From ddc8db7956cbf68afb1bb49401827e9b55ab139f Mon Sep 17 00:00:00 2001 From: Christian Pointner Date: Sat, 11 Jan 2020 03:35:03 +0100 Subject: kubernetes: new/updated kubeadm master role (WIP) --- roles/kubernetes/kubeadm/master/tasks/main.yml | 110 +++++++------------------ 1 file changed, 32 insertions(+), 78 deletions(-) (limited to 'roles/kubernetes/kubeadm/master/tasks/main.yml') diff --git a/roles/kubernetes/kubeadm/master/tasks/main.yml b/roles/kubernetes/kubeadm/master/tasks/main.yml index 7cc6fe94..9ffdbeee 100644 --- a/roles/kubernetes/kubeadm/master/tasks/main.yml +++ b/roles/kubernetes/kubeadm/master/tasks/main.yml @@ -1,70 +1,28 @@ --- -- 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: create kubernetes config directory - file: - path: /etc/kubernetes - state: directory - - ## TODO test whether the generated cluster configs really works - since it has never been used... - - name: install cluster config for kubeadm - template: - src: kubeadm-cluster.config.j2 - dest: /etc/kubernetes/kubeadm-cluster.config - - - name: set up kubernetes master - command: "kubeadm init --config '/etc/kubernetes/kubeadm-cluster.config' --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: create direcotry for encryption config + file: + name: /etc/kubernetes/encryption + state: directory + mode: 0700 -- name: prepare cluster for new nodes - when: kubeconfig_admin_stats.stat.exists == True - block: +- name: install encryption config + template: + src: encryption-config.j2 + dest: /etc/kubernetes/encryption/config + mode: 0600 - - 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', 'node/', '') | list }}" +- name: install primary master + include_tasks: primary-master.yml + when: "'_kubernetes_primary_master_' in group_names" - - 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: install secondary masters + include_tasks: secondary-masters.yml + when: "'_kubernetes_primary_master_' not in group_names" -## - name: check if master is tainted (1/2) - command: "kubectl --kubeconfig /etc/kubernetes/admin.conf get node {{ inventory_hostname }} -o json" + command: "kubectl --kubeconfig /etc/kubernetes/admin.conf get node {{ host_name }} -o json" check_mode: no register: kubectl_get_node changed_when: False @@ -74,28 +32,13 @@ 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- + when: not kubernetes.dedicated_master and 'node-role.kubernetes.io/master' in kube_node_taints + command: "kubectl --kubeconfig /etc/kubernetes/admin.conf taint nodes {{ host_name }} 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 + when: kubernetes.dedicated_master and 'node-role.kubernetes.io/master' not in kube_node_taints + command: "kubectl --kubeconfig /etc/kubernetes/admin.conf taint nodes {{ host_name }} node-role.kubernetes.io/master='':NoSchedule" -- 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: @@ -107,3 +50,14 @@ dest: /root/.kube/config src: /etc/kubernetes/admin.conf state: link + +- name: add kubectl completion 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 }}) -- cgit v1.2.3