Remove etcd-proxy from all nodes and use etcd multiaccess
This commit is contained in:
parent
6b0d26ddf0
commit
95b460ae94
23 changed files with 55 additions and 380 deletions
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@ -5,10 +5,6 @@ The following components require a highly available endpoints:
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* etcd cluster,
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* kube-apiserver service instances.
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The former provides the
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[etcd-proxy](https://coreos.com/etcd/docs/latest/proxy.html) service to access
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the cluster members in HA fashion.
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The latter relies on a 3rd side reverse proxies, like Nginx or HAProxy, to
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achieve the same goal.
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@ -57,7 +53,7 @@ type. The following diagram shows how traffic to the apiserver is directed.
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A user may opt to use an external loadbalancer (LB) instead. An external LB
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provides access for external clients, while the internal LB accepts client
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connections only to the localhost, similarly to the etcd-proxy HA endpoints.
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connections only to the localhost.
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Given a frontend `VIP` address and `IP1, IP2` addresses of backends, here is
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an example configuration for a HAProxy service acting as an external LB:
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```
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@ -62,7 +62,7 @@ ndots: 5
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# Enable multiaccess to configure clients to access all of the etcd members directly
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# as the "http://hostX:port, http://hostY:port, ..." and ignore the proxy loadbalancers.
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# This may be the case if clients support and loadbalance multiple etcd servers natively.
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etcd_multiaccess: false
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etcd_multiaccess: true
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# Assume there are no internal loadbalancers for apiservers exist and listen on
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# kube_apiserver_port (default 443)
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@ -6,13 +6,6 @@
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- reload etcd
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- wait for etcd up
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- name: restart etcd-proxy
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command: /bin/true
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notify:
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- etcd | reload systemd
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- reload etcd-proxy
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- wait for etcd up
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- name: etcd | reload systemd
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command: systemctl daemon-reload
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when: ansible_service_mgr == "systemd"
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@ -20,7 +13,7 @@
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- name: wait for etcd up
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uri: url="http://{% if is_etcd_master %}{{ etcd_address }}{% else %}127.0.0.1{% endif %}:2379/health"
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register: result
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until: result.status == 200
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until: result.status is defined and result.status == 200
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retries: 10
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delay: 5
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@ -29,9 +22,3 @@
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name: etcd
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state: restarted
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when: is_etcd_master
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- name: reload etcd-proxy
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service:
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name: etcd-proxy
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state: restarted
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when: is_etcd_proxy
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@ -26,19 +26,3 @@
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mode: 0755
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when: ansible_service_mgr in ["sysvinit","upstart"] and ansible_os_family == "Debian" and is_etcd_master
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notify: restart etcd
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- name: Configure | Copy etcd-proxy.service systemd file
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template:
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src: "etcd-proxy-{{ etcd_deployment_type }}.service.j2"
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dest: /etc/systemd/system/etcd-proxy.service
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backup: yes
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when: ansible_service_mgr == "systemd" and is_etcd_proxy
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notify: restart etcd-proxy
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- name: Configure | Write etcd-proxy initd script
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template:
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src: "deb-etcd-proxy-{{ etcd_deployment_type }}.initd.j2"
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dest: /etc/init.d/etcd-proxy
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owner: root
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mode: 0755
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when: ansible_service_mgr in ["sysvinit","upstart"] and ansible_os_family == "Debian" and is_etcd_proxy
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notify: restart etcd-proxy
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@ -1,8 +1,13 @@
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---
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- include: pre_upgrade.yml
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- include: install.yml
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when: is_etcd_master
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- include: set_cluster_health.yml
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when: is_etcd_master
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- include: configure.yml
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when: is_etcd_master
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- include: refresh_config.yml
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when: is_etcd_master
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- name: Ensure etcd is running
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service:
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@ -11,23 +16,11 @@
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enabled: yes
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when: is_etcd_master
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- name: Ensure etcd-proxy is running
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service:
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name: etcd-proxy
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state: started
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enabled: yes
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when: is_etcd_proxy
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- name: Restart etcd if binary changed
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command: /bin/true
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notify: restart etcd
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when: etcd_deployment_type == "host" and etcd_copy.stdout_lines and is_etcd_master
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- name: Restart etcd-proxy if binary changed
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command: /bin/true
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notify: restart etcd-proxy
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when: etcd_deployment_type == "host" and etcd_copy.stdout_lines and is_etcd_proxy
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# Reload systemd before starting service
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- meta: flush_handlers
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@ -35,4 +28,6 @@
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# initial state of the cluster is in `existing`
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# state insted of `new`.
