes/node/tasks/add.yml @@ -0,0 +1,18 @@ +--- +- name: get master vars + set_fact: + kube_bootstrap_token: "{{ hostvars[kubernetes_nodes_master].kube_bootstrap_token }}" + kube_bootstrap_ca_cert_hash: "{{ hostvars[kubernetes_nodes_master].kube_bootstrap_ca_cert_hash }}" + kube_master_addr: "{{ kubernetes.api_advertise_ip | default(hostvars[kubernetes_nodes_master].ansible_default_ipv4.address) }}" + +- name: join kubernetes node + command: "kubeadm join --token {{ kube_bootstrap_token }} {{ kube_master_addr }}:6443 --discovery-token-ca-cert-hash {{ kube_bootstrap_ca_cert_hash }}" + args: + creates: /etc/kubernetes/kubelet.conf + register: kubeadm_join + +- name: dump output of kubeadm join to log file + when: kubeadm_join.changed + copy: + content: "{{ kubeadm_join.stdout }}\n" + dest: /etc/kubernetes/kubeadm-join.log diff --git a/roles/kubernetes/node/tasks/main.yml b/roles/kubernetes/node/tasks/main.yml new file mode 100644 index 00000000..d078d2fb --- /dev/null +++ b/roles/kubernetes/node/tasks/main.yml @@ -0,0 +1,8 @@ +--- +- name: add node cluster + include_tasks: add.yml + when: k8s_remove_node is not defined + +- name: remove node from cluster + include_tasks: remove.yml + when: k8s_remove_node is defined diff --git a/roles/kubernetes/node/tasks/remove.yml b/roles/kubernetes/node/tasks/remove.yml new file mode 100644 index 00000000..95787629 --- /dev/null +++ b/roles/kubernetes/node/tasks/remove.yml @@ -0,0 +1,3 @@ +--- +- name: clean up settings and files created by kubeadm + command: kubeadm reset |