Remove end of life ubuntu versions in CI (#10107)

* tests: replace ubuntu16 with ubuntu20

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* tests: replace ubuntu18 with ubuntu20

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* docs: update docs to remove support for ubuntu 16 and 18

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* molecule: upgrade ubuntu versions

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* vagrant: upgrade ubuntu versions

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* tests: cleanup ubuntu{16,18}

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

* tests: increase ubuntu22 ram to allow molecule creation

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

---------

Signed-off-by: Arthur Outhenin-Chalandre <arthur.outhenin-chalandre@proton.ch>

tests/files/packet_ubuntu18-aio-docker.yml

@@ -1,9 +0,0 @@
----
-# Instance settings
-cloud_image: ubuntu-1804
-mode: aio
-
-# Use docker
-container_manager: docker
-etcd_deployment_type: docker
-resolvconf_mode: docker_dns

tests/files/packet_ubuntu18-calico-aio.yml

@@ -1,4 +0,0 @@
----
-# Instance settings
-cloud_image: ubuntu-1804
-mode: aio

tests/files/packet_ubuntu18-flannel-ha.yml

@@ -1,24 +0,0 @@
----
-# Instance settings
-cloud_image: ubuntu-1804
-mode: ha
-
-# Kubespray settings
-kubeadm_certificate_key: 3998c58db6497dd17d909394e62d515368c06ec617710d02edea31c06d741085
-kube_proxy_mode: iptables
-kube_network_plugin: flannel
-helm_enabled: true
-krew_enabled: true
-kubernetes_audit: true
-etcd_events_cluster_enabled: true
-local_volume_provisioner_enabled: true
-kube_encrypt_secret_data: true
-ingress_nginx_enabled: true
-ingress_nginx_webhook_enabled: true
-ingress_nginx_webhook_job_ttl: 30
-cert_manager_enabled: true
-# Disable as health checks are still unstable and slow to respond.
-metrics_server_enabled: false
-metrics_server_kubelet_insecure_tls: true
-kube_token_auth: true
-enable_nodelocaldns: false

tests/files/packet_ubuntu20-calico-ha-recover-noquorum.yml

@@ -1,4 +1,4 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1804
+cloud_image: ubuntu-2004
 mode: ha-recover-noquorum

tests/files/packet_ubuntu20-calico-ha-recover.yml

@@ -1,4 +1,4 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1804
+cloud_image: ubuntu-2004
 mode: ha-recover

tests/files/packet_ubuntu20-cilium-sep.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1804
+cloud_image: ubuntu-2004
 mode: separate
 
 # Kubespray settings

tests/files/packet_ubuntu20-crio.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1804
+cloud_image: ubuntu-2004
 mode: default
 
 # Kubespray settings

tests/files/packet_ubuntu20-docker-weave-sep.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1604
+cloud_image: ubuntu-2004
 mode: separate
 
 # Kubespray settings

tests/files/packet_ubuntu20-flannel-ha-once.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1804
+cloud_image: ubuntu-2004
 mode: ha
 
 # Kubespray settings

tests/files/packet_ubuntu20-flannel-ha.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1604
+cloud_image: ubuntu-2004
 mode: ha
 
 # Kubespray settings

tests/files/vagrant_ubuntu18-flannel.rb

@@ -1,7 +0,0 @@
-# For CI we are not worries about data persistence across reboot
-$libvirt_volume_cache = "unsafe"
-
-# Checking for box update can trigger API rate limiting
-# https://www.vagrantup.com/docs/vagrant-cloud/request-limits.html
-$box_check_update = false
-$vm_cpus = 2

tests/files/vagrant_ubuntu18-flannel.yml

@@ -1,3 +0,0 @@
----
-# Kubespray settings
-kube_network_plugin: flannel

tests/files/vagrant_ubuntu20-kube-router-sep.rb

@@ -1,6 +1,6 @@
 $num_instances = 2
 $vm_memory ||= 2048
-$os = "ubuntu1604"
+$os = "ubuntu2004"
 
 $kube_master_instances = 1
 $etcd_instances = 1

tests/files/vagrant_ubuntu20-kube-router-sep.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1604
+cloud_image: ubuntu-2004
 mode: separate
 
 # Kubespray settings

tests/files/vagrant_ubuntu20-kube-router-svc-proxy.rb

@@ -1,4 +1,4 @@
-$os = "ubuntu1604"
+$os = "ubuntu2004"
 
 # For CI we are not worried about data persistence across reboot
 $libvirt_volume_cache = "unsafe"

tests/files/vagrant_ubuntu20-kube-router-svc-proxy.yml

@@ -1,6 +1,6 @@
 ---
 # Instance settings
-cloud_image: ubuntu-1604
+cloud_image: ubuntu-2004
 mode: separate
 
 # Kubespray settings

tests/files/vagrant_ubuntu20-weave-medium.rb

@@ -1,6 +1,6 @@
 $num_instances = 16
 $vm_memory ||= 2048
-$os = "ubuntu1804"
+$os = "ubuntu2004"
 $network_plugin = "weave"
 $kube_master_instances = 1
 $etcd_instances = 1