mirror of
https://github.com/helm/charts.git
synced 2026-08-23 22:37:45 +00:00
[stable/redis-ha] on updates ensure that redis and haproxy are only restarted if their specific config changed (#17444)
Signed-off-by: Olaf Klischat <o.klischat@syseleven.de>
This commit is contained in:
Olaf Klischat
committed by
Kubernetes Prow Robot
Kubernetes Prow Robot
parent
9dafb9fb64
commit
bc49b4a9a1
@@ -6,7 +6,7 @@ keywords:
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- redis
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- keyvalue
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- database
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version: 3.7.12
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version: 3.7.13
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appVersion: 5.0.5
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description: Highly available Kubernetes implementation of Redis
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icon: https://upload.wikimedia.org/wikipedia/en/thumb/6/6b/Redis_Logo.svg/1200px-Redis_Logo.svg.png
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@@ -0,0 +1,237 @@
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{{/* vim: set filetype=mustache: */}}
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{{- define "config-redis.conf" }}
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{{- if .Values.redis.customConfig }}
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{{ tpl .Values.redis.customConfig . | indent 4 }}
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{{- else }}
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dir "/data"
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port {{ .Values.redis.port }}
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{{- range $key, $value := .Values.redis.config }}
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{{ $key }} {{ $value }}
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{{- end }}
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{{- if .Values.auth }}
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requirepass replace-default-auth
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masterauth replace-default-auth
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{{- end }}
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{{- end }}
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{{- end }}
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{{- define "config-sentinel.conf" }}
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{{- if .Values.sentinel.customConfig }}
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{{ tpl .Values.sentinel.customConfig . | indent 4 }}
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{{- else }}
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dir "/data"
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{{- $root := . -}}
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{{- range $key, $value := .Values.sentinel.config }}
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sentinel {{ $key }} {{ $root.Values.redis.masterGroupName }} {{ $value }}
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{{- end }}
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{{- if .Values.auth }}
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sentinel auth-pass {{ .Values.redis.masterGroupName }} replace-default-auth
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{{- end }}
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{{- end }}
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{{- end }}
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{{- define "config-init.sh" }}
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HOSTNAME="$(hostname)"
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INDEX="${HOSTNAME##*-}"
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MASTER="$(redis-cli -h {{ template "redis-ha.fullname" . }} -p {{ .Values.sentinel.port }} sentinel get-master-addr-by-name {{ .Values.redis.masterGroupName }} | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')"
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MASTER_GROUP="{{ .Values.redis.masterGroupName }}"
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QUORUM="{{ .Values.sentinel.quorum }}"
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REDIS_CONF=/data/conf/redis.conf
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REDIS_PORT={{ .Values.redis.port }}
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SENTINEL_CONF=/data/conf/sentinel.conf
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SENTINEL_PORT={{ .Values.sentinel.port }}
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SERVICE={{ template "redis-ha.fullname" . }}
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set -eu
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sentinel_update() {
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echo "Updating sentinel config with master $MASTER"
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eval MY_SENTINEL_ID="\${SENTINEL_ID_$INDEX}"
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sed -i "1s/^/sentinel myid $MY_SENTINEL_ID\\n/" "$SENTINEL_CONF"
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sed -i "2s/^/sentinel monitor $MASTER_GROUP $1 $REDIS_PORT $QUORUM \\n/" "$SENTINEL_CONF"
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echo "sentinel announce-ip $ANNOUNCE_IP" >> $SENTINEL_CONF
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echo "sentinel announce-port $SENTINEL_PORT" >> $SENTINEL_CONF
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}
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redis_update() {
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echo "Updating redis config"
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echo "slaveof $1 $REDIS_PORT" >> "$REDIS_CONF"
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echo "slave-announce-ip $ANNOUNCE_IP" >> $REDIS_CONF
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echo "slave-announce-port $REDIS_PORT" >> $REDIS_CONF
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}
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copy_config() {
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cp /readonly-config/redis.conf "$REDIS_CONF"
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cp /readonly-config/sentinel.conf "$SENTINEL_CONF"
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}
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setup_defaults() {
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echo "Setting up defaults"
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if [ "$INDEX" = "0" ]; then
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echo "Setting this pod as the default master"
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redis_update "$ANNOUNCE_IP"
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sentinel_update "$ANNOUNCE_IP"
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sed -i "s/^.*slaveof.*//" "$REDIS_CONF"
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else
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DEFAULT_MASTER="$(getent hosts "$SERVICE-announce-0" | awk '{ print $1 }')"
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if [ -z "$DEFAULT_MASTER" ]; then
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echo "Unable to resolve host"
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exit 1
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fi
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echo "Setting default slave config.."