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- include: set_cluster_health.yml
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when: is_etcd_master
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- include: refresh_config.yml
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when: is_etcd_master
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@ -5,10 +5,3 @@
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dest: /etc/etcd.env
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notify: restart etcd
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when: is_etcd_master
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- name: Refresh config | Create etcd-proxy config file
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template:
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src: etcd-proxy.j2
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dest: /etc/etcd-proxy.env
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notify: restart etcd-proxy
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when: is_etcd_proxy
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@ -1,120 +0,0 @@
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#!/bin/sh
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set -a
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### BEGIN INIT INFO
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# Provides: etcd-proxy
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# Required-Start: $local_fs $network $syslog
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# Required-Stop:
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: etcd-proxy
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# Description:
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# etcd-proxy is a proxy for etcd: distributed, consistent key-value store for shared configuration and service discovery
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### END INIT INFO
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PATH=/sbin:/usr/sbin:/bin/:/usr/bin
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DESC="etcd-proxy"
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NAME=etcd-proxy
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DAEMON={{ docker_bin_dir | default("/usr/bin") }}/docker
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DAEMON_EXEC=`basename $DAEMON`
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DAEMON_ARGS="run --restart=always --env-file=/etc/etcd-proxy.env \
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--net=host \
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--stop-signal=SIGKILL \
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-v /usr/share/ca-certificates/:/etc/ssl/certs:ro \
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--name={{ etcd_proxy_member_name | default("etcd-proxy") }} \
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{{ etcd_image_repo }}:{{ etcd_image_tag }} \
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{% if etcd_after_v3 %}
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{{ etcd_container_bin_dir }}etcd
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{% endif %}"
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SCRIPTNAME=/etc/init.d/$NAME
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DAEMON_USER=root
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STOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"
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PID=/var/run/etcd-proxy.pid
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# Exit if the binary is not present
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[ -x "$DAEMON" ] || exit 0
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
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# and status_of_proc is working.
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. /lib/lsb/init-functions
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do_status()
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{
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status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?
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}
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# Function that starts the daemon/service
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#
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do_start()
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{
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{{ docker_bin_dir | default("/usr/bin") }}/docker rm -f {{ etcd_proxy_member_name | default("etcd-proxy") }} &>/dev/null || true
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sleep 1
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start-stop-daemon --background --start --quiet --make-pidfile --pidfile $PID --user $DAEMON_USER --exec $DAEMON -- \
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$DAEMON_ARGS \
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|| return 2
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}
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#
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# Function that stops the daemon/service
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#
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do_stop()
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{
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start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $DAEMON_EXEC
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RETVAL="$?"
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sleep 1
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return "$RETVAL"
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}
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case "$1" in
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start)
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log_daemon_msg "Starting $DESC" "$NAME"
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do_start
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case "$?" in
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0|1) log_end_msg 0 || exit 0 ;;
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2) log_end_msg 1 || exit 1 ;;
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esac
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;;
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stop)
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log_daemon_msg "Stopping $DESC" "$NAME"
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if do_stop; then
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log_end_msg 0
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else
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log_failure_msg "Can't stop etcd-proxy"
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log_end_msg 1
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fi
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;;
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status)
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if do_status; then
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log_end_msg 0
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else
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log_failure_msg "etcd-proxy is not running"
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log_end_msg 1
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fi
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;;
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restart|force-reload)
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log_daemon_msg "Restarting $DESC" "$NAME"
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if do_stop; then
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if do_start; then
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log_end_msg 0
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exit 0
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else
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rc="$?"
