add docker

.gitignore

@@ -8,6 +8,7 @@ code/build
 *.class
 *.war
 code/logs
+code/code.iml
 
 # gradle
 code/.gradle

code/docker/zookeeper/Dockerfile

@@ -0,0 +1,56 @@
+FROM openjdk:8-jre-alpine
+
+# Install required packages
+RUN apk add --no-cache \
+    bash \
+    su-exec
+
+ENV ZOO_USER=zookeeper \
+    ZOO_CONF_DIR=/conf \
+    ZOO_DATA_DIR=/data \
+    ZOO_DATA_LOG_DIR=/datalog \
+    ZOO_PORT=2181 \
+    ZOO_TICK_TIME=2000 \
+    ZOO_INIT_LIMIT=5 \
+    ZOO_SYNC_LIMIT=2 \
+    ZOO_MAX_CLIENT_CNXNS=60
+
+# Add a user and make dirs
+RUN set -ex; \
+    adduser -D "$ZOO_USER"; \
+    mkdir -p "$ZOO_DATA_LOG_DIR" "$ZOO_DATA_DIR" "$ZOO_CONF_DIR"; \
+    chown "$ZOO_USER:$ZOO_USER" "$ZOO_DATA_LOG_DIR" "$ZOO_DATA_DIR" "$ZOO_CONF_DIR"
+
+ARG GPG_KEY=D0BC8D8A4E90A40AFDFC43B3E22A746A68E327C1
+ARG DISTRO_NAME=zookeeper-3.4.11
+
+# Download Apache Zookeeper, verify its PGP signature, untar and clean up
+RUN set -ex; \
+    apk add --no-cache --virtual .build-deps \
+        ca-certificates \
+        gnupg \
+        libressl; \
+    wget -q "https://www.apache.org/dist/zookeeper/$DISTRO_NAME/$DISTRO_NAME.tar.gz"; \
+    wget -q "https://www.apache.org/dist/zookeeper/$DISTRO_NAME/$DISTRO_NAME.tar.gz.asc"; \
+    export GNUPGHOME="$(mktemp -d)"; \
+    gpg --keyserver ha.pool.sks-keyservers.net --recv-key "$GPG_KEY" || \
+    gpg --keyserver pgp.mit.edu --recv-keys "$GPG_KEY" || \
+    gpg --keyserver keyserver.pgp.com --recv-keys "$GPG_KEY"; \
+    gpg --batch --verify "$DISTRO_NAME.tar.gz.asc" "$DISTRO_NAME.tar.gz"; \
+    tar -xzf "$DISTRO_NAME.tar.gz"; \
+    mv "$DISTRO_NAME/conf/"* "$ZOO_CONF_DIR"; \
+    rm -rf "$GNUPGHOME" "$DISTRO_NAME.tar.gz" "$DISTRO_NAME.tar.gz.asc"; \
+    apk del .build-deps
+
+WORKDIR $DISTRO_NAME
+VOLUME ["$ZOO_DATA_DIR", "$ZOO_DATA_LOG_DIR"]
+
+EXPOSE $ZOO_PORT 2888 3888
+
+ENV PATH=$PATH:/$DISTRO_NAME/bin \
+    ZOOCFGDIR=$ZOO_CONF_DIR
+
+COPY docker-entrypoint.sh /
+RUN chmod +x /docker-entrypoint.sh
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["zkServer.sh", "start-foreground"]

code/docker/zookeeper/docker-entrypoint.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -e
+
+# Allow the container to be started with `--user`
+if [[ "$1" = 'zkServer.sh' && "$(id -u)" = '0' ]]; then
+    chown -R "$ZOO_USER" "$ZOO_DATA_DIR" "$ZOO_DATA_LOG_DIR"
+    exec su-exec "$ZOO_USER" "$0" "$@"
+fi
+
+# Generate the config only if it doesn't exist
+if [[ ! -f "$ZOO_CONF_DIR/zoo.cfg" ]]; then
+    CONFIG="$ZOO_CONF_DIR/zoo.cfg"
+
+    echo "clientPort=$ZOO_PORT" >> "$CONFIG"
+    echo "dataDir=$ZOO_DATA_DIR" >> "$CONFIG"
+    echo "dataLogDir=$ZOO_DATA_LOG_DIR" >> "$CONFIG"
+
+    echo "tickTime=$ZOO_TICK_TIME" >> "$CONFIG"
+    echo "initLimit=$ZOO_INIT_LIMIT" >> "$CONFIG"
+    echo "syncLimit=$ZOO_SYNC_LIMIT" >> "$CONFIG"
+
+    echo "maxClientCnxns=$ZOO_MAX_CLIENT_CNXNS" >> "$CONFIG"
+
+    for server in $ZOO_SERVERS; do
+        echo "$server" >> "$CONFIG"
+    done
+fi
+
+# Write myid only if it doesn't exist
+if [[ ! -f "$ZOO_DATA_DIR/myid" ]]; then
+    echo "${ZOO_MY_ID:-1}" > "$ZOO_DATA_DIR/myid"
+fi
+
+exec "$@"

interview/note.md

@@ -78,4 +78,12 @@ Kafka | 7.31 | 7.26 | 完成理论复习，代码实践未完成
 - 7.26
   
 1. 完成kafka的复习
-2. 完成数据库的复习，B树和B+的原理
+2. 完成数据库的复习，B树和B+的原理
+
+- 7.27
+
+1. 百度深研提前批一轮面试
+
+- 7.30
+
+1. 完成剑指Offer的题目