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redis_update "$DEFAULT_MASTER"
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sentinel_update "$DEFAULT_MASTER"
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fi
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}
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find_master() {
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echo "Attempting to find master"
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if [ "$(redis-cli -h "$MASTER"{{ if .Values.auth }} -a "$AUTH"{{ end }} ping)" != "PONG" ]; then
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echo "Can't ping master, attempting to force failover"
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if redis-cli -h "$SERVICE" -p "$SENTINEL_PORT" sentinel failover "$MASTER_GROUP" | grep -q 'NOGOODSLAVE' ; then
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setup_defaults
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return 0
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fi
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sleep 10
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MASTER="$(redis-cli -h $SERVICE -p $SENTINEL_PORT sentinel get-master-addr-by-name $MASTER_GROUP | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')"
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if [ "$MASTER" ]; then
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sentinel_update "$MASTER"
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redis_update "$MASTER"
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else
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echo "Could not failover, exiting..."
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exit 1
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fi
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else
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echo "Found reachable master, updating config"
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sentinel_update "$MASTER"
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redis_update "$MASTER"
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fi
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}
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mkdir -p /data/conf/
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echo "Initializing config.."
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copy_config
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ANNOUNCE_IP=$(getent hosts "$SERVICE-announce-$INDEX" | awk '{ print $1 }')
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if [ -z "$ANNOUNCE_IP" ]; then
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"Could not resolve the announce ip for this pod"
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exit 1
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elif [ "$MASTER" ]; then
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find_master
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else
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setup_defaults
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fi
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if [ "${AUTH:-}" ]; then
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echo "Setting auth values"
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ESCAPED_AUTH=$(echo "$AUTH" | sed -e 's/[\/&]/\\&/g');
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sed -i "s/replace-default-auth/${ESCAPED_AUTH}/" "$REDIS_CONF" "$SENTINEL_CONF"
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fi
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echo "Ready..."
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{{- end }}
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{{- define "config-haproxy.cfg" }}
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{{- if .Values.haproxy.customConfig }}
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{{ .Values.haproxy.customConfig | indent 4}}
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{{- else }}
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defaults REDIS
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mode tcp
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timeout connect {{ .Values.haproxy.timeout.connect }}
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timeout server {{ .Values.haproxy.timeout.server }}
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timeout client {{ .Values.haproxy.timeout.client }}
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listen health_check_http_url
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bind :8888
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mode http
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monitor-uri /healthz
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option dontlognull
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{{- $root := . }}
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{{- $fullName := include "redis-ha.fullname" . }}
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{{- $replicas := int .Values.replicas }}
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{{- range $i := until $replicas }}
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# Check Sentinel and whether they are nominated master
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backend check_if_redis_is_master_{{ $i }}
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mode tcp
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option tcp-check
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tcp-check connect
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{{- if $root.auth }}
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tcp-check send AUTH\ {{ $root.redisPassword }}\r\n
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tcp-check expect string +OK
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{{- end }}
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tcp-check send PING\r\n
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tcp-check expect string +PONG
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tcp-check send SENTINEL\ get-master-addr-by-name\ mymaster\r\n
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tcp-check expect string REPLACE_ANNOUNCE{{ $i }}
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tcp-check send QUIT\r\n
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tcp-check expect string +OK
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{{- range $i := until $replicas }}
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server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:26379 check inter 1s
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{{- end }}
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{{- end }}
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# decide redis backend to use
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#master
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frontend ft_redis_master
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bind *:{{ $root.Values.redis.port }}
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use_backend bk_redis_master
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{{ if .Values.haproxy.readOnly.enabled }}
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#slave
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frontend ft_redis_slave
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bind *:{{ .Values.haproxy.readOnly.port }}
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use_backend bk_redis_slave
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{{- end }}
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# Check all redis servers to see if they think they are master
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backend bk_redis_master
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mode tcp
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option tcp-check
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tcp-check connect
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{{- if .Values.auth }}
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tcp-check send AUTH\ {{ .Values.redisPassword }}\r\n
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tcp-check expect string +OK
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{{- end }}
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tcp-check send PING\r\n
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tcp-check expect string +PONG
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tcp-check send info\ replication\r\n
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tcp-check expect string role:master
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tcp-check send QUIT\r\n
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tcp-check expect string +OK
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{{- range $i := until $replicas }}
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use-server R{{ $i }} if { srv_is_up(R{{ $i }}) } { nbsrv(check_if_redis_is_master_{{ $i }}) ge 2 }