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fi
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else
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rc="$?"
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fi
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log_failure_msg "Can't restart etcd-proxy"
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log_end_msg ${rc}
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;;
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*)
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echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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exit 3
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;;
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esac
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@ -1,110 +0,0 @@
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#!/bin/sh
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set -a
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### BEGIN INIT INFO
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# Provides: etcd-proxy
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# Required-Start: $local_fs $network $syslog
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# Required-Stop:
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: etcd-proxy
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# Description:
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# etcd-proxy is a proxy for etcd: distributed, consistent key-value store for shared configuration and service discovery
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### END INIT INFO
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PATH=/sbin:/usr/sbin:/bin:/usr/bin
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DESC="etcd-proxy"
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NAME=etcd-proxy
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DAEMON={{ bin_dir }}/etcd
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DAEMON_ARGS=""
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SCRIPTNAME=/etc/init.d/$NAME
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DAEMON_USER=etcd
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STOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"
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PID=/var/run/etcd-proxy.pid
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# Exit if the binary is not present
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[ -x "$DAEMON" ] || exit 0
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# Read configuration variable file if it is present
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[ -f /etc/etcd-proxy.env ] && . /etc/etcd-proxy.env
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# Define LSB log_* functions.
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# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
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# and status_of_proc is working.
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. /lib/lsb/init-functions
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do_status()
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{
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status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?
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}
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# Function that starts the daemon/service
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#
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do_start()
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{
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start-stop-daemon --background --start --quiet --make-pidfile --pidfile $PID --user $DAEMON_USER --exec $DAEMON -- \
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$DAEMON_ARGS \
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|| return 2
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}
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#
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# Function that stops the daemon/service
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#
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do_stop()
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{
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start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAME
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RETVAL="$?"
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sleep 1
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return "$RETVAL"
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}
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case "$1" in
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start)
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log_daemon_msg "Starting $DESC" "$NAME"
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do_start
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case "$?" in
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0|1) log_end_msg 0 || exit 0 ;;
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2) log_end_msg 1 || exit 1 ;;
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esac
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;;
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stop)
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log_daemon_msg "Stopping $DESC" "$NAME"
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if do_stop; then
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log_end_msg 0
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else
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log_failure_msg "Can't stop etcd-proxy"
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log_end_msg 1
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fi
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;;
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status)
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if do_status; then
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log_end_msg 0
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else
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log_failure_msg "etcd-proxy is not running"
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log_end_msg 1
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fi
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;;
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restart|force-reload)
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log_daemon_msg "Restarting $DESC" "$NAME"
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if do_stop; then
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if do_start; then
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log_end_msg 0
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exit 0
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else
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rc="$?"
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fi
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else
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rc="$?"
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fi
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log_failure_msg "Can't restart etcd-proxy"
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log_end_msg ${rc}
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;;
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*)
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echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
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exit 3
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;;
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esac
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@ -1,28 +0,0 @@
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[Unit]
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Description=etcd-proxy docker wrapper
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Wants=docker.socket
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After=docker.service
