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|
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: {{ include "common.fullname" . }}
namespace: {{ include "common.namespace" . }}
labels:
app: {{ include "common.name" . }}
chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
spec:
serviceName: {{ .Values.service.name }}
replicas: {{ .Values.replicaCount }}
template:
metadata:
labels:
app: {{ include "common.name" . }}
release: {{ .Release.Name }}
spec:
initContainers:
#{{ if not .Values.disableNfsProvisioner }}
- name: {{ include "common.name" . }}-readiness
command:
- /root/ready.py
args:
- --container-name
- {{ .Values.nfsprovisionerPrefix }}-nfs-provisioner
env:
- name: NAMESPACE
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
image: "{{ .Values.global.readinessRepository }}/{{ .Values.global.readinessImage }}"
imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
#{{ end }}
- name: init-mysql
image: "{{ .Values.repository | default .Values.repository }}/{{ .Values.image }}"
imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
command:
- bash
- "-c"
- |
set -ex
# Generate mysql server-id from pod ordinal index.
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo BASH_REMATCH=${BASH_REMATCH}
echo [mysqld] > /mnt/conf.d/server-id.cnf
# Add an offset to avoid reserved server-id=0 value.
echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
# Copy appropriate conf.d files from config-map to emptyDir.
if [[ $ordinal -eq 0 ]]; then
cp /mnt/config-map/master.cnf /mnt/conf.d/
else
cp /mnt/config-map/slave.cnf /mnt/conf.d/
fi
volumeMounts:
- name: conf
mountPath: /mnt/conf.d
- name: config-map
mountPath: /mnt/config-map
- name: clone-mysql
image: "{{ .Values.global.xtrabackupRepository | default .Values.xtrabackupRepository }}/{{ .Values.xtrabackupImage }}"
imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: {{ template "common.fullname" . }}
key: db-root-password
command:
- bash
- "-c"
- |
set -ex
# Skip the clone if data already exists.
[[ -d /var/lib/mysql/mysql ]] && exit 0
# Skip the clone on master (ordinal index 0).
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo ${BASH_REMATCH}
[[ $ordinal -eq 0 ]] && exit 0
# Clone data from previous peer.
ncat --recv-only {{ template "common.name" . }}-$(($ordinal-1)).{{ .Values.service.name }}.{{ include "common.namespace" . }} 3307 | xbstream -x -C /var/lib/mysql
# Prepare the backup.
xtrabackup --user=root --password=$MYSQL_ROOT_PASSWORD --prepare --target-dir=/var/lib/mysql
ls -l /var/lib/mysql
volumeMounts:
- name: {{ include "common.fullname" . }}-data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
containers:
#sdnc-db-container
- name: {{ include "common.name" . }}
image: "{{ .Values.repository | default .Values.repository }}/{{ .Values.image }}"
imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
ports:
- containerPort: {{ .Values.service.internalPort }}
# disable liveness probe when breakpoints set in debugger
# so K8s doesn't restart unresponsive container
{{- if eq .Values.liveness.enabled true }}
livenessProbe:
exec:
command: ["mysqladmin", "ping"]
initialDelaySeconds: {{ .Values.liveness.initialDelaySeconds }}
periodSeconds: {{ .Values.liveness.periodSeconds }}
timeoutSeconds: {{ .Values.liveness.timeoutSeconds }}
{{end -}}
readinessProbe:
tcpSocket:
port: {{ .Values.service.internalPort }}
initialDelaySeconds: {{ .Values.readiness.initialDelaySeconds }}
periodSeconds: {{ .Values.readiness.periodSeconds }}
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: {{ template "common.fullname" . }}
key: db-root-password
- name: MYSQL_ROOT_HOST
value: '%'
- name: MYSQL_ALLOW_EMPTY_PASSWORD
value: {{ .Values.config.dbAllowEmptyPassword | default "0" | quote }}
volumeMounts:
- mountPath: /var/lib/mysql
name: {{ include "common.fullname" . }}-data
subPath: mysql
- mountPath: /etc/mysql/conf.d
name: conf
resources:
{{ toYaml .Values.resources | indent 12 }}
{{- if .Values.nodeSelector }}
nodeSelector:
{{ toYaml .Values.nodeSelector | indent 10 }}
{{- end -}}
{{- if .Values.affinity }}
affinity:
{{ toYaml .Values.affinity | indent 10 }}
{{- end }}
- name: xtrabackup
image: "{{ .Values.global.xtrabackupRepository | default .Values.xtrabackupRepository }}/{{ .Values.xtrabackupImage }}"
imagePullPolicy: {{ .Values.global.pullPolicy | default .Values.pullPolicy }}
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: {{ template "common.fullname" . }}
key: db-root-password
ports:
- containerPort: {{ .Values.xtrabackup.internalPort }}
name: xtrabackup
command:
- bash
- "-c"
- |
set -ex
cd /var/lib/mysql
ls -l
# Determine binlog position of cloned data, if any.
if [[ -f xtrabackup_slave_info ]]; then
echo "Inside xtrabackup_slave_info"
# XtraBackup already generated a partial "CHANGE MASTER TO" query
# because we're cloning from an existing slave.
mv xtrabackup_slave_info change_master_to.sql.in
# Ignore xtrabackup_binlog_info in this case (it's useless).
rm -f xtrabackup_binlog_info
elif [[ -f xtrabackup_binlog_info ]]; then
echo "Inside xtrabackup_binlog_info"
# We're cloning directly from master. Parse binlog position.
[[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
rm xtrabackup_binlog_info
echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}',\
MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in
fi
# Check if we need to complete a clone by starting replication.
if [[ -f change_master_to.sql.in ]]; then
echo "Waiting for mysqld to be ready (accepting connections)"
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo $ordinal
until mysql --user=root --password=$MYSQL_ROOT_PASSWORD -h localhost -e "SELECT 1"; do sleep 1; done
echo "Initializing replication from clone position"
# In case of container restart, attempt this at-most-once.
mv change_master_to.sql.in change_master_to.sql.orig
mysql --user=root --password=$MYSQL_ROOT_PASSWORD -h localhost <<EOF
$(<change_master_to.sql.orig),
MASTER_HOST="{{ template "common.name" . }}-0.{{ .Values.service.name }}.{{ include "common.namespace" . }}",
MASTER_USER="root",
MASTER_PASSWORD="$MYSQL_ROOT_PASSWORD",
MASTER_CONNECT_RETRY=10;
START SLAVE;
EOF
fi
# Start a server to send backups when requested by peers.
exec ncat --listen --keep-open --send-only --max-conns=1 3307 -c \
"xtrabackup --user=root --password=$MYSQL_ROOT_PASSWORD --backup --slave-info --stream=xbstream --host=localhost"
volumeMounts:
- name: {{ include "common.fullname" . }}-data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
volumes:
- name: conf
emptyDir: {}
- name: config-map
configMap:
name: {{ include "common.fullname" . }}-db-configmap
- name: localtime
hostPath:
path: /etc/localtime
- name: {{ include "common.fullname" . }}-data
#{{ if not .Values.disableNfsProvisioner }}
volumeClaimTemplates:
- metadata:
name: {{ include "common.fullname" . }}-data
annotations:
volume.beta.kubernetes.io/storage-class: "{{ include "common.fullname" . }}-data"
spec:
accessModes: ["ReadWriteMany"]
resources:
requests:
storage: 1Gi
#{{ else if .Values.persistence.enabled }}
persistentVolumeClaim:
claimName: {{ include "common.fullname" . }}-data
#{{ else }}
emptyDir: {}
#{{ end }}
|