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server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:{{ $root.Values.redis.port }} check inter 1s fall 1 rise 1
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{{- end }}
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{{ if .Values.haproxy.readOnly.enabled }}
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backend bk_redis_slave
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mode tcp
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option tcp-check
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tcp-check connect
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{{- if .Values.auth }}
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tcp-check send AUTH\ {{ .Values.redisPassword }}\r\n
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tcp-check expect string +OK
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{{- end }}
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tcp-check send PING\r\n
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tcp-check expect string +PONG
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tcp-check send info\ replication\r\n
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tcp-check expect string role:slave
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tcp-check send QUIT\r\n
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tcp-check expect string +OK
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{{- range $i := until $replicas }}
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server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:{{ $root.Values.redis.port }} check inter 1s fall 1 rise 1
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{{- end }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{- define "config-haproxy_init.sh" }}
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HAPROXY_CONF=/data/haproxy.cfg
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cp /readonly/haproxy.cfg "$HAPROXY_CONF"
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{{- $fullName := include "redis-ha.fullname" . }}
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{{- $replicas := int .Values.replicas }}
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{{- range $i := until $replicas }}
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ANNOUNCE_IP{{ $i }}=$(getent hosts "{{ $fullName }}-announce-{{ $i }}" | awk '{ print $1 }')
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sed -i "s/REPLACE_ANNOUNCE{{ $i }}/$ANNOUNCE_IP{{ $i }}/" "$HAPROXY_CONF"
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{{- end }}
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{{- end }}
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@@ -9,231 +9,16 @@ metadata:
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app: {{ template "redis-ha.fullname" . }}
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data:
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redis.conf: |
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{{- if .Values.redis.customConfig }}
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{{ tpl .Values.redis.customConfig . | indent 4 }}
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{{- else }}
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dir "/data"
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port {{ .Values.redis.port }}
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{{- range $key, $value := .Values.redis.config }}
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{{ $key }} {{ $value }}
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{{- end }}
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{{- if .Values.auth }}
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requirepass replace-default-auth
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masterauth replace-default-auth
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{{- end }}
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{{- end }}
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{{- include "config-redis.conf" . }}
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sentinel.conf: |
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{{- if .Values.sentinel.customConfig }}
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{{ tpl .Values.sentinel.customConfig . | indent 4 }}
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{{- else }}
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dir "/data"
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{{- $root := . -}}
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{{- range $key, $value := .Values.sentinel.config }}
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sentinel {{ $key }} {{ $root.Values.redis.masterGroupName }} {{ $value }}
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{{- end }}
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{{- if .Values.auth }}
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sentinel auth-pass {{ .Values.redis.masterGroupName }} replace-default-auth
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{{- end }}
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{{- end }}
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{{- include "config-sentinel.conf" . }}
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init.sh: |
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HOSTNAME="$(hostname)"
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INDEX="${HOSTNAME##*-}"
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MASTER="$(redis-cli -h {{ template "redis-ha.fullname" . }} -p {{ .Values.sentinel.port }} sentinel get-master-addr-by-name {{ .Values.redis.masterGroupName }} | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')"
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MASTER_GROUP="{{ .Values.redis.masterGroupName }}"
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QUORUM="{{ .Values.sentinel.quorum }}"
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REDIS_CONF=/data/conf/redis.conf
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REDIS_PORT={{ .Values.redis.port }}
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SENTINEL_CONF=/data/conf/sentinel.conf
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SENTINEL_PORT={{ .Values.sentinel.port }}
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SERVICE={{ template "redis-ha.fullname" . }}
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set -eu
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sentinel_update() {
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echo "Updating sentinel config with master $MASTER"
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eval MY_SENTINEL_ID="\${SENTINEL_ID_$INDEX}"
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sed -i "1s/^/sentinel myid $MY_SENTINEL_ID\\n/" "$SENTINEL_CONF"
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sed -i "2s/^/sentinel monitor $MASTER_GROUP $1 $REDIS_PORT $QUORUM \\n/" "$SENTINEL_CONF"
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echo "sentinel announce-ip $ANNOUNCE_IP" >> $SENTINEL_CONF
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echo "sentinel announce-port $SENTINEL_PORT" >> $SENTINEL_CONF
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}
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redis_update() {
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echo "Updating redis config"
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echo "slaveof $1 $REDIS_PORT" >> "$REDIS_CONF"
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echo "slave-announce-ip $ANNOUNCE_IP" >> $REDIS_CONF
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echo "slave-announce-port $REDIS_PORT" >> $REDIS_CONF
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}
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copy_config() {
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cp /readonly-config/redis.conf "$REDIS_CONF"
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cp /readonly-config/sentinel.conf "$SENTINEL_CONF"
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}
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setup_defaults() {
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echo "Setting up defaults"
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if [ "$INDEX" = "0" ]; then
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echo "Setting this pod as the default master"
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redis_update "$ANNOUNCE_IP"
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sentinel_update "$ANNOUNCE_IP"
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sed -i "s/^.*slaveof.*//" "$REDIS_CONF"
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else
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DEFAULT_MASTER="$(getent hosts "$SERVICE-announce-0" | awk '{ print $1 }')"
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if [ -z "$DEFAULT_MASTER" ]; then
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echo "Unable to resolve host"
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exit 1
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fi
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echo "Setting default slave config.."