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[Service]
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User=root
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PermissionsStartOnly=true
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ExecStart={{ docker_bin_dir | default("/usr/bin") }}/docker run --restart=always \
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--env-file=/etc/etcd-proxy.env \
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{# TODO(mattymo): Allow docker IP binding and disable in envfile
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-p 2380:2380 -p 2379:2379 #}
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--net=host \
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--stop-signal=SIGKILL \
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-v /usr/share/ca-certificates/:/etc/ssl/certs:ro \
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--name={{ etcd_proxy_member_name | default("etcd-proxy") }} \
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{{ etcd_image_repo }}:{{ etcd_image_tag }} \
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{% if etcd_after_v3 %}
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{{ etcd_container_bin_dir }}etcd
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{% endif %}
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ExecStartPre=-{{ docker_bin_dir | default("/usr/bin") }}/docker rm -f {{ etcd_proxy_member_name | default("etcd-proxy") }}
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ExecReload={{ docker_bin_dir | default("/usr/bin") }}/docker restart {{ etcd_proxy_member_name | default("etcd-proxy") }}
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ExecStop={{ docker_bin_dir | default("/usr/bin") }}/docker stop {{ etcd_proxy_member_name | default("etcd-proxy") }}
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Restart=always
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RestartSec=15s
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[Install]
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WantedBy=multi-user.target
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@ -1,19 +0,0 @@
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[Unit]
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Description=etcd-proxy
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After=network.target
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[Service]
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Type=notify
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User=etcd
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PermissionsStartOnly=true
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EnvironmentFile=/etc/etcd-proxy.env
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ExecStart={{ bin_dir }}/etcd
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ExecStartPre=/bin/mkdir -p /var/lib/etcd-proxy
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ExecStartPre=/bin/chown -R etcd: /var/lib/etcd-proxy
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NotifyAccess=all
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Restart=always
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RestartSec=10s
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LimitNOFILE=40000
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[Install]
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WantedBy=multi-user.target
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@ -1,5 +0,0 @@
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ETCD_DATA_DIR=/var/lib/etcd-proxy
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ETCD_PROXY=on
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ETCD_LISTEN_CLIENT_URLS={{ etcd_access_endpoint }}
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ETCD_NAME={{ etcd_proxy_member_name | default("etcd-proxy") }}
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ETCD_INITIAL_CLUSTER={{ etcd_peer_addresses }}
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@ -3,11 +3,7 @@ ETCD_ADVERTISE_CLIENT_URLS={{ etcd_client_url }}
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ETCD_INITIAL_ADVERTISE_PEER_URLS={{ etcd_peer_url }}
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ETCD_INITIAL_CLUSTER_STATE={% if etcd_cluster_is_healthy.rc != 0 | bool %}new{% else %}existing{% endif %}
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{% if not is_etcd_proxy %}
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ETCD_LISTEN_CLIENT_URLS=http://{{ etcd_address }}:2379,http://127.0.0.1:2379
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{% else %}
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ETCD_LISTEN_CLIENT_URLS=http://{{ etcd_address }}:2379
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{% endif %}
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ETCD_ELECTION_TIMEOUT=10000
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ETCD_INITIAL_CLUSTER_TOKEN=k8s_etcd
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ETCD_LISTEN_PEER_URLS=http://{{ etcd_address }}:2380
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@ -26,7 +26,7 @@ spec:
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image: calico/kube-policy-controller:latest
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env:
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- name: ETCD_ENDPOINTS
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value: "{{ etcd_endpoint }}"
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value: "{{ etcd_access_endpoint }}"
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# Location of the Kubernetes API - this shouldn't need to be
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# changed so long as it is used in conjunction with
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# CONFIGURE_ETC_HOSTS="true".
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@ -38,3 +38,12 @@ spec:
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# This removes the need for KubeDNS to resolve the Service.
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- name: CONFIGURE_ETC_HOSTS
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value: "true"
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volumeMounts:
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- mountPath: {{ etcd_cert_dir }}
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name: etcd-certs
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readOnly: true
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volumes:
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- hostPath:
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path: {{ etcd_cert_dir }}
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name: etcd-certs
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@ -14,12 +14,3 @@
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name: kube-apiserver
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state: stopped
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when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))
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- name: "Pre-upgrade | remove kube-apiserver service definition"
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file:
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path: "{{ item }}"
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state: absent
|
||||
when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))
|
||||
with_items:
|
||||
- /etc/systemd/system/kube-apiserver.service
|
||||
- /etc/init.d/kube-apiserver
|
||||
|
|
|
@ -62,3 +62,4 @@ spec:
|
|||
- hostPath:
|
||||
path: /var/log/
|
||||
name: logfile
|
||||
|
||||
|
|
|
@ -1,6 +1,7 @@
|
|||
{
|
||||
"name": "calico-k8s-network",
|
||||
"type": "calico",
|
||||
"etcd_endpoints": "{{ etcd_access_endpoint }}",
|
||||
"log_level": "info",
|
||||
"ipam": {
|
||||
"type": "calico-ipam"
|
||||
|
|
|
@ -45,3 +45,6 @@ openstack_username: "{{ lookup('env','OS_USERNAME') }}"
|
|||
openstack_password: "{{ lookup('env','OS_PASSWORD') }}"
|
||||
openstack_region: "{{ lookup('env','OS_REGION_NAME') }}"
|
||||
openstack_tenant_id: "{{ lookup('env','OS_TENANT_ID') }}"
