Install ansible inside a venv instead of globally

Help reducing potential conflicts with metal3-dev-env.

Author: dtantsur

01_install_requirements.sh

@@ -110,16 +110,18 @@ elif [[ $GOARCH == "x86_64" ]]; then
     GOARCH="amd64"
 fi
 
+sudo python -m venv --system-site-packages "${ANSIBLE_VENV}"
+
 # Also need the 3.9 version of netaddr for ansible.netcommon
 # and lxml for the pyxpath script
-sudo python -m pip install netaddr lxml
+"${ANSIBLE_VENV}/bin/pip" install netaddr lxml
 
-sudo python -m pip install ansible=="${ANSIBLE_VERSION}"
+"${ANSIBLE_VENV}/bin/pip" install ansible=="${ANSIBLE_VERSION}"
 
 pushd ${METAL3_DEV_ENV_PATH}
-ansible-galaxy install -r vm-setup/requirements.yml
-ansible-galaxy collection install --upgrade ansible.netcommon ansible.posix ansible.utils community.general
-ANSIBLE_FORCE_COLOR=true ansible-playbook \
+"${ANSIBLE}-galaxy" install -r vm-setup/requirements.yml
+"${ANSIBLE}-galaxy" collection install --upgrade ansible.netcommon ansible.posix ansible.utils community.general
+ANSIBLE_FORCE_COLOR=true "${ANSIBLE}-playbook" \
   -e "working_dir=$WORKING_DIR" \
   -e "virthost=$HOSTNAME" \
   -e "go_version=$GO_VERSION" \

02_configure_host.sh

@@ -127,7 +127,7 @@ if [[ $(uname -m) == "aarch64" ]]; then
   echo "libvirt_cdrombus: scsi" >> vm_setup_vars.yml
 fi
 
-ansible-playbook \
+"${ANSIBLE}-playbook" \
     -e @vm_setup_vars.yml \
     -e "ironic_prefix=${CLUSTER_NAME}_" \
     -e "cluster_name=${CLUSTER_NAME}" \
@@ -327,7 +327,7 @@ if [[ "$(ipversion $PROVISIONING_HOST_IP)" == "6" ]]; then
     IPTABLES=ip6tables
 fi
 
-ANSIBLE_FORCE_COLOR=true ansible-playbook \
+ANSIBLE_FORCE_COLOR=true "${ANSIBLE}-playbook" \
     -e "{use_firewalld: True}" \
     -e "provisioning_interface=$PROVISIONING_NETWORK_NAME" \
     -e "baremetal_interface=$BAREMETAL_NETWORK_NAME" \

agent/05_agent_configure.sh

@@ -263,7 +263,7 @@ function generate_cluster_manifests() {
   set -x
 
   # Create manifests
-  ansible-playbook -vvv \
+  "${ANSIBLE}-playbook" -vvv \
           -e install_path=${SCRIPTDIR}/${INSTALL_CONFIG_PATH} \
           "${SCRIPTDIR}/agent/create-manifests-playbook.yaml"
 }

common.sh

@@ -94,6 +94,8 @@ export PROVISIONING_HOST_USER=${PROVISIONING_HOST_USER:-$USER}
 # The dev-scripts working directory
 export WORKING_DIR=${WORKING_DIR:-"/opt/dev-scripts"}
 OCP_DIR=${OCP_DIR:-ocp/${CLUSTER_NAME}}
+ANSIBLE_VENV=${ANSIBLE_VENV:-"${WORKING_DIR}/venv"}
+ANSIBLE="${ANSIBLE_VENV}/bin/ansible"
 
 # The DNS name for the registry that this cluster should use.
 export LOCAL_REGISTRY_DNS_NAME=${LOCAL_REGISTRY_DNS_NAME:-"virthost.${CLUSTER_NAME}.${BASE_DOMAIN}"}

host_cleanup.sh

@@ -15,7 +15,7 @@ fi
 
 export ANSIBLE_FORCE_COLOR=true
 
-ansible-playbook \
+"${ANSIBLE}-playbook" \
     -e @vm_setup_vars.yml \
     -e "ironic_prefix=${CLUSTER_NAME}_" \
     -e "cluster_name=${CLUSTER_NAME}" \

network.sh

@@ -6,7 +6,7 @@ function nth_ip() {
   network=$1
   idx=$2
 
-  python -c "from ansible_collections.ansible.utils.plugins.filter import nthhost; print(nthhost.nthhost('"$network"', $idx))"
+  "${ANSIBLE_VENV}/bin/python" -c "from ansible_collections.ansible.utils.plugins.filter import nthhost; print(nthhost.nthhost('"$network"', $idx))"
 }
 
 function ipversion(){

remote_nodes.sh

@@ -68,7 +68,7 @@ function playbook() {
 		VIRTBMC_ACTION="ignore"
 	fi
 
-	ansible-playbook \
+	"${ANSIBLE}-playbook" \
 		-e @vm_setup_vars.yml \
 		-e "ironic_prefix=${REMOTE_CLUSTER_NAME}_" \
 		-e "cluster_name=${REMOTE_CLUSTER_NAME}" \

utils.sh

@@ -787,7 +787,7 @@ function write_pull_secret() {
 
 function switch_to_internal_dns() {
   sudo mkdir -p /etc/NetworkManager/conf.d/
-  ansible localhost -b -m ini_file -a "path=/etc/NetworkManager/conf.d/dnsmasq.conf section=main option=dns value=dnsmasq"
+  "${ANSIBLE}" localhost -b -m ini_file -a "path=/etc/NetworkManager/conf.d/dnsmasq.conf section=main option=dns value=dnsmasq"
   if [ "$ADDN_DNS" ] ; then
     echo "server=$ADDN_DNS" | sudo tee /etc/NetworkManager/dnsmasq.d/upstream.conf
   fi