Add keepalived to ansible

Adds the needed ansible bits to support keepalived

Closes-Bug: #1479934
Change-Id: Iace29b23a0e923b1f5dc9a4f5bc0f88afce3ae62
Partially-Implements: blueprint ansible-service

ansible/roles/haproxy/defaults/main.yml

@@ -14,3 +14,14 @@ kolla_haproxy_container_name: "haproxy"
 docker_haproxy_image: "{{ docker_haproxy_registry }}{{ docker_haproxy_namespace }}/{{ kolla_haproxy_base_distro }}-{{ kolla_haproxy_install_type }}-{{ kolla_haproxy_container_name }}"
 docker_haproxy_tag: "{{ openstack_release }}"
 docker_haproxy_image_full: "{{ docker_haproxy_image }}:{{ docker_haproxy_tag }}"
+
+
+docker_keepalived_registry: "{{ docker_registry }}"
+docker_keepalived_namespace: "{{ docker_namespace }}"
+kolla_keepalived_base_distro: "{{ kolla_base_distro }}"
+kolla_keepalived_install_type: "{{ kolla_install_type }}"
+kolla_keepalived_container_name: "keepalived"
+
+docker_keepalived_image: "{{ docker_keepalived_registry }}{{ docker_keepalived_namespace }}/{{ kolla_keepalived_base_distro }}-{{ kolla_keepalived_install_type }}-{{ kolla_keepalived_container_name }}"
+docker_keepalived_tag: "{{ openstack_release }}"
+docker_keepalived_image_full: "{{ docker_keepalived_image }}:{{ docker_keepalived_tag }}"

ansible/roles/haproxy/tasks/config.yml

@@ -12,3 +12,14 @@
 
 - name: Allowing non-local IP binding
   sysctl: name="net.ipv4.ip_nonlocal_bind" value=1 sysctl_set=yes
+
+- name: Ensuring config directory exists
+  file:
+    path: "{{ node_config_directory }}/keepalived/"
+    state: "directory"
+    recurse: "yes"
+
+- name: Copying over config(s)
+  template:
+    src: "keepalived.conf.j2"
+    dest: "{{ node_config_directory }}/keepalived/keepalived.conf"

ansible/roles/haproxy/tasks/start.yml

@@ -1,4 +1,14 @@
 ---
+- include: ../../start.yml
+  vars:
+    container_image: "{{ docker_keepalived_image_full }}"
+    container_name: "keepalived"
+    container_privileged: "True"
+    container_volumes:
+      - "{{ node_config_directory }}/keepalived/:/opt/kolla/keepalived/:ro"
+    container_environment:
+      KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
+
 - include: ../../start.yml
   vars:
     container_image: "{{ docker_haproxy_image_full }}"

ansible/roles/haproxy/templates/keepalived.conf.j2

@@ -0,0 +1,19 @@
+vrrp_script check_alive {
+    script "/check_alive.sh"
+    interval 2
+    weight -10
+}
+
+vrrp_instance Floating {
+    state MASTER
+    interface {{ api_interface }}
+    virtual_router_id 51
+    priority {{ groups['database'].index(inventory_hostname) }}
+    advert_int 1
+    virtual_ipaddress {
+        {{ kolla_internal_address }}
+    }
+    track_script {
+        check_alive
+    }
+}

docker/centos/binary/keepalived/Dockerfile

@@ -8,6 +8,7 @@ RUN yum -y install \
     && yum clean all
 
 COPY keepalived.conf /etc/keepalived/
-
 COPY start.sh check_alive.sh /
+COPY config-internal.sh config-external.sh /opt/kolla/
+
 CMD ["/start.sh"]

docker/centos/binary/keepalived/config-external.sh

@@ -0,0 +1 @@
+../../../common/keepalived/config-external.sh

docker/centos/binary/keepalived/config-internal.sh

@@ -0,0 +1 @@
+../../../common/keepalived/config-internal.sh

docker/common/keepalived/config-external.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+SOURCE="/opt/kolla/keepalived/keepalived.conf"
+TARGET="/etc/keepalived/keepalived.conf"
+OWNER="root"
+
+if [[ -f "$SOURCE" ]]; then
+    rm $TARGET
+    cp $SOURCE $TARGET
+    chown ${OWNER}: $TARGET
+    chmod 0644 $TARGET
+fi

docker/common/keepalived/config-internal.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+. /opt/kolla/kolla-common.sh
+
+check_required_vars KEEPALIVED_HOST_PRIORITIES \
+                    PUBLIC_INTERFACE \
+                    PUBLIC_IP
+
+MY_HOSTNAME=`hostname`
+
+# here we unpack KEEPALIVED_HOST_PRIORITIES hostname:priority pairs and match
+# them with current hostname, if it's there
+for i in ${KEEPALIVED_HOST_PRIORITIES//,/ }; do
+    HOST_PRIORITY=(${i//:/ })
+    if [ "$MY_HOSTNAME" == "${HOST_PRIORITY[0]}" ]; then
+        KEEPALIVED_PRIORITY=${HOST_PRIORITY[1]}
+    fi
+done
+
+if [ -z "$KEEPALIVED_PRIORITY" ]; then
+    echo "ERROR: missing hostname in KEEPALIVED_HOST_PRIORITIES: $MY_HOSTNAME" >&2
+    exit 1
+fi
+
+sed -i '
+    s|@PUBLIC_INTERFACE@|'$PUBLIC_INTERFACE'|g
+    s|@PUBLIC_IP@|'$PUBLIC_IP'|g
+    s|@KEEPALIVED_PRIORITY@|'$KEEPALIVED_PRIORITY'|g
+' /etc/keepalived/keepalived.conf
+
+exec /usr/sbin/keepalived -nld -p /run/keepalived.pid

docker/common/keepalived/start.sh

@@ -1,31 +1,13 @@
 #!/bin/bash
+set -o errexit
 
-. /opt/kolla/kolla-common.sh
+CMD="/usr/sbin/keepalived"
+ARGS="-nld -p /run/keepalived.pid"
 
-check_required_vars KEEPALIVED_HOST_PRIORITIES \
-                    PUBLIC_INTERFACE \
-                    PUBLIC_IP
+# Loading common functions.
+source /opt/kolla/kolla-common.sh
 
-MY_HOSTNAME=`hostname`
+# Config-internal script exec out of this function, it does not return here.
+set_configs
 
-# here we unpack KEEPALIVED_HOST_PRIORITIES hostname:priority pairs and match
-# them with current hostname, if it's there
-for i in ${KEEPALIVED_HOST_PRIORITIES//,/ }; do
-    HOST_PRIORITY=(${i//:/ })
-    if [ "$MY_HOSTNAME" == "${HOST_PRIORITY[0]}" ]; then
-        KEEPALIVED_PRIORITY=${HOST_PRIORITY[1]}
-    fi
-done
-
-if [ -z "$KEEPALIVED_PRIORITY" ]; then
-    echo "ERROR: missing hostname in KEEPALIVED_HOST_PRIORITIES: $MY_HOSTNAME" >&2
-    exit 1
-fi
-
-sed -i '
-    s|@PUBLIC_INTERFACE@|'$PUBLIC_INTERFACE'|g
-    s|@PUBLIC_IP@|'$PUBLIC_IP'|g
-    s|@KEEPALIVED_PRIORITY@|'$KEEPALIVED_PRIORITY'|g
-' /etc/keepalived/keepalived.conf
-
-exec /usr/sbin/keepalived -nld -p /run/keepalived.pid
+exec $CMD $ARGS