|
||||
|
||||
# All clients access each node individually, instead of using a load balancer.
|
||||
etcd_multiaccess: true
|
||||
|
|
|
@ -30,7 +30,7 @@
|
|||
- set_fact:
|
||||
etcd_access_addresses: |-
|
||||
{% for item in groups['etcd'] -%}
|
||||
http://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2379{% if not loop.last %},{% endif %}
|
||||
http://{{ item }}:2379{% if not loop.last %},{% endif %}
|
||||
{%- endfor %}
|
||||
- set_fact: etcd_access_endpoint="{% if etcd_multiaccess %}{{ etcd_access_addresses }}{% else %}{{ etcd_endpoint }}{% endif %}"
|
||||
- set_fact:
|
||||
|
@ -43,13 +43,6 @@
|
|||
{% for item in groups['etcd'] -%}
|
||||
{{ "etcd"+loop.index|string }}=http://{{ hostvars[item].access_ip | default(hostvars[item].ip | default(hostvars[item].ansible_default_ipv4['address'])) }}:2380{% if not loop.last %},{% endif %}
|
||||
{%- endfor %}
|
||||
- set_fact:
|
||||
etcd_proxy_member_name: |-
|
||||
{% for host in groups['k8s-cluster'] %}
|
||||
{% if inventory_hostname == host %}{{"etcd-proxy"+loop.index|string }}{% endif %}
|
||||
{% endfor %}
|
||||
- set_fact:
|
||||
is_etcd_proxy: "{{ inventory_hostname in groups['k8s-cluster'] }}"
|
||||
- set_fact:
|
||||
is_etcd_master: "{{ inventory_hostname in groups['etcd'] }}"
|
||||
- set_fact:
|
||||
|
|
|
@ -43,17 +43,21 @@
|
|||
- name: Calico | wait for etcd
|
||||
uri: url=http://localhost:2379/health
|
||||
register: result
|
||||
until: result.status == 200
|
||||
until: result.status == 200 or result.status == 401
|
||||
retries: 10
|
||||
delay: 5
|
||||
when: inventory_hostname in groups['kube-master']
|
||||
delegate_to: "{{groups['etcd'][0]}}"
|
||||
run_once: true
|
||||
|
||||
- name: Calico | Check if calico network pool has already been configured
|
||||
uri:
|
||||
url: "{{ etcd_endpoint }}/v2/keys/calico/v1/ipam/v4/pool"
|
||||
return_content: yes
|
||||
status_code: 200,404
|
||||
command: |-
|
||||
curl \
|
||||
--cacert {{ etcd_cert_dir }}/ca.pem \
|
||||
--cert {{ etcd_cert_dir}}/admin.pem \
|
||||
--key {{ etcd_cert_dir }}/admin-key.pem \
|
||||
https://localhost:2379/v2/keys/calico/v1/ipam/v4/pool
|
||||
register: calico_conf
|
||||
delegate_to: "{{groups['etcd'][0]}}"
|
||||
run_once: true
|
||||
|
||||
- name: Calico | Define ipip pool argument
|
||||
|
@ -79,21 +83,25 @@
|
|||
environment:
|
||||
NO_DEFAULT_POOLS: true
|
||||
run_once: true
|
||||
when: calico_conf.status == 404 or "nodes" not in calico_conf.content
|
||||
when: '"Key not found" in calico_conf.stdout or "nodes" not in calico_conf.stdout'
|
||||
|
||||
- name: Calico | Get calico configuration from etcd
|
||||
uri:
|
||||
url: "{{ etcd_endpoint }}/v2/keys/calico/v1/ipam/v4/pool"
|
||||
return_content: yes
|
||||
register: calico_pools
|
||||
command: |-
|
||||
curl http://localhost:2379/v2/keys/calico/v1/ipam/v4/pool
|
||||
register: calico_pools_raw
|
||||
delegate_to: "{{groups['etcd'][0]}}"
|
||||
run_once: true
|
||||
|
||||
- set_fact:
|
||||
calico_pools: "{{ calico_pools_raw.stdout | from_json }}"
|
||||
run_once: true
|
||||
|
||||
- name: Calico | Check if calico pool is properly configured
|
||||
fail:
|
||||
msg: 'Only one network pool must be configured and it must be the subnet {{ kube_pods_subnet }}.