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redis_update "$DEFAULT_MASTER"
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sentinel_update "$DEFAULT_MASTER"
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fi
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}
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find_master() {
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echo "Attempting to find master"
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if [ "$(redis-cli -h "$MASTER"{{ if .Values.auth }} -a "$AUTH"{{ end }} ping)" != "PONG" ]; then
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echo "Can't ping master, attempting to force failover"
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if redis-cli -h "$SERVICE" -p "$SENTINEL_PORT" sentinel failover "$MASTER_GROUP" | grep -q 'NOGOODSLAVE' ; then
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setup_defaults
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return 0
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fi
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sleep 10
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MASTER="$(redis-cli -h $SERVICE -p $SENTINEL_PORT sentinel get-master-addr-by-name $MASTER_GROUP | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')"
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if [ "$MASTER" ]; then
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sentinel_update "$MASTER"
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redis_update "$MASTER"
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else
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echo "Could not failover, exiting..."
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exit 1
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fi
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else
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echo "Found reachable master, updating config"
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sentinel_update "$MASTER"
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redis_update "$MASTER"
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fi
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}
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mkdir -p /data/conf/
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echo "Initializing config.."
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copy_config
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ANNOUNCE_IP=$(getent hosts "$SERVICE-announce-$INDEX" | awk '{ print $1 }')
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if [ -z "$ANNOUNCE_IP" ]; then
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"Could not resolve the announce ip for this pod"
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exit 1
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elif [ "$MASTER" ]; then
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find_master
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else
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setup_defaults
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fi
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if [ "${AUTH:-}" ]; then
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echo "Setting auth values"
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ESCAPED_AUTH=$(echo "$AUTH" | sed -e 's/[\/&]/\\&/g');
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sed -i "s/replace-default-auth/${ESCAPED_AUTH}/" "$REDIS_CONF" "$SENTINEL_CONF"
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fi
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echo "Ready..."
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{{- include "config-init.sh" . }}
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{{ if .Values.haproxy.enabled }}
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haproxy.cfg: |-
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{{- if .Values.haproxy.customConfig }}
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{{ .Values.haproxy.customConfig | indent 4}}
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{{- else }}
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defaults REDIS
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mode tcp
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timeout connect {{ .Values.haproxy.timeout.connect }}
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timeout server {{ .Values.haproxy.timeout.server }}
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timeout client {{ .Values.haproxy.timeout.client }}
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listen health_check_http_url
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bind :8888
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mode http
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monitor-uri /healthz
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option dontlognull
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{{- $root := . }}
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{{- $fullName := include "redis-ha.fullname" . }}
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{{- $replicas := int .Values.replicas }}