|
||||
Please erase calico configuration and run the playbook again ("etcdctl rm --recursive /calico/v1/ipam/v4/pool")'
|
||||
when: ( calico_pools.json['node']['nodes'] | length > 1 ) or
|
||||
( not calico_pools.json['node']['nodes'][0]['key'] | search(".*{{ kube_pods_subnet | ipaddr('network') }}.*") )
|
||||
when: ( calico_pools['node']['nodes'] | length > 1 ) or
|
||||
( not calico_pools['node']['nodes'][0]['key'] | search(".*{{ kube_pods_subnet | ipaddr('network') }}.*") )
|
||||
run_once: true
|
||||
|
||||
- name: Calico | Write /etc/network-environment
|
||||
|
@ -131,4 +139,3 @@
|
|||
shell: "{{ bin_dir }}/calicoctl node bgp peer add {{ item.router_id }} as {{ item.as }}"
|
||||
with_items: peers
|
||||
when: peer_with_router|default(false) and inventory_hostname in groups['kube-node']
|
||||
|
||||
|
|
|
@ -1,8 +1,8 @@
|
|||
[Unit]
|
||||
Description=Calico per-node agent
|
||||
Documentation=https://github.com/projectcalico/calico-docker
|
||||
After=docker.service docker.socket etcd-proxy.service
|
||||
Wants=docker.socket etcd-proxy.service
|
||||
After=docker.service docker.socket
|
||||
Wants=docker.socket
|
||||
|
||||
[Service]
|
||||
User=root
|
||||
|
|
|
@ -1,6 +1,7 @@
|
|||
#!/bin/bash
|
||||
/usr/bin/docker run --privileged --rm \
|
||||
--net=host --pid=host -e ETCD_AUTHORITY={{ etcd_authority }} \
|
||||
--net=host --pid=host \
|
||||
-e ETCD_ENDPOINTS={{ etcd_access_endpoint }} \
|
||||
-v /usr/bin/docker:/usr/bin/docker \
|
||||
-v /var/run/docker.sock:/var/run/docker.sock \
|
||||
-v /var/run/calico:/var/run/calico \
|
||||
|
|
|
@ -3,7 +3,7 @@
|
|||
DEFAULT_IPV4={{ip | default(ansible_default_ipv4.address) }}
|
||||
|
||||
# The Kubernetes master IP
|
||||
KUBERNETES_MASTER={{ first_kube_master }}
|
||||
KUBERNETES_MASTER={{ kube_apiserver_endpoint }}
|
||||
|
||||
# IP and port of etcd instance used by Calico
|
||||
ETCD_AUTHORITY={{ etcd_authority }}
|
||||
ETCD_ENDPOINTS={{ etcd_access_endpoint }}
|
||||
|
|
|
@ -21,7 +21,7 @@
|
|||
args:
|
||||
- "--network-config=/etc/flannel-network.json"
|
||||
- "--etcd-prefix=/{{ cluster_name }}/network"
|
||||
- "--etcd-server={{ etcd_endpoint }}"
|
||||
- "--etcd-endpoints={{ etcd_access_endpoint }}"
|
||||
volumeMounts:
|
||||
- name: "networkconfig"
|
||||
mountPath: "/etc/flannel-network.json"
|
||||
|
|
Loading…
Reference in a new issue