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{{- range $i := until $replicas }}
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# Check Sentinel and whether they are nominated master
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backend check_if_redis_is_master_{{ $i }}
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mode tcp
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option tcp-check
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tcp-check connect
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{{- if $root.auth }}
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tcp-check send AUTH\ {{ $root.redisPassword }}\r\n
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tcp-check expect string +OK
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{{- end }}
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tcp-check send PING\r\n
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tcp-check expect string +PONG
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tcp-check send SENTINEL\ get-master-addr-by-name\ mymaster\r\n
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tcp-check expect string REPLACE_ANNOUNCE{{ $i }}
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tcp-check send QUIT\r\n
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tcp-check expect string +OK
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{{- range $i := until $replicas }}
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server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:26379 check inter 1s
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{{- end }}
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{{- end }}
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# decide redis backend to use
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#master
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||||
frontend ft_redis_master
|
||||
bind *:{{ $root.Values.redis.port }}
|
||||
use_backend bk_redis_master
|
||||
{{ if .Values.haproxy.readOnly.enabled }}
|
||||
#slave
|
||||
frontend ft_redis_slave
|
||||
bind *:{{ .Values.haproxy.readOnly.port }}
|
||||
use_backend bk_redis_slave
|
||||
{{- end }}
|
||||
# Check all redis servers to see if they think they are master
|
||||
backend bk_redis_master
|
||||
mode tcp
|
||||
option tcp-check
|
||||
tcp-check connect
|
||||
{{- if .Values.auth }}
|
||||
tcp-check send AUTH\ {{ .Values.redisPassword }}\r\n
|
||||
tcp-check expect string +OK
|
||||
{{- end }}
|
||||
tcp-check send PING\r\n
|
||||
tcp-check expect string +PONG
|
||||
tcp-check send info\ replication\r\n
|
||||
tcp-check expect string role:master
|
||||
tcp-check send QUIT\r\n
|
||||
tcp-check expect string +OK
|
||||
{{- range $i := until $replicas }}
|
||||
use-server R{{ $i }} if { srv_is_up(R{{ $i }}) } { nbsrv(check_if_redis_is_master_{{ $i }}) ge 2 }
|
||||
server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:{{ $root.Values.redis.port }} check inter 1s fall 1 rise 1
|
||||
{{- end }}
|
||||
{{ if .Values.haproxy.readOnly.enabled }}
|
||||
backend bk_redis_slave
|
||||
mode tcp
|
||||
option tcp-check
|
||||
tcp-check connect
|
||||
{{- if .Values.auth }}
|
||||
tcp-check send AUTH\ {{ .Values.redisPassword }}\r\n
|
||||
tcp-check expect string +OK
|
||||
{{- end }}
|
||||
tcp-check send PING\r\n
|
||||
tcp-check expect string +PONG
|
||||
tcp-check send info\ replication\r\n
|
||||
tcp-check expect string role:slave
|
||||
tcp-check send QUIT\r\n
|
||||
tcp-check expect string +OK
|
||||
{{- range $i := until $replicas }}
|
||||
server R{{ $i }} {{ $fullName }}-announce-{{ $i }}:{{ $root.Values.redis.port }} check inter 1s fall 1 rise 1
|
||||
{{- end }}
|
||||
{{- end }}
|
||||
{{- include "config-haproxy.cfg" . }}
|
||||
{{- end }}
|
||||
{{- end }}
|
||||
haproxy_init.sh: |
|
||||
HAPROXY_CONF=/data/haproxy.cfg
|
||||
cp /readonly/haproxy.cfg "$HAPROXY_CONF"
|
||||
{{- $fullName := include "redis-ha.fullname" . }}
|
||||
{{- $replicas := int .Values.replicas }}
|
||||
{{- range $i := until $replicas }}
|
||||
ANNOUNCE_IP{{ $i }}=$(getent hosts "{{ $fullName }}-announce-{{ $i }}" | awk '{ print $1 }')
|
||||
sed -i "s/REPLACE_ANNOUNCE{{ $i }}/$ANNOUNCE_IP{{ $i }}/" "$HAPROXY_CONF"
|
||||
{{- end }}
|
||||
haproxy_init.sh: |
|
||||
{{- include "config-haproxy_init.sh" . }}
|
||||
|
||||
@@ -17,7 +17,7 @@ spec:
|
||||
template:
|
||||
metadata:
|
||||
annotations:
|
||||
checksum/init-config: {{ include (print $.Template.BasePath "/redis-ha-configmap.yaml") . | sha256sum }}
|
||||
checksum/init-config: {{ print (include "config-redis.conf" .) (include "config-init.sh" .) | sha256sum }}
|
||||
{{- if .Values.podAnnotations }}
|
||||
{{ toYaml .Values.podAnnotations | indent 8 }}
|
||||
{{- end }}
|
||||
|
||||
@@ -24,7 +24,7 @@ spec:
|
||||
prometheus.io/path: /metrics
|
||||
prometheus.io/port: "9101"
|
||||
prometheus.io/scrape: "true"
|
||||
checksum/config: {{ include (print $.Template.BasePath "/redis-ha-configmap.yaml") . | sha256sum }}
|
||||
checksum/config: {{ print (include "config-haproxy.cfg" .) (include "config-haproxy_init.sh" .) | sha256sum }}
|
||||
{{- if .Values.haproxy.annotations }}
|
||||
{{ toYaml .Values.haproxy.annotations | indent 8 }}
|
||||
{{- end }}
|
||||
|
||||
Reference in New Issue
Block a user